1 //===-- LLParser.cpp - Parser Class ---------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines the parser class for .ll files.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "LLParser.h"
15 #include "llvm/ADT/SmallPtrSet.h"
16 #include "llvm/IR/AutoUpgrade.h"
17 #include "llvm/IR/CallingConv.h"
18 #include "llvm/IR/Constants.h"
19 #include "llvm/IR/DerivedTypes.h"
20 #include "llvm/IR/InlineAsm.h"
21 #include "llvm/IR/Instructions.h"
22 #include "llvm/IR/LLVMContext.h"
23 #include "llvm/IR/Module.h"
24 #include "llvm/IR/Operator.h"
25 #include "llvm/IR/ValueSymbolTable.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/Support/SaveAndRestore.h"
28 #include "llvm/Support/raw_ostream.h"
29 using namespace llvm;
30
getTypeString(Type * T)31 static std::string getTypeString(Type *T) {
32 std::string Result;
33 raw_string_ostream Tmp(Result);
34 Tmp << *T;
35 return Tmp.str();
36 }
37
38 /// Run: module ::= toplevelentity*
Run()39 bool LLParser::Run() {
40 // Prime the lexer.
41 Lex.Lex();
42
43 return ParseTopLevelEntities() ||
44 ValidateEndOfModule();
45 }
46
47 /// ValidateEndOfModule - Do final validity and sanity checks at the end of the
48 /// module.
ValidateEndOfModule()49 bool LLParser::ValidateEndOfModule() {
50 for (unsigned I = 0, E = InstsWithTBAATag.size(); I < E; I++)
51 UpgradeInstWithTBAATag(InstsWithTBAATag[I]);
52
53 // Handle any function attribute group forward references.
54 for (std::map<Value*, std::vector<unsigned> >::iterator
55 I = ForwardRefAttrGroups.begin(), E = ForwardRefAttrGroups.end();
56 I != E; ++I) {
57 Value *V = I->first;
58 std::vector<unsigned> &Vec = I->second;
59 AttrBuilder B;
60
61 for (std::vector<unsigned>::iterator VI = Vec.begin(), VE = Vec.end();
62 VI != VE; ++VI)
63 B.merge(NumberedAttrBuilders[*VI]);
64
65 if (Function *Fn = dyn_cast<Function>(V)) {
66 AttributeSet AS = Fn->getAttributes();
67 AttrBuilder FnAttrs(AS.getFnAttributes(), AttributeSet::FunctionIndex);
68 AS = AS.removeAttributes(Context, AttributeSet::FunctionIndex,
69 AS.getFnAttributes());
70
71 FnAttrs.merge(B);
72
73 // If the alignment was parsed as an attribute, move to the alignment
74 // field.
75 if (FnAttrs.hasAlignmentAttr()) {
76 Fn->setAlignment(FnAttrs.getAlignment());
77 FnAttrs.removeAttribute(Attribute::Alignment);
78 }
79
80 AS = AS.addAttributes(Context, AttributeSet::FunctionIndex,
81 AttributeSet::get(Context,
82 AttributeSet::FunctionIndex,
83 FnAttrs));
84 Fn->setAttributes(AS);
85 } else if (CallInst *CI = dyn_cast<CallInst>(V)) {
86 AttributeSet AS = CI->getAttributes();
87 AttrBuilder FnAttrs(AS.getFnAttributes(), AttributeSet::FunctionIndex);
88 AS = AS.removeAttributes(Context, AttributeSet::FunctionIndex,
89 AS.getFnAttributes());
90 FnAttrs.merge(B);
91 AS = AS.addAttributes(Context, AttributeSet::FunctionIndex,
92 AttributeSet::get(Context,
93 AttributeSet::FunctionIndex,
94 FnAttrs));
95 CI->setAttributes(AS);
96 } else if (InvokeInst *II = dyn_cast<InvokeInst>(V)) {
97 AttributeSet AS = II->getAttributes();
98 AttrBuilder FnAttrs(AS.getFnAttributes(), AttributeSet::FunctionIndex);
99 AS = AS.removeAttributes(Context, AttributeSet::FunctionIndex,
100 AS.getFnAttributes());
101 FnAttrs.merge(B);
102 AS = AS.addAttributes(Context, AttributeSet::FunctionIndex,
103 AttributeSet::get(Context,
104 AttributeSet::FunctionIndex,
105 FnAttrs));
106 II->setAttributes(AS);
107 } else {
108 llvm_unreachable("invalid object with forward attribute group reference");
109 }
110 }
111
112 // If there are entries in ForwardRefBlockAddresses at this point, the
113 // function was never defined.
114 if (!ForwardRefBlockAddresses.empty())
115 return Error(ForwardRefBlockAddresses.begin()->first.Loc,
116 "expected function name in blockaddress");
117
118 for (unsigned i = 0, e = NumberedTypes.size(); i != e; ++i)
119 if (NumberedTypes[i].second.isValid())
120 return Error(NumberedTypes[i].second,
121 "use of undefined type '%" + Twine(i) + "'");
122
123 for (StringMap<std::pair<Type*, LocTy> >::iterator I =
124 NamedTypes.begin(), E = NamedTypes.end(); I != E; ++I)
125 if (I->second.second.isValid())
126 return Error(I->second.second,
127 "use of undefined type named '" + I->getKey() + "'");
128
129 if (!ForwardRefComdats.empty())
130 return Error(ForwardRefComdats.begin()->second,
131 "use of undefined comdat '$" +
132 ForwardRefComdats.begin()->first + "'");
133
134 if (!ForwardRefVals.empty())
135 return Error(ForwardRefVals.begin()->second.second,
136 "use of undefined value '@" + ForwardRefVals.begin()->first +
137 "'");
138
139 if (!ForwardRefValIDs.empty())
140 return Error(ForwardRefValIDs.begin()->second.second,
141 "use of undefined value '@" +
142 Twine(ForwardRefValIDs.begin()->first) + "'");
143
144 if (!ForwardRefMDNodes.empty())
145 return Error(ForwardRefMDNodes.begin()->second.second,
146 "use of undefined metadata '!" +
147 Twine(ForwardRefMDNodes.begin()->first) + "'");
148
149 // Resolve metadata cycles.
150 for (auto &N : NumberedMetadata)
151 if (auto *U = cast_or_null<UniquableMDNode>(N))
152 U->resolveCycles();
153
154 // Look for intrinsic functions and CallInst that need to be upgraded
155 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; )
156 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove
157
158 UpgradeDebugInfo(*M);
159
160 return false;
161 }
162
163 //===----------------------------------------------------------------------===//
164 // Top-Level Entities
165 //===----------------------------------------------------------------------===//
166
ParseTopLevelEntities()167 bool LLParser::ParseTopLevelEntities() {
168 while (1) {
169 switch (Lex.getKind()) {
170 default: return TokError("expected top-level entity");
171 case lltok::Eof: return false;
172 case lltok::kw_declare: if (ParseDeclare()) return true; break;
173 case lltok::kw_define: if (ParseDefine()) return true; break;
174 case lltok::kw_module: if (ParseModuleAsm()) return true; break;
175 case lltok::kw_target: if (ParseTargetDefinition()) return true; break;
176 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break;
177 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break;
178 case lltok::LocalVar: if (ParseNamedType()) return true; break;
179 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break;
180 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break;
181 case lltok::ComdatVar: if (parseComdat()) return true; break;
182 case lltok::exclaim: if (ParseStandaloneMetadata()) return true; break;
183 case lltok::MetadataVar:if (ParseNamedMetadata()) return true; break;
184
185 // The Global variable production with no name can have many different
186 // optional leading prefixes, the production is:
187 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalDLLStorageClass
188 // OptionalThreadLocal OptionalAddrSpace OptionalUnNammedAddr
189 // ('constant'|'global') ...
190 case lltok::kw_private: // OptionalLinkage
191 case lltok::kw_internal: // OptionalLinkage
192 case lltok::kw_weak: // OptionalLinkage
193 case lltok::kw_weak_odr: // OptionalLinkage
194 case lltok::kw_linkonce: // OptionalLinkage
195 case lltok::kw_linkonce_odr: // OptionalLinkage
196 case lltok::kw_appending: // OptionalLinkage
197 case lltok::kw_common: // OptionalLinkage
198 case lltok::kw_extern_weak: // OptionalLinkage
199 case lltok::kw_external: // OptionalLinkage
200 case lltok::kw_default: // OptionalVisibility
201 case lltok::kw_hidden: // OptionalVisibility
202 case lltok::kw_protected: // OptionalVisibility
203 case lltok::kw_dllimport: // OptionalDLLStorageClass
204 case lltok::kw_dllexport: // OptionalDLLStorageClass
205 case lltok::kw_thread_local: // OptionalThreadLocal
206 case lltok::kw_addrspace: // OptionalAddrSpace
207 case lltok::kw_constant: // GlobalType
208 case lltok::kw_global: { // GlobalType
209 unsigned Linkage, Visibility, DLLStorageClass;
210 bool UnnamedAddr;
211 GlobalVariable::ThreadLocalMode TLM;
212 bool HasLinkage;
213 if (ParseOptionalLinkage(Linkage, HasLinkage) ||
214 ParseOptionalVisibility(Visibility) ||
215 ParseOptionalDLLStorageClass(DLLStorageClass) ||
216 ParseOptionalThreadLocal(TLM) ||
217 parseOptionalUnnamedAddr(UnnamedAddr) ||
218 ParseGlobal("", SMLoc(), Linkage, HasLinkage, Visibility,
219 DLLStorageClass, TLM, UnnamedAddr))
220 return true;
221 break;
222 }
223
224 case lltok::kw_attributes: if (ParseUnnamedAttrGrp()) return true; break;
225 case lltok::kw_uselistorder: if (ParseUseListOrder()) return true; break;
226 case lltok::kw_uselistorder_bb:
227 if (ParseUseListOrderBB()) return true; break;
228 }
229 }
230 }
231
232
233 /// toplevelentity
234 /// ::= 'module' 'asm' STRINGCONSTANT
ParseModuleAsm()235 bool LLParser::ParseModuleAsm() {
236 assert(Lex.getKind() == lltok::kw_module);
237 Lex.Lex();
238
239 std::string AsmStr;
240 if (ParseToken(lltok::kw_asm, "expected 'module asm'") ||
241 ParseStringConstant(AsmStr)) return true;
242
243 M->appendModuleInlineAsm(AsmStr);
244 return false;
245 }
246
247 /// toplevelentity
248 /// ::= 'target' 'triple' '=' STRINGCONSTANT
249 /// ::= 'target' 'datalayout' '=' STRINGCONSTANT
ParseTargetDefinition()250 bool LLParser::ParseTargetDefinition() {
251 assert(Lex.getKind() == lltok::kw_target);
252 std::string Str;
253 switch (Lex.Lex()) {
254 default: return TokError("unknown target property");
255 case lltok::kw_triple:
256 Lex.Lex();
257 if (ParseToken(lltok::equal, "expected '=' after target triple") ||
258 ParseStringConstant(Str))
259 return true;
260 M->setTargetTriple(Str);
261 return false;
262 case lltok::kw_datalayout:
263 Lex.Lex();
264 if (ParseToken(lltok::equal, "expected '=' after target datalayout") ||
265 ParseStringConstant(Str))
266 return true;
267 M->setDataLayout(Str);
268 return false;
269 }
270 }
271
272 /// toplevelentity
273 /// ::= 'deplibs' '=' '[' ']'
274 /// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']'
275 /// FIXME: Remove in 4.0. Currently parse, but ignore.
ParseDepLibs()276 bool LLParser::ParseDepLibs() {
277 assert(Lex.getKind() == lltok::kw_deplibs);
278 Lex.Lex();
279 if (ParseToken(lltok::equal, "expected '=' after deplibs") ||
280 ParseToken(lltok::lsquare, "expected '=' after deplibs"))
281 return true;
282
283 if (EatIfPresent(lltok::rsquare))
284 return false;
285
286 do {
287 std::string Str;
288 if (ParseStringConstant(Str)) return true;
289 } while (EatIfPresent(lltok::comma));
290
291 return ParseToken(lltok::rsquare, "expected ']' at end of list");
292 }
293
294 /// ParseUnnamedType:
295 /// ::= LocalVarID '=' 'type' type
ParseUnnamedType()296 bool LLParser::ParseUnnamedType() {
297 LocTy TypeLoc = Lex.getLoc();
298 unsigned TypeID = Lex.getUIntVal();
299 Lex.Lex(); // eat LocalVarID;
300
301 if (ParseToken(lltok::equal, "expected '=' after name") ||
302 ParseToken(lltok::kw_type, "expected 'type' after '='"))
303 return true;
304
305 if (TypeID >= NumberedTypes.size())
306 NumberedTypes.resize(TypeID+1);
307
308 Type *Result = nullptr;
309 if (ParseStructDefinition(TypeLoc, "",
310 NumberedTypes[TypeID], Result)) return true;
311
312 if (!isa<StructType>(Result)) {
313 std::pair<Type*, LocTy> &Entry = NumberedTypes[TypeID];
314 if (Entry.first)
315 return Error(TypeLoc, "non-struct types may not be recursive");
316 Entry.first = Result;
317 Entry.second = SMLoc();
318 }
319
320 return false;
321 }
322
323
324 /// toplevelentity
325 /// ::= LocalVar '=' 'type' type
ParseNamedType()326 bool LLParser::ParseNamedType() {
327 std::string Name = Lex.getStrVal();
328 LocTy NameLoc = Lex.getLoc();
329 Lex.Lex(); // eat LocalVar.
330
331 if (ParseToken(lltok::equal, "expected '=' after name") ||
332 ParseToken(lltok::kw_type, "expected 'type' after name"))
333 return true;
334
335 Type *Result = nullptr;
336 if (ParseStructDefinition(NameLoc, Name,
337 NamedTypes[Name], Result)) return true;
338
339 if (!isa<StructType>(Result)) {
340 std::pair<Type*, LocTy> &Entry = NamedTypes[Name];
341 if (Entry.first)
342 return Error(NameLoc, "non-struct types may not be recursive");
343 Entry.first = Result;
344 Entry.second = SMLoc();
345 }
346
347 return false;
348 }
349
350
351 /// toplevelentity
352 /// ::= 'declare' FunctionHeader
ParseDeclare()353 bool LLParser::ParseDeclare() {
354 assert(Lex.getKind() == lltok::kw_declare);
355 Lex.Lex();
356
357 Function *F;
358 return ParseFunctionHeader(F, false);
359 }
360
361 /// toplevelentity
362 /// ::= 'define' FunctionHeader '{' ...
ParseDefine()363 bool LLParser::ParseDefine() {
364 assert(Lex.getKind() == lltok::kw_define);
365 Lex.Lex();
366
367 Function *F;
368 return ParseFunctionHeader(F, true) ||
369 ParseFunctionBody(*F);
370 }
371
372 /// ParseGlobalType
373 /// ::= 'constant'
374 /// ::= 'global'
ParseGlobalType(bool & IsConstant)375 bool LLParser::ParseGlobalType(bool &IsConstant) {
376 if (Lex.getKind() == lltok::kw_constant)
377 IsConstant = true;
378 else if (Lex.getKind() == lltok::kw_global)
379 IsConstant = false;
380 else {
381 IsConstant = false;
382 return TokError("expected 'global' or 'constant'");
383 }
384 Lex.Lex();
385 return false;
386 }
387
388 /// ParseUnnamedGlobal:
389 /// OptionalVisibility ALIAS ...
390 /// OptionalLinkage OptionalVisibility OptionalDLLStorageClass
391 /// ... -> global variable
392 /// GlobalID '=' OptionalVisibility ALIAS ...
393 /// GlobalID '=' OptionalLinkage OptionalVisibility OptionalDLLStorageClass
394 /// ... -> global variable
ParseUnnamedGlobal()395 bool LLParser::ParseUnnamedGlobal() {
396 unsigned VarID = NumberedVals.size();
397 std::string Name;
398 LocTy NameLoc = Lex.getLoc();
399
400 // Handle the GlobalID form.
401 if (Lex.getKind() == lltok::GlobalID) {
402 if (Lex.getUIntVal() != VarID)
403 return Error(Lex.getLoc(), "variable expected to be numbered '%" +
404 Twine(VarID) + "'");
405 Lex.Lex(); // eat GlobalID;
406
407 if (ParseToken(lltok::equal, "expected '=' after name"))
408 return true;
409 }
410
411 bool HasLinkage;
412 unsigned Linkage, Visibility, DLLStorageClass;
413 GlobalVariable::ThreadLocalMode TLM;
414 bool UnnamedAddr;
415 if (ParseOptionalLinkage(Linkage, HasLinkage) ||
416 ParseOptionalVisibility(Visibility) ||
417 ParseOptionalDLLStorageClass(DLLStorageClass) ||
418 ParseOptionalThreadLocal(TLM) ||
419 parseOptionalUnnamedAddr(UnnamedAddr))
420 return true;
421
422 if (Lex.getKind() != lltok::kw_alias)
423 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility,
424 DLLStorageClass, TLM, UnnamedAddr);
425 return ParseAlias(Name, NameLoc, Linkage, Visibility, DLLStorageClass, TLM,
426 UnnamedAddr);
427 }
428
429 /// ParseNamedGlobal:
430 /// GlobalVar '=' OptionalVisibility ALIAS ...
431 /// GlobalVar '=' OptionalLinkage OptionalVisibility OptionalDLLStorageClass
432 /// ... -> global variable
ParseNamedGlobal()433 bool LLParser::ParseNamedGlobal() {
434 assert(Lex.getKind() == lltok::GlobalVar);
435 LocTy NameLoc = Lex.getLoc();
436 std::string Name = Lex.getStrVal();
437 Lex.Lex();
438
439 bool HasLinkage;
440 unsigned Linkage, Visibility, DLLStorageClass;
441 GlobalVariable::ThreadLocalMode TLM;
442 bool UnnamedAddr;
443 if (ParseToken(lltok::equal, "expected '=' in global variable") ||
444 ParseOptionalLinkage(Linkage, HasLinkage) ||
445 ParseOptionalVisibility(Visibility) ||
446 ParseOptionalDLLStorageClass(DLLStorageClass) ||
447 ParseOptionalThreadLocal(TLM) ||
448 parseOptionalUnnamedAddr(UnnamedAddr))
449 return true;
450
451 if (Lex.getKind() != lltok::kw_alias)
452 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility,
453 DLLStorageClass, TLM, UnnamedAddr);
454
455 return ParseAlias(Name, NameLoc, Linkage, Visibility, DLLStorageClass, TLM,
456 UnnamedAddr);
457 }
458
parseComdat()459 bool LLParser::parseComdat() {
460 assert(Lex.getKind() == lltok::ComdatVar);
461 std::string Name = Lex.getStrVal();
462 LocTy NameLoc = Lex.getLoc();
463 Lex.Lex();
464
465 if (ParseToken(lltok::equal, "expected '=' here"))
466 return true;
467
468 if (ParseToken(lltok::kw_comdat, "expected comdat keyword"))
469 return TokError("expected comdat type");
470
471 Comdat::SelectionKind SK;
472 switch (Lex.getKind()) {
473 default:
474 return TokError("unknown selection kind");
475 case lltok::kw_any:
476 SK = Comdat::Any;
477 break;
478 case lltok::kw_exactmatch:
479 SK = Comdat::ExactMatch;
480 break;
481 case lltok::kw_largest:
482 SK = Comdat::Largest;
483 break;
484 case lltok::kw_noduplicates:
485 SK = Comdat::NoDuplicates;
486 break;
487 case lltok::kw_samesize:
488 SK = Comdat::SameSize;
489 break;
490 }
491 Lex.Lex();
492
493 // See if the comdat was forward referenced, if so, use the comdat.
494 Module::ComdatSymTabType &ComdatSymTab = M->getComdatSymbolTable();
495 Module::ComdatSymTabType::iterator I = ComdatSymTab.find(Name);
496 if (I != ComdatSymTab.end() && !ForwardRefComdats.erase(Name))
497 return Error(NameLoc, "redefinition of comdat '$" + Name + "'");
498
499 Comdat *C;
500 if (I != ComdatSymTab.end())
501 C = &I->second;
502 else
503 C = M->getOrInsertComdat(Name);
504 C->setSelectionKind(SK);
505
506 return false;
507 }
508
509 // MDString:
510 // ::= '!' STRINGCONSTANT
ParseMDString(MDString * & Result)511 bool LLParser::ParseMDString(MDString *&Result) {
512 std::string Str;
513 if (ParseStringConstant(Str)) return true;
514 llvm::UpgradeMDStringConstant(Str);
515 Result = MDString::get(Context, Str);
516 return false;
517 }
518
519 // MDNode:
520 // ::= '!' MDNodeNumber
ParseMDNodeID(MDNode * & Result)521 bool LLParser::ParseMDNodeID(MDNode *&Result) {
522 // !{ ..., !42, ... }
523 unsigned MID = 0;
524 if (ParseUInt32(MID))
525 return true;
526
527 // If not a forward reference, just return it now.
528 if (MID < NumberedMetadata.size() && NumberedMetadata[MID] != nullptr) {
529 Result = NumberedMetadata[MID];
530 return false;
531 }
532
533 // Otherwise, create MDNode forward reference.
534 MDNodeFwdDecl *FwdNode = MDNodeFwdDecl::get(Context, None);
535 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc());
536
537 if (NumberedMetadata.size() <= MID)
538 NumberedMetadata.resize(MID+1);
539 NumberedMetadata[MID].reset(FwdNode);
540 Result = FwdNode;
541 return false;
542 }
543
544 /// ParseNamedMetadata:
545 /// !foo = !{ !1, !2 }
ParseNamedMetadata()546 bool LLParser::ParseNamedMetadata() {
547 assert(Lex.getKind() == lltok::MetadataVar);
548 std::string Name = Lex.getStrVal();
549 Lex.Lex();
550
551 if (ParseToken(lltok::equal, "expected '=' here") ||
552 ParseToken(lltok::exclaim, "Expected '!' here") ||
553 ParseToken(lltok::lbrace, "Expected '{' here"))
554 return true;
555
556 NamedMDNode *NMD = M->getOrInsertNamedMetadata(Name);
557 if (Lex.getKind() != lltok::rbrace)
558 do {
559 if (ParseToken(lltok::exclaim, "Expected '!' here"))
560 return true;
561
562 MDNode *N = nullptr;
563 if (ParseMDNodeID(N)) return true;
564 NMD->addOperand(N);
565 } while (EatIfPresent(lltok::comma));
566
567 if (ParseToken(lltok::rbrace, "expected end of metadata node"))
568 return true;
569
570 return false;
571 }
572
573 /// ParseStandaloneMetadata:
574 /// !42 = !{...}
ParseStandaloneMetadata()575 bool LLParser::ParseStandaloneMetadata() {
576 assert(Lex.getKind() == lltok::exclaim);
577 Lex.Lex();
578 unsigned MetadataID = 0;
579
580 MDNode *Init;
581 if (ParseUInt32(MetadataID) ||
582 ParseToken(lltok::equal, "expected '=' here"))
583 return true;
584
585 // Detect common error, from old metadata syntax.
586 if (Lex.getKind() == lltok::Type)
587 return TokError("unexpected type in metadata definition");
588
589 bool IsDistinct = EatIfPresent(lltok::kw_distinct);
590 if (Lex.getKind() == lltok::MetadataVar) {
591 if (ParseSpecializedMDNode(Init, IsDistinct))
592 return true;
593 } else if (ParseToken(lltok::exclaim, "Expected '!' here") ||
594 ParseMDTuple(Init, IsDistinct))
595 return true;
596
597 // See if this was forward referenced, if so, handle it.
598 auto FI = ForwardRefMDNodes.find(MetadataID);
599 if (FI != ForwardRefMDNodes.end()) {
600 MDNodeFwdDecl *Temp = FI->second.first;
601 Temp->replaceAllUsesWith(Init);
602 delete Temp;
603 ForwardRefMDNodes.erase(FI);
604
605 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work");
606 } else {
607 if (MetadataID >= NumberedMetadata.size())
608 NumberedMetadata.resize(MetadataID+1);
609
610 if (NumberedMetadata[MetadataID] != nullptr)
611 return TokError("Metadata id is already used");
612 NumberedMetadata[MetadataID].reset(Init);
613 }
614
615 return false;
616 }
617
isValidVisibilityForLinkage(unsigned V,unsigned L)618 static bool isValidVisibilityForLinkage(unsigned V, unsigned L) {
619 return !GlobalValue::isLocalLinkage((GlobalValue::LinkageTypes)L) ||
620 (GlobalValue::VisibilityTypes)V == GlobalValue::DefaultVisibility;
621 }
622
623 /// ParseAlias:
624 /// ::= GlobalVar '=' OptionalLinkage OptionalVisibility
625 /// OptionalDLLStorageClass OptionalThreadLocal
626 /// OptionalUnNammedAddr 'alias' Aliasee
627 ///
628 /// Aliasee
629 /// ::= TypeAndValue
630 ///
631 /// Everything through OptionalUnNammedAddr has already been parsed.
632 ///
ParseAlias(const std::string & Name,LocTy NameLoc,unsigned L,unsigned Visibility,unsigned DLLStorageClass,GlobalVariable::ThreadLocalMode TLM,bool UnnamedAddr)633 bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, unsigned L,
634 unsigned Visibility, unsigned DLLStorageClass,
635 GlobalVariable::ThreadLocalMode TLM,
636 bool UnnamedAddr) {
637 assert(Lex.getKind() == lltok::kw_alias);
638 Lex.Lex();
639
640 GlobalValue::LinkageTypes Linkage = (GlobalValue::LinkageTypes) L;
641
642 if(!GlobalAlias::isValidLinkage(Linkage))
643 return Error(NameLoc, "invalid linkage type for alias");
644
645 if (!isValidVisibilityForLinkage(Visibility, L))
646 return Error(NameLoc,
647 "symbol with local linkage must have default visibility");
648
649 Constant *Aliasee;
650 LocTy AliaseeLoc = Lex.getLoc();
651 if (Lex.getKind() != lltok::kw_bitcast &&
652 Lex.getKind() != lltok::kw_getelementptr &&
653 Lex.getKind() != lltok::kw_addrspacecast &&
654 Lex.getKind() != lltok::kw_inttoptr) {
655 if (ParseGlobalTypeAndValue(Aliasee))
656 return true;
657 } else {
658 // The bitcast dest type is not present, it is implied by the dest type.
659 ValID ID;
660 if (ParseValID(ID))
661 return true;
662 if (ID.Kind != ValID::t_Constant)
663 return Error(AliaseeLoc, "invalid aliasee");
664 Aliasee = ID.ConstantVal;
665 }
666
667 Type *AliaseeType = Aliasee->getType();
668 auto *PTy = dyn_cast<PointerType>(AliaseeType);
669 if (!PTy)
670 return Error(AliaseeLoc, "An alias must have pointer type");
671 Type *Ty = PTy->getElementType();
672 unsigned AddrSpace = PTy->getAddressSpace();
673
674 // Okay, create the alias but do not insert it into the module yet.
675 std::unique_ptr<GlobalAlias> GA(
676 GlobalAlias::create(Ty, AddrSpace, (GlobalValue::LinkageTypes)Linkage,
677 Name, Aliasee, /*Parent*/ nullptr));
678 GA->setThreadLocalMode(TLM);
679 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility);
680 GA->setDLLStorageClass((GlobalValue::DLLStorageClassTypes)DLLStorageClass);
681 GA->setUnnamedAddr(UnnamedAddr);
682
683 // See if this value already exists in the symbol table. If so, it is either
684 // a redefinition or a definition of a forward reference.
685 if (GlobalValue *Val = M->getNamedValue(Name)) {
686 // See if this was a redefinition. If so, there is no entry in
687 // ForwardRefVals.
688 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator
689 I = ForwardRefVals.find(Name);
690 if (I == ForwardRefVals.end())
691 return Error(NameLoc, "redefinition of global named '@" + Name + "'");
692
693 // Otherwise, this was a definition of forward ref. Verify that types
694 // agree.
695 if (Val->getType() != GA->getType())
696 return Error(NameLoc,
697 "forward reference and definition of alias have different types");
698
699 // If they agree, just RAUW the old value with the alias and remove the
700 // forward ref info.
701 Val->replaceAllUsesWith(GA.get());
702 Val->eraseFromParent();
703 ForwardRefVals.erase(I);
704 }
705
706 // Insert into the module, we know its name won't collide now.
707 M->getAliasList().push_back(GA.get());
708 assert(GA->getName() == Name && "Should not be a name conflict!");
709
710 // The module owns this now
711 GA.release();
712
713 return false;
714 }
715
716 /// ParseGlobal
717 /// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalDLLStorageClass
718 /// OptionalThreadLocal OptionalUnNammedAddr OptionalAddrSpace
719 /// OptionalExternallyInitialized GlobalType Type Const
720 /// ::= OptionalLinkage OptionalVisibility OptionalDLLStorageClass
721 /// OptionalThreadLocal OptionalUnNammedAddr OptionalAddrSpace
722 /// OptionalExternallyInitialized GlobalType Type Const
723 ///
724 /// Everything up to and including OptionalUnNammedAddr has been parsed
725 /// already.
726 ///
ParseGlobal(const std::string & Name,LocTy NameLoc,unsigned Linkage,bool HasLinkage,unsigned Visibility,unsigned DLLStorageClass,GlobalVariable::ThreadLocalMode TLM,bool UnnamedAddr)727 bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc,
728 unsigned Linkage, bool HasLinkage,
729 unsigned Visibility, unsigned DLLStorageClass,
730 GlobalVariable::ThreadLocalMode TLM,
731 bool UnnamedAddr) {
732 if (!isValidVisibilityForLinkage(Visibility, Linkage))
733 return Error(NameLoc,
734 "symbol with local linkage must have default visibility");
735
736 unsigned AddrSpace;
737 bool IsConstant, IsExternallyInitialized;
738 LocTy IsExternallyInitializedLoc;
739 LocTy TyLoc;
740
741 Type *Ty = nullptr;
742 if (ParseOptionalAddrSpace(AddrSpace) ||
743 ParseOptionalToken(lltok::kw_externally_initialized,
744 IsExternallyInitialized,
745 &IsExternallyInitializedLoc) ||
746 ParseGlobalType(IsConstant) ||
747 ParseType(Ty, TyLoc))
748 return true;
749
750 // If the linkage is specified and is external, then no initializer is
751 // present.
752 Constant *Init = nullptr;
753 if (!HasLinkage || (Linkage != GlobalValue::ExternalWeakLinkage &&
754 Linkage != GlobalValue::ExternalLinkage)) {
755 if (ParseGlobalValue(Ty, Init))
756 return true;
757 }
758
759 if (Ty->isFunctionTy() || Ty->isLabelTy())
760 return Error(TyLoc, "invalid type for global variable");
761
762 GlobalValue *GVal = nullptr;
763
764 // See if the global was forward referenced, if so, use the global.
765 if (!Name.empty()) {
766 GVal = M->getNamedValue(Name);
767 if (GVal) {
768 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal))
769 return Error(NameLoc, "redefinition of global '@" + Name + "'");
770 }
771 } else {
772 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator
773 I = ForwardRefValIDs.find(NumberedVals.size());
774 if (I != ForwardRefValIDs.end()) {
775 GVal = I->second.first;
776 ForwardRefValIDs.erase(I);
777 }
778 }
779
780 GlobalVariable *GV;
781 if (!GVal) {
782 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, nullptr,
783 Name, nullptr, GlobalVariable::NotThreadLocal,
784 AddrSpace);
785 } else {
786 if (GVal->getType()->getElementType() != Ty)
787 return Error(TyLoc,
788 "forward reference and definition of global have different types");
789
790 GV = cast<GlobalVariable>(GVal);
791
792 // Move the forward-reference to the correct spot in the module.
793 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV);
794 }
795
796 if (Name.empty())
797 NumberedVals.push_back(GV);
798
799 // Set the parsed properties on the global.
800 if (Init)
801 GV->setInitializer(Init);
802 GV->setConstant(IsConstant);
803 GV->setLinkage((GlobalValue::LinkageTypes)Linkage);
804 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility);
805 GV->setDLLStorageClass((GlobalValue::DLLStorageClassTypes)DLLStorageClass);
806 GV->setExternallyInitialized(IsExternallyInitialized);
807 GV->setThreadLocalMode(TLM);
808 GV->setUnnamedAddr(UnnamedAddr);
809
810 // Parse attributes on the global.
811 while (Lex.getKind() == lltok::comma) {
812 Lex.Lex();
813
814 if (Lex.getKind() == lltok::kw_section) {
815 Lex.Lex();
816 GV->setSection(Lex.getStrVal());
817 if (ParseToken(lltok::StringConstant, "expected global section string"))
818 return true;
819 } else if (Lex.getKind() == lltok::kw_align) {
820 unsigned Alignment;
821 if (ParseOptionalAlignment(Alignment)) return true;
822 GV->setAlignment(Alignment);
823 } else {
824 Comdat *C;
825 if (parseOptionalComdat(Name, C))
826 return true;
827 if (C)
828 GV->setComdat(C);
829 else
830 return TokError("unknown global variable property!");
831 }
832 }
833
834 return false;
835 }
836
837 /// ParseUnnamedAttrGrp
838 /// ::= 'attributes' AttrGrpID '=' '{' AttrValPair+ '}'
ParseUnnamedAttrGrp()839 bool LLParser::ParseUnnamedAttrGrp() {
840 assert(Lex.getKind() == lltok::kw_attributes);
841 LocTy AttrGrpLoc = Lex.getLoc();
842 Lex.Lex();
843
844 if (Lex.getKind() != lltok::AttrGrpID)
845 return TokError("expected attribute group id");
846
847 unsigned VarID = Lex.getUIntVal();
848 std::vector<unsigned> unused;
849 LocTy BuiltinLoc;
850 Lex.Lex();
851
852 if (ParseToken(lltok::equal, "expected '=' here") ||
853 ParseToken(lltok::lbrace, "expected '{' here") ||
854 ParseFnAttributeValuePairs(NumberedAttrBuilders[VarID], unused, true,
855 BuiltinLoc) ||
856 ParseToken(lltok::rbrace, "expected end of attribute group"))
857 return true;
858
859 if (!NumberedAttrBuilders[VarID].hasAttributes())
860 return Error(AttrGrpLoc, "attribute group has no attributes");
861
862 return false;
863 }
864
865 /// ParseFnAttributeValuePairs
866 /// ::= <attr> | <attr> '=' <value>
ParseFnAttributeValuePairs(AttrBuilder & B,std::vector<unsigned> & FwdRefAttrGrps,bool inAttrGrp,LocTy & BuiltinLoc)867 bool LLParser::ParseFnAttributeValuePairs(AttrBuilder &B,
868 std::vector<unsigned> &FwdRefAttrGrps,
869 bool inAttrGrp, LocTy &BuiltinLoc) {
870 bool HaveError = false;
871
872 B.clear();
873
874 while (true) {
875 lltok::Kind Token = Lex.getKind();
876 if (Token == lltok::kw_builtin)
877 BuiltinLoc = Lex.getLoc();
878 switch (Token) {
879 default:
880 if (!inAttrGrp) return HaveError;
881 return Error(Lex.getLoc(), "unterminated attribute group");
882 case lltok::rbrace:
883 // Finished.
884 return false;
885
886 case lltok::AttrGrpID: {
887 // Allow a function to reference an attribute group:
888 //
889 // define void @foo() #1 { ... }
890 if (inAttrGrp)
891 HaveError |=
892 Error(Lex.getLoc(),
893 "cannot have an attribute group reference in an attribute group");
894
895 unsigned AttrGrpNum = Lex.getUIntVal();
896 if (inAttrGrp) break;
897
898 // Save the reference to the attribute group. We'll fill it in later.
899 FwdRefAttrGrps.push_back(AttrGrpNum);
900 break;
901 }
902 // Target-dependent attributes:
903 case lltok::StringConstant: {
904 std::string Attr = Lex.getStrVal();
905 Lex.Lex();
906 std::string Val;
907 if (EatIfPresent(lltok::equal) &&
908 ParseStringConstant(Val))
909 return true;
910
911 B.addAttribute(Attr, Val);
912 continue;
913 }
914
915 // Target-independent attributes:
916 case lltok::kw_align: {
917 // As a hack, we allow function alignment to be initially parsed as an
918 // attribute on a function declaration/definition or added to an attribute
919 // group and later moved to the alignment field.
920 unsigned Alignment;
921 if (inAttrGrp) {
922 Lex.Lex();
923 if (ParseToken(lltok::equal, "expected '=' here") ||
924 ParseUInt32(Alignment))
925 return true;
926 } else {
927 if (ParseOptionalAlignment(Alignment))
928 return true;
929 }
930 B.addAlignmentAttr(Alignment);
931 continue;
932 }
933 case lltok::kw_alignstack: {
934 unsigned Alignment;
935 if (inAttrGrp) {
936 Lex.Lex();
937 if (ParseToken(lltok::equal, "expected '=' here") ||
938 ParseUInt32(Alignment))
939 return true;
940 } else {
941 if (ParseOptionalStackAlignment(Alignment))
942 return true;
943 }
944 B.addStackAlignmentAttr(Alignment);
945 continue;
946 }
947 case lltok::kw_alwaysinline: B.addAttribute(Attribute::AlwaysInline); break;
948 case lltok::kw_builtin: B.addAttribute(Attribute::Builtin); break;
949 case lltok::kw_cold: B.addAttribute(Attribute::Cold); break;
950 case lltok::kw_inlinehint: B.addAttribute(Attribute::InlineHint); break;
951 case lltok::kw_jumptable: B.addAttribute(Attribute::JumpTable); break;
952 case lltok::kw_minsize: B.addAttribute(Attribute::MinSize); break;
953 case lltok::kw_naked: B.addAttribute(Attribute::Naked); break;
954 case lltok::kw_nobuiltin: B.addAttribute(Attribute::NoBuiltin); break;
955 case lltok::kw_noduplicate: B.addAttribute(Attribute::NoDuplicate); break;
956 case lltok::kw_noimplicitfloat: B.addAttribute(Attribute::NoImplicitFloat); break;
957 case lltok::kw_noinline: B.addAttribute(Attribute::NoInline); break;
958 case lltok::kw_nonlazybind: B.addAttribute(Attribute::NonLazyBind); break;
959 case lltok::kw_noredzone: B.addAttribute(Attribute::NoRedZone); break;
960 case lltok::kw_noreturn: B.addAttribute(Attribute::NoReturn); break;
961 case lltok::kw_nounwind: B.addAttribute(Attribute::NoUnwind); break;
962 case lltok::kw_optnone: B.addAttribute(Attribute::OptimizeNone); break;
963 case lltok::kw_optsize: B.addAttribute(Attribute::OptimizeForSize); break;
964 case lltok::kw_readnone: B.addAttribute(Attribute::ReadNone); break;
965 case lltok::kw_readonly: B.addAttribute(Attribute::ReadOnly); break;
966 case lltok::kw_returns_twice: B.addAttribute(Attribute::ReturnsTwice); break;
967 case lltok::kw_ssp: B.addAttribute(Attribute::StackProtect); break;
968 case lltok::kw_sspreq: B.addAttribute(Attribute::StackProtectReq); break;
969 case lltok::kw_sspstrong: B.addAttribute(Attribute::StackProtectStrong); break;
970 case lltok::kw_sanitize_address: B.addAttribute(Attribute::SanitizeAddress); break;
971 case lltok::kw_sanitize_thread: B.addAttribute(Attribute::SanitizeThread); break;
972 case lltok::kw_sanitize_memory: B.addAttribute(Attribute::SanitizeMemory); break;
973 case lltok::kw_uwtable: B.addAttribute(Attribute::UWTable); break;
974
975 // Error handling.
976 case lltok::kw_inreg:
977 case lltok::kw_signext:
978 case lltok::kw_zeroext:
979 HaveError |=
980 Error(Lex.getLoc(),
981 "invalid use of attribute on a function");
982 break;
983 case lltok::kw_byval:
984 case lltok::kw_dereferenceable:
985 case lltok::kw_inalloca:
986 case lltok::kw_nest:
987 case lltok::kw_noalias:
988 case lltok::kw_nocapture:
989 case lltok::kw_nonnull:
990 case lltok::kw_returned:
991 case lltok::kw_sret:
992 HaveError |=
993 Error(Lex.getLoc(),
994 "invalid use of parameter-only attribute on a function");
995 break;
996 }
997
998 Lex.Lex();
999 }
1000 }
1001
1002 //===----------------------------------------------------------------------===//
1003 // GlobalValue Reference/Resolution Routines.
1004 //===----------------------------------------------------------------------===//
1005
1006 /// GetGlobalVal - Get a value with the specified name or ID, creating a
1007 /// forward reference record if needed. This can return null if the value
1008 /// exists but does not have the right type.
GetGlobalVal(const std::string & Name,Type * Ty,LocTy Loc)1009 GlobalValue *LLParser::GetGlobalVal(const std::string &Name, Type *Ty,
1010 LocTy Loc) {
1011 PointerType *PTy = dyn_cast<PointerType>(Ty);
1012 if (!PTy) {
1013 Error(Loc, "global variable reference must have pointer type");
1014 return nullptr;
1015 }
1016
1017 // Look this name up in the normal function symbol table.
1018 GlobalValue *Val =
1019 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name));
1020
1021 // If this is a forward reference for the value, see if we already created a
1022 // forward ref record.
1023 if (!Val) {
1024 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator
1025 I = ForwardRefVals.find(Name);
1026 if (I != ForwardRefVals.end())
1027 Val = I->second.first;
1028 }
1029
1030 // If we have the value in the symbol table or fwd-ref table, return it.
1031 if (Val) {
1032 if (Val->getType() == Ty) return Val;
1033 Error(Loc, "'@" + Name + "' defined with type '" +
1034 getTypeString(Val->getType()) + "'");
1035 return nullptr;
1036 }
1037
1038 // Otherwise, create a new forward reference for this value and remember it.
1039 GlobalValue *FwdVal;
1040 if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType()))
1041 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M);
1042 else
1043 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false,
1044 GlobalValue::ExternalWeakLinkage, nullptr, Name,
1045 nullptr, GlobalVariable::NotThreadLocal,
1046 PTy->getAddressSpace());
1047
1048 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc);
1049 return FwdVal;
1050 }
1051
GetGlobalVal(unsigned ID,Type * Ty,LocTy Loc)1052 GlobalValue *LLParser::GetGlobalVal(unsigned ID, Type *Ty, LocTy Loc) {
1053 PointerType *PTy = dyn_cast<PointerType>(Ty);
1054 if (!PTy) {
1055 Error(Loc, "global variable reference must have pointer type");
1056 return nullptr;
1057 }
1058
1059 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : nullptr;
1060
1061 // If this is a forward reference for the value, see if we already created a
1062 // forward ref record.
1063 if (!Val) {
1064 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator
1065 I = ForwardRefValIDs.find(ID);
1066 if (I != ForwardRefValIDs.end())
1067 Val = I->second.first;
1068 }
1069
1070 // If we have the value in the symbol table or fwd-ref table, return it.
1071 if (Val) {
1072 if (Val->getType() == Ty) return Val;
1073 Error(Loc, "'@" + Twine(ID) + "' defined with type '" +
1074 getTypeString(Val->getType()) + "'");
1075 return nullptr;
1076 }
1077
1078 // Otherwise, create a new forward reference for this value and remember it.
1079 GlobalValue *FwdVal;
1080 if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType()))
1081 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M);
1082 else
1083 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false,
1084 GlobalValue::ExternalWeakLinkage, nullptr, "");
1085
1086 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc);
1087 return FwdVal;
1088 }
1089
1090
1091 //===----------------------------------------------------------------------===//
1092 // Comdat Reference/Resolution Routines.
1093 //===----------------------------------------------------------------------===//
1094
getComdat(const std::string & Name,LocTy Loc)1095 Comdat *LLParser::getComdat(const std::string &Name, LocTy Loc) {
1096 // Look this name up in the comdat symbol table.
1097 Module::ComdatSymTabType &ComdatSymTab = M->getComdatSymbolTable();
1098 Module::ComdatSymTabType::iterator I = ComdatSymTab.find(Name);
1099 if (I != ComdatSymTab.end())
1100 return &I->second;
1101
1102 // Otherwise, create a new forward reference for this value and remember it.
1103 Comdat *C = M->getOrInsertComdat(Name);
1104 ForwardRefComdats[Name] = Loc;
1105 return C;
1106 }
1107
1108
1109 //===----------------------------------------------------------------------===//
1110 // Helper Routines.
1111 //===----------------------------------------------------------------------===//
1112
1113 /// ParseToken - If the current token has the specified kind, eat it and return
1114 /// success. Otherwise, emit the specified error and return failure.
ParseToken(lltok::Kind T,const char * ErrMsg)1115 bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) {
1116 if (Lex.getKind() != T)
1117 return TokError(ErrMsg);
1118 Lex.Lex();
1119 return false;
1120 }
1121
1122 /// ParseStringConstant
1123 /// ::= StringConstant
ParseStringConstant(std::string & Result)1124 bool LLParser::ParseStringConstant(std::string &Result) {
1125 if (Lex.getKind() != lltok::StringConstant)
1126 return TokError("expected string constant");
1127 Result = Lex.getStrVal();
1128 Lex.Lex();
1129 return false;
1130 }
1131
1132 /// ParseUInt32
1133 /// ::= uint32
ParseUInt32(unsigned & Val)1134 bool LLParser::ParseUInt32(unsigned &Val) {
1135 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned())
1136 return TokError("expected integer");
1137 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1);
1138 if (Val64 != unsigned(Val64))
1139 return TokError("expected 32-bit integer (too large)");
1140 Val = Val64;
1141 Lex.Lex();
1142 return false;
1143 }
1144
1145 /// ParseUInt64
1146 /// ::= uint64
ParseUInt64(uint64_t & Val)1147 bool LLParser::ParseUInt64(uint64_t &Val) {
1148 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned())
1149 return TokError("expected integer");
1150 Val = Lex.getAPSIntVal().getLimitedValue();
1151 Lex.Lex();
1152 return false;
1153 }
1154
1155 /// ParseTLSModel
1156 /// := 'localdynamic'
1157 /// := 'initialexec'
1158 /// := 'localexec'
ParseTLSModel(GlobalVariable::ThreadLocalMode & TLM)1159 bool LLParser::ParseTLSModel(GlobalVariable::ThreadLocalMode &TLM) {
1160 switch (Lex.getKind()) {
1161 default:
1162 return TokError("expected localdynamic, initialexec or localexec");
1163 case lltok::kw_localdynamic:
1164 TLM = GlobalVariable::LocalDynamicTLSModel;
1165 break;
1166 case lltok::kw_initialexec:
1167 TLM = GlobalVariable::InitialExecTLSModel;
1168 break;
1169 case lltok::kw_localexec:
1170 TLM = GlobalVariable::LocalExecTLSModel;
1171 break;
1172 }
1173
1174 Lex.Lex();
1175 return false;
1176 }
1177
1178 /// ParseOptionalThreadLocal
1179 /// := /*empty*/
1180 /// := 'thread_local'
1181 /// := 'thread_local' '(' tlsmodel ')'
ParseOptionalThreadLocal(GlobalVariable::ThreadLocalMode & TLM)1182 bool LLParser::ParseOptionalThreadLocal(GlobalVariable::ThreadLocalMode &TLM) {
1183 TLM = GlobalVariable::NotThreadLocal;
1184 if (!EatIfPresent(lltok::kw_thread_local))
1185 return false;
1186
1187 TLM = GlobalVariable::GeneralDynamicTLSModel;
1188 if (Lex.getKind() == lltok::lparen) {
1189 Lex.Lex();
1190 return ParseTLSModel(TLM) ||
1191 ParseToken(lltok::rparen, "expected ')' after thread local model");
1192 }
1193 return false;
1194 }
1195
1196 /// ParseOptionalAddrSpace
1197 /// := /*empty*/
1198 /// := 'addrspace' '(' uint32 ')'
ParseOptionalAddrSpace(unsigned & AddrSpace)1199 bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) {
1200 AddrSpace = 0;
1201 if (!EatIfPresent(lltok::kw_addrspace))
1202 return false;
1203 return ParseToken(lltok::lparen, "expected '(' in address space") ||
1204 ParseUInt32(AddrSpace) ||
1205 ParseToken(lltok::rparen, "expected ')' in address space");
1206 }
1207
1208 /// ParseOptionalParamAttrs - Parse a potentially empty list of parameter attributes.
ParseOptionalParamAttrs(AttrBuilder & B)1209 bool LLParser::ParseOptionalParamAttrs(AttrBuilder &B) {
1210 bool HaveError = false;
1211
1212 B.clear();
1213
1214 while (1) {
1215 lltok::Kind Token = Lex.getKind();
1216 switch (Token) {
1217 default: // End of attributes.
1218 return HaveError;
1219 case lltok::kw_align: {
1220 unsigned Alignment;
1221 if (ParseOptionalAlignment(Alignment))
1222 return true;
1223 B.addAlignmentAttr(Alignment);
1224 continue;
1225 }
1226 case lltok::kw_byval: B.addAttribute(Attribute::ByVal); break;
1227 case lltok::kw_dereferenceable: {
1228 uint64_t Bytes;
1229 if (ParseOptionalDereferenceableBytes(Bytes))
1230 return true;
1231 B.addDereferenceableAttr(Bytes);
1232 continue;
1233 }
1234 case lltok::kw_inalloca: B.addAttribute(Attribute::InAlloca); break;
1235 case lltok::kw_inreg: B.addAttribute(Attribute::InReg); break;
1236 case lltok::kw_nest: B.addAttribute(Attribute::Nest); break;
1237 case lltok::kw_noalias: B.addAttribute(Attribute::NoAlias); break;
1238 case lltok::kw_nocapture: B.addAttribute(Attribute::NoCapture); break;
1239 case lltok::kw_nonnull: B.addAttribute(Attribute::NonNull); break;
1240 case lltok::kw_readnone: B.addAttribute(Attribute::ReadNone); break;
1241 case lltok::kw_readonly: B.addAttribute(Attribute::ReadOnly); break;
1242 case lltok::kw_returned: B.addAttribute(Attribute::Returned); break;
1243 case lltok::kw_signext: B.addAttribute(Attribute::SExt); break;
1244 case lltok::kw_sret: B.addAttribute(Attribute::StructRet); break;
1245 case lltok::kw_zeroext: B.addAttribute(Attribute::ZExt); break;
1246
1247 case lltok::kw_alignstack:
1248 case lltok::kw_alwaysinline:
1249 case lltok::kw_builtin:
1250 case lltok::kw_inlinehint:
1251 case lltok::kw_jumptable:
1252 case lltok::kw_minsize:
1253 case lltok::kw_naked:
1254 case lltok::kw_nobuiltin:
1255 case lltok::kw_noduplicate:
1256 case lltok::kw_noimplicitfloat:
1257 case lltok::kw_noinline:
1258 case lltok::kw_nonlazybind:
1259 case lltok::kw_noredzone:
1260 case lltok::kw_noreturn:
1261 case lltok::kw_nounwind:
1262 case lltok::kw_optnone:
1263 case lltok::kw_optsize:
1264 case lltok::kw_returns_twice:
1265 case lltok::kw_sanitize_address:
1266 case lltok::kw_sanitize_memory:
1267 case lltok::kw_sanitize_thread:
1268 case lltok::kw_ssp:
1269 case lltok::kw_sspreq:
1270 case lltok::kw_sspstrong:
1271 case lltok::kw_uwtable:
1272 HaveError |= Error(Lex.getLoc(), "invalid use of function-only attribute");
1273 break;
1274 }
1275
1276 Lex.Lex();
1277 }
1278 }
1279
1280 /// ParseOptionalReturnAttrs - Parse a potentially empty list of return attributes.
ParseOptionalReturnAttrs(AttrBuilder & B)1281 bool LLParser::ParseOptionalReturnAttrs(AttrBuilder &B) {
1282 bool HaveError = false;
1283
1284 B.clear();
1285
1286 while (1) {
1287 lltok::Kind Token = Lex.getKind();
1288 switch (Token) {
1289 default: // End of attributes.
1290 return HaveError;
1291 case lltok::kw_dereferenceable: {
1292 uint64_t Bytes;
1293 if (ParseOptionalDereferenceableBytes(Bytes))
1294 return true;
1295 B.addDereferenceableAttr(Bytes);
1296 continue;
1297 }
1298 case lltok::kw_inreg: B.addAttribute(Attribute::InReg); break;
1299 case lltok::kw_noalias: B.addAttribute(Attribute::NoAlias); break;
1300 case lltok::kw_nonnull: B.addAttribute(Attribute::NonNull); break;
1301 case lltok::kw_signext: B.addAttribute(Attribute::SExt); break;
1302 case lltok::kw_zeroext: B.addAttribute(Attribute::ZExt); break;
1303
1304 // Error handling.
1305 case lltok::kw_align:
1306 case lltok::kw_byval:
1307 case lltok::kw_inalloca:
1308 case lltok::kw_nest:
1309 case lltok::kw_nocapture:
1310 case lltok::kw_returned:
1311 case lltok::kw_sret:
1312 HaveError |= Error(Lex.getLoc(), "invalid use of parameter-only attribute");
1313 break;
1314
1315 case lltok::kw_alignstack:
1316 case lltok::kw_alwaysinline:
1317 case lltok::kw_builtin:
1318 case lltok::kw_cold:
1319 case lltok::kw_inlinehint:
1320 case lltok::kw_jumptable:
1321 case lltok::kw_minsize:
1322 case lltok::kw_naked:
1323 case lltok::kw_nobuiltin:
1324 case lltok::kw_noduplicate:
1325 case lltok::kw_noimplicitfloat:
1326 case lltok::kw_noinline:
1327 case lltok::kw_nonlazybind:
1328 case lltok::kw_noredzone:
1329 case lltok::kw_noreturn:
1330 case lltok::kw_nounwind:
1331 case lltok::kw_optnone:
1332 case lltok::kw_optsize:
1333 case lltok::kw_returns_twice:
1334 case lltok::kw_sanitize_address:
1335 case lltok::kw_sanitize_memory:
1336 case lltok::kw_sanitize_thread:
1337 case lltok::kw_ssp:
1338 case lltok::kw_sspreq:
1339 case lltok::kw_sspstrong:
1340 case lltok::kw_uwtable:
1341 HaveError |= Error(Lex.getLoc(), "invalid use of function-only attribute");
1342 break;
1343
1344 case lltok::kw_readnone:
1345 case lltok::kw_readonly:
1346 HaveError |= Error(Lex.getLoc(), "invalid use of attribute on return type");
1347 }
1348
1349 Lex.Lex();
1350 }
1351 }
1352
1353 /// ParseOptionalLinkage
1354 /// ::= /*empty*/
1355 /// ::= 'private'
1356 /// ::= 'internal'
1357 /// ::= 'weak'
1358 /// ::= 'weak_odr'
1359 /// ::= 'linkonce'
1360 /// ::= 'linkonce_odr'
1361 /// ::= 'available_externally'
1362 /// ::= 'appending'
1363 /// ::= 'common'
1364 /// ::= 'extern_weak'
1365 /// ::= 'external'
ParseOptionalLinkage(unsigned & Res,bool & HasLinkage)1366 bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) {
1367 HasLinkage = false;
1368 switch (Lex.getKind()) {
1369 default: Res=GlobalValue::ExternalLinkage; return false;
1370 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break;
1371 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break;
1372 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break;
1373 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break;
1374 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break;
1375 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break;
1376 case lltok::kw_available_externally:
1377 Res = GlobalValue::AvailableExternallyLinkage;
1378 break;
1379 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break;
1380 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break;
1381 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break;
1382 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break;
1383 }
1384 Lex.Lex();
1385 HasLinkage = true;
1386 return false;
1387 }
1388
1389 /// ParseOptionalVisibility
1390 /// ::= /*empty*/
1391 /// ::= 'default'
1392 /// ::= 'hidden'
1393 /// ::= 'protected'
1394 ///
ParseOptionalVisibility(unsigned & Res)1395 bool LLParser::ParseOptionalVisibility(unsigned &Res) {
1396 switch (Lex.getKind()) {
1397 default: Res = GlobalValue::DefaultVisibility; return false;
1398 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break;
1399 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break;
1400 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break;
1401 }
1402 Lex.Lex();
1403 return false;
1404 }
1405
1406 /// ParseOptionalDLLStorageClass
1407 /// ::= /*empty*/
1408 /// ::= 'dllimport'
1409 /// ::= 'dllexport'
1410 ///
ParseOptionalDLLStorageClass(unsigned & Res)1411 bool LLParser::ParseOptionalDLLStorageClass(unsigned &Res) {
1412 switch (Lex.getKind()) {
1413 default: Res = GlobalValue::DefaultStorageClass; return false;
1414 case lltok::kw_dllimport: Res = GlobalValue::DLLImportStorageClass; break;
1415 case lltok::kw_dllexport: Res = GlobalValue::DLLExportStorageClass; break;
1416 }
1417 Lex.Lex();
1418 return false;
1419 }
1420
1421 /// ParseOptionalCallingConv
1422 /// ::= /*empty*/
1423 /// ::= 'ccc'
1424 /// ::= 'fastcc'
1425 /// ::= 'intel_ocl_bicc'
1426 /// ::= 'coldcc'
1427 /// ::= 'x86_stdcallcc'
1428 /// ::= 'x86_fastcallcc'
1429 /// ::= 'x86_thiscallcc'
1430 /// ::= 'x86_vectorcallcc'
1431 /// ::= 'arm_apcscc'
1432 /// ::= 'arm_aapcscc'
1433 /// ::= 'arm_aapcs_vfpcc'
1434 /// ::= 'msp430_intrcc'
1435 /// ::= 'ptx_kernel'
1436 /// ::= 'ptx_device'
1437 /// ::= 'spir_func'
1438 /// ::= 'spir_kernel'
1439 /// ::= 'x86_64_sysvcc'
1440 /// ::= 'x86_64_win64cc'
1441 /// ::= 'webkit_jscc'
1442 /// ::= 'anyregcc'
1443 /// ::= 'preserve_mostcc'
1444 /// ::= 'preserve_allcc'
1445 /// ::= 'ghccc'
1446 /// ::= 'cc' UINT
1447 ///
ParseOptionalCallingConv(unsigned & CC)1448 bool LLParser::ParseOptionalCallingConv(unsigned &CC) {
1449 switch (Lex.getKind()) {
1450 default: CC = CallingConv::C; return false;
1451 case lltok::kw_ccc: CC = CallingConv::C; break;
1452 case lltok::kw_fastcc: CC = CallingConv::Fast; break;
1453 case lltok::kw_coldcc: CC = CallingConv::Cold; break;
1454 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break;
1455 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break;
1456 case lltok::kw_x86_thiscallcc: CC = CallingConv::X86_ThisCall; break;
1457 case lltok::kw_x86_vectorcallcc:CC = CallingConv::X86_VectorCall; break;
1458 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break;
1459 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break;
1460 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break;
1461 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break;
1462 case lltok::kw_ptx_kernel: CC = CallingConv::PTX_Kernel; break;
1463 case lltok::kw_ptx_device: CC = CallingConv::PTX_Device; break;
1464 case lltok::kw_spir_kernel: CC = CallingConv::SPIR_KERNEL; break;
1465 case lltok::kw_spir_func: CC = CallingConv::SPIR_FUNC; break;
1466 case lltok::kw_intel_ocl_bicc: CC = CallingConv::Intel_OCL_BI; break;
1467 case lltok::kw_x86_64_sysvcc: CC = CallingConv::X86_64_SysV; break;
1468 case lltok::kw_x86_64_win64cc: CC = CallingConv::X86_64_Win64; break;
1469 case lltok::kw_webkit_jscc: CC = CallingConv::WebKit_JS; break;
1470 case lltok::kw_anyregcc: CC = CallingConv::AnyReg; break;
1471 case lltok::kw_preserve_mostcc:CC = CallingConv::PreserveMost; break;
1472 case lltok::kw_preserve_allcc: CC = CallingConv::PreserveAll; break;
1473 case lltok::kw_ghccc: CC = CallingConv::GHC; break;
1474 case lltok::kw_cc: {
1475 Lex.Lex();
1476 return ParseUInt32(CC);
1477 }
1478 }
1479
1480 Lex.Lex();
1481 return false;
1482 }
1483
1484 /// ParseInstructionMetadata
1485 /// ::= !dbg !42 (',' !dbg !57)*
ParseInstructionMetadata(Instruction * Inst,PerFunctionState * PFS)1486 bool LLParser::ParseInstructionMetadata(Instruction *Inst,
1487 PerFunctionState *PFS) {
1488 do {
1489 if (Lex.getKind() != lltok::MetadataVar)
1490 return TokError("expected metadata after comma");
1491
1492 std::string Name = Lex.getStrVal();
1493 unsigned MDK = M->getMDKindID(Name);
1494 Lex.Lex();
1495
1496 MDNode *N;
1497 if (ParseMDNode(N))
1498 return true;
1499
1500 Inst->setMetadata(MDK, N);
1501 if (MDK == LLVMContext::MD_tbaa)
1502 InstsWithTBAATag.push_back(Inst);
1503
1504 // If this is the end of the list, we're done.
1505 } while (EatIfPresent(lltok::comma));
1506 return false;
1507 }
1508
1509 /// ParseOptionalAlignment
1510 /// ::= /* empty */
1511 /// ::= 'align' 4
ParseOptionalAlignment(unsigned & Alignment)1512 bool LLParser::ParseOptionalAlignment(unsigned &Alignment) {
1513 Alignment = 0;
1514 if (!EatIfPresent(lltok::kw_align))
1515 return false;
1516 LocTy AlignLoc = Lex.getLoc();
1517 if (ParseUInt32(Alignment)) return true;
1518 if (!isPowerOf2_32(Alignment))
1519 return Error(AlignLoc, "alignment is not a power of two");
1520 if (Alignment > Value::MaximumAlignment)
1521 return Error(AlignLoc, "huge alignments are not supported yet");
1522 return false;
1523 }
1524
1525 /// ParseOptionalDereferenceableBytes
1526 /// ::= /* empty */
1527 /// ::= 'dereferenceable' '(' 4 ')'
ParseOptionalDereferenceableBytes(uint64_t & Bytes)1528 bool LLParser::ParseOptionalDereferenceableBytes(uint64_t &Bytes) {
1529 Bytes = 0;
1530 if (!EatIfPresent(lltok::kw_dereferenceable))
1531 return false;
1532 LocTy ParenLoc = Lex.getLoc();
1533 if (!EatIfPresent(lltok::lparen))
1534 return Error(ParenLoc, "expected '('");
1535 LocTy DerefLoc = Lex.getLoc();
1536 if (ParseUInt64(Bytes)) return true;
1537 ParenLoc = Lex.getLoc();
1538 if (!EatIfPresent(lltok::rparen))
1539 return Error(ParenLoc, "expected ')'");
1540 if (!Bytes)
1541 return Error(DerefLoc, "dereferenceable bytes must be non-zero");
1542 return false;
1543 }
1544
1545 /// ParseOptionalCommaAlign
1546 /// ::=
1547 /// ::= ',' align 4
1548 ///
1549 /// This returns with AteExtraComma set to true if it ate an excess comma at the
1550 /// end.
ParseOptionalCommaAlign(unsigned & Alignment,bool & AteExtraComma)1551 bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment,
1552 bool &AteExtraComma) {
1553 AteExtraComma = false;
1554 while (EatIfPresent(lltok::comma)) {
1555 // Metadata at the end is an early exit.
1556 if (Lex.getKind() == lltok::MetadataVar) {
1557 AteExtraComma = true;
1558 return false;
1559 }
1560
1561 if (Lex.getKind() != lltok::kw_align)
1562 return Error(Lex.getLoc(), "expected metadata or 'align'");
1563
1564 if (ParseOptionalAlignment(Alignment)) return true;
1565 }
1566
1567 return false;
1568 }
1569
1570 /// ParseScopeAndOrdering
1571 /// if isAtomic: ::= 'singlethread'? AtomicOrdering
1572 /// else: ::=
1573 ///
1574 /// This sets Scope and Ordering to the parsed values.
ParseScopeAndOrdering(bool isAtomic,SynchronizationScope & Scope,AtomicOrdering & Ordering)1575 bool LLParser::ParseScopeAndOrdering(bool isAtomic, SynchronizationScope &Scope,
1576 AtomicOrdering &Ordering) {
1577 if (!isAtomic)
1578 return false;
1579
1580 Scope = CrossThread;
1581 if (EatIfPresent(lltok::kw_singlethread))
1582 Scope = SingleThread;
1583
1584 return ParseOrdering(Ordering);
1585 }
1586
1587 /// ParseOrdering
1588 /// ::= AtomicOrdering
1589 ///
1590 /// This sets Ordering to the parsed value.
ParseOrdering(AtomicOrdering & Ordering)1591 bool LLParser::ParseOrdering(AtomicOrdering &Ordering) {
1592 switch (Lex.getKind()) {
1593 default: return TokError("Expected ordering on atomic instruction");
1594 case lltok::kw_unordered: Ordering = Unordered; break;
1595 case lltok::kw_monotonic: Ordering = Monotonic; break;
1596 case lltok::kw_acquire: Ordering = Acquire; break;
1597 case lltok::kw_release: Ordering = Release; break;
1598 case lltok::kw_acq_rel: Ordering = AcquireRelease; break;
1599 case lltok::kw_seq_cst: Ordering = SequentiallyConsistent; break;
1600 }
1601 Lex.Lex();
1602 return false;
1603 }
1604
1605 /// ParseOptionalStackAlignment
1606 /// ::= /* empty */
1607 /// ::= 'alignstack' '(' 4 ')'
ParseOptionalStackAlignment(unsigned & Alignment)1608 bool LLParser::ParseOptionalStackAlignment(unsigned &Alignment) {
1609 Alignment = 0;
1610 if (!EatIfPresent(lltok::kw_alignstack))
1611 return false;
1612 LocTy ParenLoc = Lex.getLoc();
1613 if (!EatIfPresent(lltok::lparen))
1614 return Error(ParenLoc, "expected '('");
1615 LocTy AlignLoc = Lex.getLoc();
1616 if (ParseUInt32(Alignment)) return true;
1617 ParenLoc = Lex.getLoc();
1618 if (!EatIfPresent(lltok::rparen))
1619 return Error(ParenLoc, "expected ')'");
1620 if (!isPowerOf2_32(Alignment))
1621 return Error(AlignLoc, "stack alignment is not a power of two");
1622 return false;
1623 }
1624
1625 /// ParseIndexList - This parses the index list for an insert/extractvalue
1626 /// instruction. This sets AteExtraComma in the case where we eat an extra
1627 /// comma at the end of the line and find that it is followed by metadata.
1628 /// Clients that don't allow metadata can call the version of this function that
1629 /// only takes one argument.
1630 ///
1631 /// ParseIndexList
1632 /// ::= (',' uint32)+
1633 ///
ParseIndexList(SmallVectorImpl<unsigned> & Indices,bool & AteExtraComma)1634 bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices,
1635 bool &AteExtraComma) {
1636 AteExtraComma = false;
1637
1638 if (Lex.getKind() != lltok::comma)
1639 return TokError("expected ',' as start of index list");
1640
1641 while (EatIfPresent(lltok::comma)) {
1642 if (Lex.getKind() == lltok::MetadataVar) {
1643 AteExtraComma = true;
1644 return false;
1645 }
1646 unsigned Idx = 0;
1647 if (ParseUInt32(Idx)) return true;
1648 Indices.push_back(Idx);
1649 }
1650
1651 return false;
1652 }
1653
1654 //===----------------------------------------------------------------------===//
1655 // Type Parsing.
1656 //===----------------------------------------------------------------------===//
1657
1658 /// ParseType - Parse a type.
ParseType(Type * & Result,const Twine & Msg,bool AllowVoid)1659 bool LLParser::ParseType(Type *&Result, const Twine &Msg, bool AllowVoid) {
1660 SMLoc TypeLoc = Lex.getLoc();
1661 switch (Lex.getKind()) {
1662 default:
1663 return TokError(Msg);
1664 case lltok::Type:
1665 // Type ::= 'float' | 'void' (etc)
1666 Result = Lex.getTyVal();
1667 Lex.Lex();
1668 break;
1669 case lltok::lbrace:
1670 // Type ::= StructType
1671 if (ParseAnonStructType(Result, false))
1672 return true;
1673 break;
1674 case lltok::lsquare:
1675 // Type ::= '[' ... ']'
1676 Lex.Lex(); // eat the lsquare.
1677 if (ParseArrayVectorType(Result, false))
1678 return true;
1679 break;
1680 case lltok::less: // Either vector or packed struct.
1681 // Type ::= '<' ... '>'
1682 Lex.Lex();
1683 if (Lex.getKind() == lltok::lbrace) {
1684 if (ParseAnonStructType(Result, true) ||
1685 ParseToken(lltok::greater, "expected '>' at end of packed struct"))
1686 return true;
1687 } else if (ParseArrayVectorType(Result, true))
1688 return true;
1689 break;
1690 case lltok::LocalVar: {
1691 // Type ::= %foo
1692 std::pair<Type*, LocTy> &Entry = NamedTypes[Lex.getStrVal()];
1693
1694 // If the type hasn't been defined yet, create a forward definition and
1695 // remember where that forward def'n was seen (in case it never is defined).
1696 if (!Entry.first) {
1697 Entry.first = StructType::create(Context, Lex.getStrVal());
1698 Entry.second = Lex.getLoc();
1699 }
1700 Result = Entry.first;
1701 Lex.Lex();
1702 break;
1703 }
1704
1705 case lltok::LocalVarID: {
1706 // Type ::= %4
1707 if (Lex.getUIntVal() >= NumberedTypes.size())
1708 NumberedTypes.resize(Lex.getUIntVal()+1);
1709 std::pair<Type*, LocTy> &Entry = NumberedTypes[Lex.getUIntVal()];
1710
1711 // If the type hasn't been defined yet, create a forward definition and
1712 // remember where that forward def'n was seen (in case it never is defined).
1713 if (!Entry.first) {
1714 Entry.first = StructType::create(Context);
1715 Entry.second = Lex.getLoc();
1716 }
1717 Result = Entry.first;
1718 Lex.Lex();
1719 break;
1720 }
1721 }
1722
1723 // Parse the type suffixes.
1724 while (1) {
1725 switch (Lex.getKind()) {
1726 // End of type.
1727 default:
1728 if (!AllowVoid && Result->isVoidTy())
1729 return Error(TypeLoc, "void type only allowed for function results");
1730 return false;
1731
1732 // Type ::= Type '*'
1733 case lltok::star:
1734 if (Result->isLabelTy())
1735 return TokError("basic block pointers are invalid");
1736 if (Result->isVoidTy())
1737 return TokError("pointers to void are invalid - use i8* instead");
1738 if (!PointerType::isValidElementType(Result))
1739 return TokError("pointer to this type is invalid");
1740 Result = PointerType::getUnqual(Result);
1741 Lex.Lex();
1742 break;
1743
1744 // Type ::= Type 'addrspace' '(' uint32 ')' '*'
1745 case lltok::kw_addrspace: {
1746 if (Result->isLabelTy())
1747 return TokError("basic block pointers are invalid");
1748 if (Result->isVoidTy())
1749 return TokError("pointers to void are invalid; use i8* instead");
1750 if (!PointerType::isValidElementType(Result))
1751 return TokError("pointer to this type is invalid");
1752 unsigned AddrSpace;
1753 if (ParseOptionalAddrSpace(AddrSpace) ||
1754 ParseToken(lltok::star, "expected '*' in address space"))
1755 return true;
1756
1757 Result = PointerType::get(Result, AddrSpace);
1758 break;
1759 }
1760
1761 /// Types '(' ArgTypeListI ')' OptFuncAttrs
1762 case lltok::lparen:
1763 if (ParseFunctionType(Result))
1764 return true;
1765 break;
1766 }
1767 }
1768 }
1769
1770 /// ParseParameterList
1771 /// ::= '(' ')'
1772 /// ::= '(' Arg (',' Arg)* ')'
1773 /// Arg
1774 /// ::= Type OptionalAttributes Value OptionalAttributes
ParseParameterList(SmallVectorImpl<ParamInfo> & ArgList,PerFunctionState & PFS,bool IsMustTailCall,bool InVarArgsFunc)1775 bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
1776 PerFunctionState &PFS, bool IsMustTailCall,
1777 bool InVarArgsFunc) {
1778 if (ParseToken(lltok::lparen, "expected '(' in call"))
1779 return true;
1780
1781 unsigned AttrIndex = 1;
1782 while (Lex.getKind() != lltok::rparen) {
1783 // If this isn't the first argument, we need a comma.
1784 if (!ArgList.empty() &&
1785 ParseToken(lltok::comma, "expected ',' in argument list"))
1786 return true;
1787
1788 // Parse an ellipsis if this is a musttail call in a variadic function.
1789 if (Lex.getKind() == lltok::dotdotdot) {
1790 const char *Msg = "unexpected ellipsis in argument list for ";
1791 if (!IsMustTailCall)
1792 return TokError(Twine(Msg) + "non-musttail call");
1793 if (!InVarArgsFunc)
1794 return TokError(Twine(Msg) + "musttail call in non-varargs function");
1795 Lex.Lex(); // Lex the '...', it is purely for readability.
1796 return ParseToken(lltok::rparen, "expected ')' at end of argument list");
1797 }
1798
1799 // Parse the argument.
1800 LocTy ArgLoc;
1801 Type *ArgTy = nullptr;
1802 AttrBuilder ArgAttrs;
1803 Value *V;
1804 if (ParseType(ArgTy, ArgLoc))
1805 return true;
1806
1807 if (ArgTy->isMetadataTy()) {
1808 if (ParseMetadataAsValue(V, PFS))
1809 return true;
1810 } else {
1811 // Otherwise, handle normal operands.
1812 if (ParseOptionalParamAttrs(ArgAttrs) || ParseValue(ArgTy, V, PFS))
1813 return true;
1814 }
1815 ArgList.push_back(ParamInfo(ArgLoc, V, AttributeSet::get(V->getContext(),
1816 AttrIndex++,
1817 ArgAttrs)));
1818 }
1819
1820 if (IsMustTailCall && InVarArgsFunc)
1821 return TokError("expected '...' at end of argument list for musttail call "
1822 "in varargs function");
1823
1824 Lex.Lex(); // Lex the ')'.
1825 return false;
1826 }
1827
1828
1829
1830 /// ParseArgumentList - Parse the argument list for a function type or function
1831 /// prototype.
1832 /// ::= '(' ArgTypeListI ')'
1833 /// ArgTypeListI
1834 /// ::= /*empty*/
1835 /// ::= '...'
1836 /// ::= ArgTypeList ',' '...'
1837 /// ::= ArgType (',' ArgType)*
1838 ///
ParseArgumentList(SmallVectorImpl<ArgInfo> & ArgList,bool & isVarArg)1839 bool LLParser::ParseArgumentList(SmallVectorImpl<ArgInfo> &ArgList,
1840 bool &isVarArg){
1841 isVarArg = false;
1842 assert(Lex.getKind() == lltok::lparen);
1843 Lex.Lex(); // eat the (.
1844
1845 if (Lex.getKind() == lltok::rparen) {
1846 // empty
1847 } else if (Lex.getKind() == lltok::dotdotdot) {
1848 isVarArg = true;
1849 Lex.Lex();
1850 } else {
1851 LocTy TypeLoc = Lex.getLoc();
1852 Type *ArgTy = nullptr;
1853 AttrBuilder Attrs;
1854 std::string Name;
1855
1856 if (ParseType(ArgTy) ||
1857 ParseOptionalParamAttrs(Attrs)) return true;
1858
1859 if (ArgTy->isVoidTy())
1860 return Error(TypeLoc, "argument can not have void type");
1861
1862 if (Lex.getKind() == lltok::LocalVar) {
1863 Name = Lex.getStrVal();
1864 Lex.Lex();
1865 }
1866
1867 if (!FunctionType::isValidArgumentType(ArgTy))
1868 return Error(TypeLoc, "invalid type for function argument");
1869
1870 unsigned AttrIndex = 1;
1871 ArgList.push_back(ArgInfo(TypeLoc, ArgTy,
1872 AttributeSet::get(ArgTy->getContext(),
1873 AttrIndex++, Attrs), Name));
1874
1875 while (EatIfPresent(lltok::comma)) {
1876 // Handle ... at end of arg list.
1877 if (EatIfPresent(lltok::dotdotdot)) {
1878 isVarArg = true;
1879 break;
1880 }
1881
1882 // Otherwise must be an argument type.
1883 TypeLoc = Lex.getLoc();
1884 if (ParseType(ArgTy) || ParseOptionalParamAttrs(Attrs)) return true;
1885
1886 if (ArgTy->isVoidTy())
1887 return Error(TypeLoc, "argument can not have void type");
1888
1889 if (Lex.getKind() == lltok::LocalVar) {
1890 Name = Lex.getStrVal();
1891 Lex.Lex();
1892 } else {
1893 Name = "";
1894 }
1895
1896 if (!ArgTy->isFirstClassType())
1897 return Error(TypeLoc, "invalid type for function argument");
1898
1899 ArgList.push_back(ArgInfo(TypeLoc, ArgTy,
1900 AttributeSet::get(ArgTy->getContext(),
1901 AttrIndex++, Attrs),
1902 Name));
1903 }
1904 }
1905
1906 return ParseToken(lltok::rparen, "expected ')' at end of argument list");
1907 }
1908
1909 /// ParseFunctionType
1910 /// ::= Type ArgumentList OptionalAttrs
ParseFunctionType(Type * & Result)1911 bool LLParser::ParseFunctionType(Type *&Result) {
1912 assert(Lex.getKind() == lltok::lparen);
1913
1914 if (!FunctionType::isValidReturnType(Result))
1915 return TokError("invalid function return type");
1916
1917 SmallVector<ArgInfo, 8> ArgList;
1918 bool isVarArg;
1919 if (ParseArgumentList(ArgList, isVarArg))
1920 return true;
1921
1922 // Reject names on the arguments lists.
1923 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
1924 if (!ArgList[i].Name.empty())
1925 return Error(ArgList[i].Loc, "argument name invalid in function type");
1926 if (ArgList[i].Attrs.hasAttributes(i + 1))
1927 return Error(ArgList[i].Loc,
1928 "argument attributes invalid in function type");
1929 }
1930
1931 SmallVector<Type*, 16> ArgListTy;
1932 for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
1933 ArgListTy.push_back(ArgList[i].Ty);
1934
1935 Result = FunctionType::get(Result, ArgListTy, isVarArg);
1936 return false;
1937 }
1938
1939 /// ParseAnonStructType - Parse an anonymous struct type, which is inlined into
1940 /// other structs.
ParseAnonStructType(Type * & Result,bool Packed)1941 bool LLParser::ParseAnonStructType(Type *&Result, bool Packed) {
1942 SmallVector<Type*, 8> Elts;
1943 if (ParseStructBody(Elts)) return true;
1944
1945 Result = StructType::get(Context, Elts, Packed);
1946 return false;
1947 }
1948
1949 /// ParseStructDefinition - Parse a struct in a 'type' definition.
ParseStructDefinition(SMLoc TypeLoc,StringRef Name,std::pair<Type *,LocTy> & Entry,Type * & ResultTy)1950 bool LLParser::ParseStructDefinition(SMLoc TypeLoc, StringRef Name,
1951 std::pair<Type*, LocTy> &Entry,
1952 Type *&ResultTy) {
1953 // If the type was already defined, diagnose the redefinition.
1954 if (Entry.first && !Entry.second.isValid())
1955 return Error(TypeLoc, "redefinition of type");
1956
1957 // If we have opaque, just return without filling in the definition for the
1958 // struct. This counts as a definition as far as the .ll file goes.
1959 if (EatIfPresent(lltok::kw_opaque)) {
1960 // This type is being defined, so clear the location to indicate this.
1961 Entry.second = SMLoc();
1962
1963 // If this type number has never been uttered, create it.
1964 if (!Entry.first)
1965 Entry.first = StructType::create(Context, Name);
1966 ResultTy = Entry.first;
1967 return false;
1968 }
1969
1970 // If the type starts with '<', then it is either a packed struct or a vector.
1971 bool isPacked = EatIfPresent(lltok::less);
1972
1973 // If we don't have a struct, then we have a random type alias, which we
1974 // accept for compatibility with old files. These types are not allowed to be
1975 // forward referenced and not allowed to be recursive.
1976 if (Lex.getKind() != lltok::lbrace) {
1977 if (Entry.first)
1978 return Error(TypeLoc, "forward references to non-struct type");
1979
1980 ResultTy = nullptr;
1981 if (isPacked)
1982 return ParseArrayVectorType(ResultTy, true);
1983 return ParseType(ResultTy);
1984 }
1985
1986 // This type is being defined, so clear the location to indicate this.
1987 Entry.second = SMLoc();
1988
1989 // If this type number has never been uttered, create it.
1990 if (!Entry.first)
1991 Entry.first = StructType::create(Context, Name);
1992
1993 StructType *STy = cast<StructType>(Entry.first);
1994
1995 SmallVector<Type*, 8> Body;
1996 if (ParseStructBody(Body) ||
1997 (isPacked && ParseToken(lltok::greater, "expected '>' in packed struct")))
1998 return true;
1999
2000 STy->setBody(Body, isPacked);
2001 ResultTy = STy;
2002 return false;
2003 }
2004
2005
2006 /// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere.
2007 /// StructType
2008 /// ::= '{' '}'
2009 /// ::= '{' Type (',' Type)* '}'
2010 /// ::= '<' '{' '}' '>'
2011 /// ::= '<' '{' Type (',' Type)* '}' '>'
ParseStructBody(SmallVectorImpl<Type * > & Body)2012 bool LLParser::ParseStructBody(SmallVectorImpl<Type*> &Body) {
2013 assert(Lex.getKind() == lltok::lbrace);
2014 Lex.Lex(); // Consume the '{'
2015
2016 // Handle the empty struct.
2017 if (EatIfPresent(lltok::rbrace))
2018 return false;
2019
2020 LocTy EltTyLoc = Lex.getLoc();
2021 Type *Ty = nullptr;
2022 if (ParseType(Ty)) return true;
2023 Body.push_back(Ty);
2024
2025 if (!StructType::isValidElementType(Ty))
2026 return Error(EltTyLoc, "invalid element type for struct");
2027
2028 while (EatIfPresent(lltok::comma)) {
2029 EltTyLoc = Lex.getLoc();
2030 if (ParseType(Ty)) return true;
2031
2032 if (!StructType::isValidElementType(Ty))
2033 return Error(EltTyLoc, "invalid element type for struct");
2034
2035 Body.push_back(Ty);
2036 }
2037
2038 return ParseToken(lltok::rbrace, "expected '}' at end of struct");
2039 }
2040
2041 /// ParseArrayVectorType - Parse an array or vector type, assuming the first
2042 /// token has already been consumed.
2043 /// Type
2044 /// ::= '[' APSINTVAL 'x' Types ']'
2045 /// ::= '<' APSINTVAL 'x' Types '>'
ParseArrayVectorType(Type * & Result,bool isVector)2046 bool LLParser::ParseArrayVectorType(Type *&Result, bool isVector) {
2047 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() ||
2048 Lex.getAPSIntVal().getBitWidth() > 64)
2049 return TokError("expected number in address space");
2050
2051 LocTy SizeLoc = Lex.getLoc();
2052 uint64_t Size = Lex.getAPSIntVal().getZExtValue();
2053 Lex.Lex();
2054
2055 if (ParseToken(lltok::kw_x, "expected 'x' after element count"))
2056 return true;
2057
2058 LocTy TypeLoc = Lex.getLoc();
2059 Type *EltTy = nullptr;
2060 if (ParseType(EltTy)) return true;
2061
2062 if (ParseToken(isVector ? lltok::greater : lltok::rsquare,
2063 "expected end of sequential type"))
2064 return true;
2065
2066 if (isVector) {
2067 if (Size == 0)
2068 return Error(SizeLoc, "zero element vector is illegal");
2069 if ((unsigned)Size != Size)
2070 return Error(SizeLoc, "size too large for vector");
2071 if (!VectorType::isValidElementType(EltTy))
2072 return Error(TypeLoc, "invalid vector element type");
2073 Result = VectorType::get(EltTy, unsigned(Size));
2074 } else {
2075 if (!ArrayType::isValidElementType(EltTy))
2076 return Error(TypeLoc, "invalid array element type");
2077 Result = ArrayType::get(EltTy, Size);
2078 }
2079 return false;
2080 }
2081
2082 //===----------------------------------------------------------------------===//
2083 // Function Semantic Analysis.
2084 //===----------------------------------------------------------------------===//
2085
PerFunctionState(LLParser & p,Function & f,int functionNumber)2086 LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f,
2087 int functionNumber)
2088 : P(p), F(f), FunctionNumber(functionNumber) {
2089
2090 // Insert unnamed arguments into the NumberedVals list.
2091 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end();
2092 AI != E; ++AI)
2093 if (!AI->hasName())
2094 NumberedVals.push_back(AI);
2095 }
2096
~PerFunctionState()2097 LLParser::PerFunctionState::~PerFunctionState() {
2098 // If there were any forward referenced non-basicblock values, delete them.
2099 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator
2100 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I)
2101 if (!isa<BasicBlock>(I->second.first)) {
2102 I->second.first->replaceAllUsesWith(
2103 UndefValue::get(I->second.first->getType()));
2104 delete I->second.first;
2105 I->second.first = nullptr;
2106 }
2107
2108 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator
2109 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I)
2110 if (!isa<BasicBlock>(I->second.first)) {
2111 I->second.first->replaceAllUsesWith(
2112 UndefValue::get(I->second.first->getType()));
2113 delete I->second.first;
2114 I->second.first = nullptr;
2115 }
2116 }
2117
FinishFunction()2118 bool LLParser::PerFunctionState::FinishFunction() {
2119 if (!ForwardRefVals.empty())
2120 return P.Error(ForwardRefVals.begin()->second.second,
2121 "use of undefined value '%" + ForwardRefVals.begin()->first +
2122 "'");
2123 if (!ForwardRefValIDs.empty())
2124 return P.Error(ForwardRefValIDs.begin()->second.second,
2125 "use of undefined value '%" +
2126 Twine(ForwardRefValIDs.begin()->first) + "'");
2127 return false;
2128 }
2129
2130
2131 /// GetVal - Get a value with the specified name or ID, creating a
2132 /// forward reference record if needed. This can return null if the value
2133 /// exists but does not have the right type.
GetVal(const std::string & Name,Type * Ty,LocTy Loc)2134 Value *LLParser::PerFunctionState::GetVal(const std::string &Name,
2135 Type *Ty, LocTy Loc) {
2136 // Look this name up in the normal function symbol table.
2137 Value *Val = F.getValueSymbolTable().lookup(Name);
2138
2139 // If this is a forward reference for the value, see if we already created a
2140 // forward ref record.
2141 if (!Val) {
2142 std::map<std::string, std::pair<Value*, LocTy> >::iterator
2143 I = ForwardRefVals.find(Name);
2144 if (I != ForwardRefVals.end())
2145 Val = I->second.first;
2146 }
2147
2148 // If we have the value in the symbol table or fwd-ref table, return it.
2149 if (Val) {
2150 if (Val->getType() == Ty) return Val;
2151 if (Ty->isLabelTy())
2152 P.Error(Loc, "'%" + Name + "' is not a basic block");
2153 else
2154 P.Error(Loc, "'%" + Name + "' defined with type '" +
2155 getTypeString(Val->getType()) + "'");
2156 return nullptr;
2157 }
2158
2159 // Don't make placeholders with invalid type.
2160 if (!Ty->isFirstClassType()) {
2161 P.Error(Loc, "invalid use of a non-first-class type");
2162 return nullptr;
2163 }
2164
2165 // Otherwise, create a new forward reference for this value and remember it.
2166 Value *FwdVal;
2167 if (Ty->isLabelTy())
2168 FwdVal = BasicBlock::Create(F.getContext(), Name, &F);
2169 else
2170 FwdVal = new Argument(Ty, Name);
2171
2172 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc);
2173 return FwdVal;
2174 }
2175
GetVal(unsigned ID,Type * Ty,LocTy Loc)2176 Value *LLParser::PerFunctionState::GetVal(unsigned ID, Type *Ty,
2177 LocTy Loc) {
2178 // Look this name up in the normal function symbol table.
2179 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : nullptr;
2180
2181 // If this is a forward reference for the value, see if we already created a
2182 // forward ref record.
2183 if (!Val) {
2184 std::map<unsigned, std::pair<Value*, LocTy> >::iterator
2185 I = ForwardRefValIDs.find(ID);
2186 if (I != ForwardRefValIDs.end())
2187 Val = I->second.first;
2188 }
2189
2190 // If we have the value in the symbol table or fwd-ref table, return it.
2191 if (Val) {
2192 if (Val->getType() == Ty) return Val;
2193 if (Ty->isLabelTy())
2194 P.Error(Loc, "'%" + Twine(ID) + "' is not a basic block");
2195 else
2196 P.Error(Loc, "'%" + Twine(ID) + "' defined with type '" +
2197 getTypeString(Val->getType()) + "'");
2198 return nullptr;
2199 }
2200
2201 if (!Ty->isFirstClassType()) {
2202 P.Error(Loc, "invalid use of a non-first-class type");
2203 return nullptr;
2204 }
2205
2206 // Otherwise, create a new forward reference for this value and remember it.
2207 Value *FwdVal;
2208 if (Ty->isLabelTy())
2209 FwdVal = BasicBlock::Create(F.getContext(), "", &F);
2210 else
2211 FwdVal = new Argument(Ty);
2212
2213 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc);
2214 return FwdVal;
2215 }
2216
2217 /// SetInstName - After an instruction is parsed and inserted into its
2218 /// basic block, this installs its name.
SetInstName(int NameID,const std::string & NameStr,LocTy NameLoc,Instruction * Inst)2219 bool LLParser::PerFunctionState::SetInstName(int NameID,
2220 const std::string &NameStr,
2221 LocTy NameLoc, Instruction *Inst) {
2222 // If this instruction has void type, it cannot have a name or ID specified.
2223 if (Inst->getType()->isVoidTy()) {
2224 if (NameID != -1 || !NameStr.empty())
2225 return P.Error(NameLoc, "instructions returning void cannot have a name");
2226 return false;
2227 }
2228
2229 // If this was a numbered instruction, verify that the instruction is the
2230 // expected value and resolve any forward references.
2231 if (NameStr.empty()) {
2232 // If neither a name nor an ID was specified, just use the next ID.
2233 if (NameID == -1)
2234 NameID = NumberedVals.size();
2235
2236 if (unsigned(NameID) != NumberedVals.size())
2237 return P.Error(NameLoc, "instruction expected to be numbered '%" +
2238 Twine(NumberedVals.size()) + "'");
2239
2240 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI =
2241 ForwardRefValIDs.find(NameID);
2242 if (FI != ForwardRefValIDs.end()) {
2243 if (FI->second.first->getType() != Inst->getType())
2244 return P.Error(NameLoc, "instruction forward referenced with type '" +
2245 getTypeString(FI->second.first->getType()) + "'");
2246 FI->second.first->replaceAllUsesWith(Inst);
2247 delete FI->second.first;
2248 ForwardRefValIDs.erase(FI);
2249 }
2250
2251 NumberedVals.push_back(Inst);
2252 return false;
2253 }
2254
2255 // Otherwise, the instruction had a name. Resolve forward refs and set it.
2256 std::map<std::string, std::pair<Value*, LocTy> >::iterator
2257 FI = ForwardRefVals.find(NameStr);
2258 if (FI != ForwardRefVals.end()) {
2259 if (FI->second.first->getType() != Inst->getType())
2260 return P.Error(NameLoc, "instruction forward referenced with type '" +
2261 getTypeString(FI->second.first->getType()) + "'");
2262 FI->second.first->replaceAllUsesWith(Inst);
2263 delete FI->second.first;
2264 ForwardRefVals.erase(FI);
2265 }
2266
2267 // Set the name on the instruction.
2268 Inst->setName(NameStr);
2269
2270 if (Inst->getName() != NameStr)
2271 return P.Error(NameLoc, "multiple definition of local value named '" +
2272 NameStr + "'");
2273 return false;
2274 }
2275
2276 /// GetBB - Get a basic block with the specified name or ID, creating a
2277 /// forward reference record if needed.
GetBB(const std::string & Name,LocTy Loc)2278 BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name,
2279 LocTy Loc) {
2280 return cast_or_null<BasicBlock>(GetVal(Name,
2281 Type::getLabelTy(F.getContext()), Loc));
2282 }
2283
GetBB(unsigned ID,LocTy Loc)2284 BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) {
2285 return cast_or_null<BasicBlock>(GetVal(ID,
2286 Type::getLabelTy(F.getContext()), Loc));
2287 }
2288
2289 /// DefineBB - Define the specified basic block, which is either named or
2290 /// unnamed. If there is an error, this returns null otherwise it returns
2291 /// the block being defined.
DefineBB(const std::string & Name,LocTy Loc)2292 BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name,
2293 LocTy Loc) {
2294 BasicBlock *BB;
2295 if (Name.empty())
2296 BB = GetBB(NumberedVals.size(), Loc);
2297 else
2298 BB = GetBB(Name, Loc);
2299 if (!BB) return nullptr; // Already diagnosed error.
2300
2301 // Move the block to the end of the function. Forward ref'd blocks are
2302 // inserted wherever they happen to be referenced.
2303 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB);
2304
2305 // Remove the block from forward ref sets.
2306 if (Name.empty()) {
2307 ForwardRefValIDs.erase(NumberedVals.size());
2308 NumberedVals.push_back(BB);
2309 } else {
2310 // BB forward references are already in the function symbol table.
2311 ForwardRefVals.erase(Name);
2312 }
2313
2314 return BB;
2315 }
2316
2317 //===----------------------------------------------------------------------===//
2318 // Constants.
2319 //===----------------------------------------------------------------------===//
2320
2321 /// ParseValID - Parse an abstract value that doesn't necessarily have a
2322 /// type implied. For example, if we parse "4" we don't know what integer type
2323 /// it has. The value will later be combined with its type and checked for
2324 /// sanity. PFS is used to convert function-local operands of metadata (since
2325 /// metadata operands are not just parsed here but also converted to values).
2326 /// PFS can be null when we are not parsing metadata values inside a function.
ParseValID(ValID & ID,PerFunctionState * PFS)2327 bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) {
2328 ID.Loc = Lex.getLoc();
2329 switch (Lex.getKind()) {
2330 default: return TokError("expected value token");
2331 case lltok::GlobalID: // @42
2332 ID.UIntVal = Lex.getUIntVal();
2333 ID.Kind = ValID::t_GlobalID;
2334 break;
2335 case lltok::GlobalVar: // @foo
2336 ID.StrVal = Lex.getStrVal();
2337 ID.Kind = ValID::t_GlobalName;
2338 break;
2339 case lltok::LocalVarID: // %42
2340 ID.UIntVal = Lex.getUIntVal();
2341 ID.Kind = ValID::t_LocalID;
2342 break;
2343 case lltok::LocalVar: // %foo
2344 ID.StrVal = Lex.getStrVal();
2345 ID.Kind = ValID::t_LocalName;
2346 break;
2347 case lltok::APSInt:
2348 ID.APSIntVal = Lex.getAPSIntVal();
2349 ID.Kind = ValID::t_APSInt;
2350 break;
2351 case lltok::APFloat:
2352 ID.APFloatVal = Lex.getAPFloatVal();
2353 ID.Kind = ValID::t_APFloat;
2354 break;
2355 case lltok::kw_true:
2356 ID.ConstantVal = ConstantInt::getTrue(Context);
2357 ID.Kind = ValID::t_Constant;
2358 break;
2359 case lltok::kw_false:
2360 ID.ConstantVal = ConstantInt::getFalse(Context);
2361 ID.Kind = ValID::t_Constant;
2362 break;
2363 case lltok::kw_null: ID.Kind = ValID::t_Null; break;
2364 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break;
2365 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break;
2366
2367 case lltok::lbrace: {
2368 // ValID ::= '{' ConstVector '}'
2369 Lex.Lex();
2370 SmallVector<Constant*, 16> Elts;
2371 if (ParseGlobalValueVector(Elts) ||
2372 ParseToken(lltok::rbrace, "expected end of struct constant"))
2373 return true;
2374
2375 ID.ConstantStructElts = new Constant*[Elts.size()];
2376 ID.UIntVal = Elts.size();
2377 memcpy(ID.ConstantStructElts, Elts.data(), Elts.size()*sizeof(Elts[0]));
2378 ID.Kind = ValID::t_ConstantStruct;
2379 return false;
2380 }
2381 case lltok::less: {
2382 // ValID ::= '<' ConstVector '>' --> Vector.
2383 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct.
2384 Lex.Lex();
2385 bool isPackedStruct = EatIfPresent(lltok::lbrace);
2386
2387 SmallVector<Constant*, 16> Elts;
2388 LocTy FirstEltLoc = Lex.getLoc();
2389 if (ParseGlobalValueVector(Elts) ||
2390 (isPackedStruct &&
2391 ParseToken(lltok::rbrace, "expected end of packed struct")) ||
2392 ParseToken(lltok::greater, "expected end of constant"))
2393 return true;
2394
2395 if (isPackedStruct) {
2396 ID.ConstantStructElts = new Constant*[Elts.size()];
2397 memcpy(ID.ConstantStructElts, Elts.data(), Elts.size()*sizeof(Elts[0]));
2398 ID.UIntVal = Elts.size();
2399 ID.Kind = ValID::t_PackedConstantStruct;
2400 return false;
2401 }
2402
2403 if (Elts.empty())
2404 return Error(ID.Loc, "constant vector must not be empty");
2405
2406 if (!Elts[0]->getType()->isIntegerTy() &&
2407 !Elts[0]->getType()->isFloatingPointTy() &&
2408 !Elts[0]->getType()->isPointerTy())
2409 return Error(FirstEltLoc,
2410 "vector elements must have integer, pointer or floating point type");
2411
2412 // Verify that all the vector elements have the same type.
2413 for (unsigned i = 1, e = Elts.size(); i != e; ++i)
2414 if (Elts[i]->getType() != Elts[0]->getType())
2415 return Error(FirstEltLoc,
2416 "vector element #" + Twine(i) +
2417 " is not of type '" + getTypeString(Elts[0]->getType()));
2418
2419 ID.ConstantVal = ConstantVector::get(Elts);
2420 ID.Kind = ValID::t_Constant;
2421 return false;
2422 }
2423 case lltok::lsquare: { // Array Constant
2424 Lex.Lex();
2425 SmallVector<Constant*, 16> Elts;
2426 LocTy FirstEltLoc = Lex.getLoc();
2427 if (ParseGlobalValueVector(Elts) ||
2428 ParseToken(lltok::rsquare, "expected end of array constant"))
2429 return true;
2430
2431 // Handle empty element.
2432 if (Elts.empty()) {
2433 // Use undef instead of an array because it's inconvenient to determine
2434 // the element type at this point, there being no elements to examine.
2435 ID.Kind = ValID::t_EmptyArray;
2436 return false;
2437 }
2438
2439 if (!Elts[0]->getType()->isFirstClassType())
2440 return Error(FirstEltLoc, "invalid array element type: " +
2441 getTypeString(Elts[0]->getType()));
2442
2443 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size());
2444
2445 // Verify all elements are correct type!
2446 for (unsigned i = 0, e = Elts.size(); i != e; ++i) {
2447 if (Elts[i]->getType() != Elts[0]->getType())
2448 return Error(FirstEltLoc,
2449 "array element #" + Twine(i) +
2450 " is not of type '" + getTypeString(Elts[0]->getType()));
2451 }
2452
2453 ID.ConstantVal = ConstantArray::get(ATy, Elts);
2454 ID.Kind = ValID::t_Constant;
2455 return false;
2456 }
2457 case lltok::kw_c: // c "foo"
2458 Lex.Lex();
2459 ID.ConstantVal = ConstantDataArray::getString(Context, Lex.getStrVal(),
2460 false);
2461 if (ParseToken(lltok::StringConstant, "expected string")) return true;
2462 ID.Kind = ValID::t_Constant;
2463 return false;
2464
2465 case lltok::kw_asm: {
2466 // ValID ::= 'asm' SideEffect? AlignStack? IntelDialect? STRINGCONSTANT ','
2467 // STRINGCONSTANT
2468 bool HasSideEffect, AlignStack, AsmDialect;
2469 Lex.Lex();
2470 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) ||
2471 ParseOptionalToken(lltok::kw_alignstack, AlignStack) ||
2472 ParseOptionalToken(lltok::kw_inteldialect, AsmDialect) ||
2473 ParseStringConstant(ID.StrVal) ||
2474 ParseToken(lltok::comma, "expected comma in inline asm expression") ||
2475 ParseToken(lltok::StringConstant, "expected constraint string"))
2476 return true;
2477 ID.StrVal2 = Lex.getStrVal();
2478 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1) |
2479 (unsigned(AsmDialect)<<2);
2480 ID.Kind = ValID::t_InlineAsm;
2481 return false;
2482 }
2483
2484 case lltok::kw_blockaddress: {
2485 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')'
2486 Lex.Lex();
2487
2488 ValID Fn, Label;
2489
2490 if (ParseToken(lltok::lparen, "expected '(' in block address expression") ||
2491 ParseValID(Fn) ||
2492 ParseToken(lltok::comma, "expected comma in block address expression")||
2493 ParseValID(Label) ||
2494 ParseToken(lltok::rparen, "expected ')' in block address expression"))
2495 return true;
2496
2497 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName)
2498 return Error(Fn.Loc, "expected function name in blockaddress");
2499 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName)
2500 return Error(Label.Loc, "expected basic block name in blockaddress");
2501
2502 // Try to find the function (but skip it if it's forward-referenced).
2503 GlobalValue *GV = nullptr;
2504 if (Fn.Kind == ValID::t_GlobalID) {
2505 if (Fn.UIntVal < NumberedVals.size())
2506 GV = NumberedVals[Fn.UIntVal];
2507 } else if (!ForwardRefVals.count(Fn.StrVal)) {
2508 GV = M->getNamedValue(Fn.StrVal);
2509 }
2510 Function *F = nullptr;
2511 if (GV) {
2512 // Confirm that it's actually a function with a definition.
2513 if (!isa<Function>(GV))
2514 return Error(Fn.Loc, "expected function name in blockaddress");
2515 F = cast<Function>(GV);
2516 if (F->isDeclaration())
2517 return Error(Fn.Loc, "cannot take blockaddress inside a declaration");
2518 }
2519
2520 if (!F) {
2521 // Make a global variable as a placeholder for this reference.
2522 GlobalValue *&FwdRef = ForwardRefBlockAddresses[Fn][Label];
2523 if (!FwdRef)
2524 FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), false,
2525 GlobalValue::InternalLinkage, nullptr, "");
2526 ID.ConstantVal = FwdRef;
2527 ID.Kind = ValID::t_Constant;
2528 return false;
2529 }
2530
2531 // We found the function; now find the basic block. Don't use PFS, since we
2532 // might be inside a constant expression.
2533 BasicBlock *BB;
2534 if (BlockAddressPFS && F == &BlockAddressPFS->getFunction()) {
2535 if (Label.Kind == ValID::t_LocalID)
2536 BB = BlockAddressPFS->GetBB(Label.UIntVal, Label.Loc);
2537 else
2538 BB = BlockAddressPFS->GetBB(Label.StrVal, Label.Loc);
2539 if (!BB)
2540 return Error(Label.Loc, "referenced value is not a basic block");
2541 } else {
2542 if (Label.Kind == ValID::t_LocalID)
2543 return Error(Label.Loc, "cannot take address of numeric label after "
2544 "the function is defined");
2545 BB = dyn_cast_or_null<BasicBlock>(
2546 F->getValueSymbolTable().lookup(Label.StrVal));
2547 if (!BB)
2548 return Error(Label.Loc, "referenced value is not a basic block");
2549 }
2550
2551 ID.ConstantVal = BlockAddress::get(F, BB);
2552 ID.Kind = ValID::t_Constant;
2553 return false;
2554 }
2555
2556 case lltok::kw_trunc:
2557 case lltok::kw_zext:
2558 case lltok::kw_sext:
2559 case lltok::kw_fptrunc:
2560 case lltok::kw_fpext:
2561 case lltok::kw_bitcast:
2562 case lltok::kw_addrspacecast:
2563 case lltok::kw_uitofp:
2564 case lltok::kw_sitofp:
2565 case lltok::kw_fptoui:
2566 case lltok::kw_fptosi:
2567 case lltok::kw_inttoptr:
2568 case lltok::kw_ptrtoint: {
2569 unsigned Opc = Lex.getUIntVal();
2570 Type *DestTy = nullptr;
2571 Constant *SrcVal;
2572 Lex.Lex();
2573 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") ||
2574 ParseGlobalTypeAndValue(SrcVal) ||
2575 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") ||
2576 ParseType(DestTy) ||
2577 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast"))
2578 return true;
2579 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy))
2580 return Error(ID.Loc, "invalid cast opcode for cast from '" +
2581 getTypeString(SrcVal->getType()) + "' to '" +
2582 getTypeString(DestTy) + "'");
2583 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc,
2584 SrcVal, DestTy);
2585 ID.Kind = ValID::t_Constant;
2586 return false;
2587 }
2588 case lltok::kw_extractvalue: {
2589 Lex.Lex();
2590 Constant *Val;
2591 SmallVector<unsigned, 4> Indices;
2592 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")||
2593 ParseGlobalTypeAndValue(Val) ||
2594 ParseIndexList(Indices) ||
2595 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr"))
2596 return true;
2597
2598 if (!Val->getType()->isAggregateType())
2599 return Error(ID.Loc, "extractvalue operand must be aggregate type");
2600 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices))
2601 return Error(ID.Loc, "invalid indices for extractvalue");
2602 ID.ConstantVal = ConstantExpr::getExtractValue(Val, Indices);
2603 ID.Kind = ValID::t_Constant;
2604 return false;
2605 }
2606 case lltok::kw_insertvalue: {
2607 Lex.Lex();
2608 Constant *Val0, *Val1;
2609 SmallVector<unsigned, 4> Indices;
2610 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")||
2611 ParseGlobalTypeAndValue(Val0) ||
2612 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")||
2613 ParseGlobalTypeAndValue(Val1) ||
2614 ParseIndexList(Indices) ||
2615 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr"))
2616 return true;
2617 if (!Val0->getType()->isAggregateType())
2618 return Error(ID.Loc, "insertvalue operand must be aggregate type");
2619 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices))
2620 return Error(ID.Loc, "invalid indices for insertvalue");
2621 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, Indices);
2622 ID.Kind = ValID::t_Constant;
2623 return false;
2624 }
2625 case lltok::kw_icmp:
2626 case lltok::kw_fcmp: {
2627 unsigned PredVal, Opc = Lex.getUIntVal();
2628 Constant *Val0, *Val1;
2629 Lex.Lex();
2630 if (ParseCmpPredicate(PredVal, Opc) ||
2631 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") ||
2632 ParseGlobalTypeAndValue(Val0) ||
2633 ParseToken(lltok::comma, "expected comma in compare constantexpr") ||
2634 ParseGlobalTypeAndValue(Val1) ||
2635 ParseToken(lltok::rparen, "expected ')' in compare constantexpr"))
2636 return true;
2637
2638 if (Val0->getType() != Val1->getType())
2639 return Error(ID.Loc, "compare operands must have the same type");
2640
2641 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal;
2642
2643 if (Opc == Instruction::FCmp) {
2644 if (!Val0->getType()->isFPOrFPVectorTy())
2645 return Error(ID.Loc, "fcmp requires floating point operands");
2646 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1);
2647 } else {
2648 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!");
2649 if (!Val0->getType()->isIntOrIntVectorTy() &&
2650 !Val0->getType()->getScalarType()->isPointerTy())
2651 return Error(ID.Loc, "icmp requires pointer or integer operands");
2652 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1);
2653 }
2654 ID.Kind = ValID::t_Constant;
2655 return false;
2656 }
2657
2658 // Binary Operators.
2659 case lltok::kw_add:
2660 case lltok::kw_fadd:
2661 case lltok::kw_sub:
2662 case lltok::kw_fsub:
2663 case lltok::kw_mul:
2664 case lltok::kw_fmul:
2665 case lltok::kw_udiv:
2666 case lltok::kw_sdiv:
2667 case lltok::kw_fdiv:
2668 case lltok::kw_urem:
2669 case lltok::kw_srem:
2670 case lltok::kw_frem:
2671 case lltok::kw_shl:
2672 case lltok::kw_lshr:
2673 case lltok::kw_ashr: {
2674 bool NUW = false;
2675 bool NSW = false;
2676 bool Exact = false;
2677 unsigned Opc = Lex.getUIntVal();
2678 Constant *Val0, *Val1;
2679 Lex.Lex();
2680 LocTy ModifierLoc = Lex.getLoc();
2681 if (Opc == Instruction::Add || Opc == Instruction::Sub ||
2682 Opc == Instruction::Mul || Opc == Instruction::Shl) {
2683 if (EatIfPresent(lltok::kw_nuw))
2684 NUW = true;
2685 if (EatIfPresent(lltok::kw_nsw)) {
2686 NSW = true;
2687 if (EatIfPresent(lltok::kw_nuw))
2688 NUW = true;
2689 }
2690 } else if (Opc == Instruction::SDiv || Opc == Instruction::UDiv ||
2691 Opc == Instruction::LShr || Opc == Instruction::AShr) {
2692 if (EatIfPresent(lltok::kw_exact))
2693 Exact = true;
2694 }
2695 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") ||
2696 ParseGlobalTypeAndValue(Val0) ||
2697 ParseToken(lltok::comma, "expected comma in binary constantexpr") ||
2698 ParseGlobalTypeAndValue(Val1) ||
2699 ParseToken(lltok::rparen, "expected ')' in binary constantexpr"))
2700 return true;
2701 if (Val0->getType() != Val1->getType())
2702 return Error(ID.Loc, "operands of constexpr must have same type");
2703 if (!Val0->getType()->isIntOrIntVectorTy()) {
2704 if (NUW)
2705 return Error(ModifierLoc, "nuw only applies to integer operations");
2706 if (NSW)
2707 return Error(ModifierLoc, "nsw only applies to integer operations");
2708 }
2709 // Check that the type is valid for the operator.
2710 switch (Opc) {
2711 case Instruction::Add:
2712 case Instruction::Sub:
2713 case Instruction::Mul:
2714 case Instruction::UDiv:
2715 case Instruction::SDiv:
2716 case Instruction::URem:
2717 case Instruction::SRem:
2718 case Instruction::Shl:
2719 case Instruction::AShr:
2720 case Instruction::LShr:
2721 if (!Val0->getType()->isIntOrIntVectorTy())
2722 return Error(ID.Loc, "constexpr requires integer operands");
2723 break;
2724 case Instruction::FAdd:
2725 case Instruction::FSub:
2726 case Instruction::FMul:
2727 case Instruction::FDiv:
2728 case Instruction::FRem:
2729 if (!Val0->getType()->isFPOrFPVectorTy())
2730 return Error(ID.Loc, "constexpr requires fp operands");
2731 break;
2732 default: llvm_unreachable("Unknown binary operator!");
2733 }
2734 unsigned Flags = 0;
2735 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
2736 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap;
2737 if (Exact) Flags |= PossiblyExactOperator::IsExact;
2738 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags);
2739 ID.ConstantVal = C;
2740 ID.Kind = ValID::t_Constant;
2741 return false;
2742 }
2743
2744 // Logical Operations
2745 case lltok::kw_and:
2746 case lltok::kw_or:
2747 case lltok::kw_xor: {
2748 unsigned Opc = Lex.getUIntVal();
2749 Constant *Val0, *Val1;
2750 Lex.Lex();
2751 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") ||
2752 ParseGlobalTypeAndValue(Val0) ||
2753 ParseToken(lltok::comma, "expected comma in logical constantexpr") ||
2754 ParseGlobalTypeAndValue(Val1) ||
2755 ParseToken(lltok::rparen, "expected ')' in logical constantexpr"))
2756 return true;
2757 if (Val0->getType() != Val1->getType())
2758 return Error(ID.Loc, "operands of constexpr must have same type");
2759 if (!Val0->getType()->isIntOrIntVectorTy())
2760 return Error(ID.Loc,
2761 "constexpr requires integer or integer vector operands");
2762 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1);
2763 ID.Kind = ValID::t_Constant;
2764 return false;
2765 }
2766
2767 case lltok::kw_getelementptr:
2768 case lltok::kw_shufflevector:
2769 case lltok::kw_insertelement:
2770 case lltok::kw_extractelement:
2771 case lltok::kw_select: {
2772 unsigned Opc = Lex.getUIntVal();
2773 SmallVector<Constant*, 16> Elts;
2774 bool InBounds = false;
2775 Lex.Lex();
2776 if (Opc == Instruction::GetElementPtr)
2777 InBounds = EatIfPresent(lltok::kw_inbounds);
2778 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") ||
2779 ParseGlobalValueVector(Elts) ||
2780 ParseToken(lltok::rparen, "expected ')' in constantexpr"))
2781 return true;
2782
2783 if (Opc == Instruction::GetElementPtr) {
2784 if (Elts.size() == 0 ||
2785 !Elts[0]->getType()->getScalarType()->isPointerTy())
2786 return Error(ID.Loc, "getelementptr requires pointer operand");
2787
2788 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
2789 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), Indices))
2790 return Error(ID.Loc, "invalid indices for getelementptr");
2791 ID.ConstantVal = ConstantExpr::getGetElementPtr(Elts[0], Indices,
2792 InBounds);
2793 } else if (Opc == Instruction::Select) {
2794 if (Elts.size() != 3)
2795 return Error(ID.Loc, "expected three operands to select");
2796 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1],
2797 Elts[2]))
2798 return Error(ID.Loc, Reason);
2799 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]);
2800 } else if (Opc == Instruction::ShuffleVector) {
2801 if (Elts.size() != 3)
2802 return Error(ID.Loc, "expected three operands to shufflevector");
2803 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2]))
2804 return Error(ID.Loc, "invalid operands to shufflevector");
2805 ID.ConstantVal =
2806 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]);
2807 } else if (Opc == Instruction::ExtractElement) {
2808 if (Elts.size() != 2)
2809 return Error(ID.Loc, "expected two operands to extractelement");
2810 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1]))
2811 return Error(ID.Loc, "invalid extractelement operands");
2812 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]);
2813 } else {
2814 assert(Opc == Instruction::InsertElement && "Unknown opcode");
2815 if (Elts.size() != 3)
2816 return Error(ID.Loc, "expected three operands to insertelement");
2817 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2]))
2818 return Error(ID.Loc, "invalid insertelement operands");
2819 ID.ConstantVal =
2820 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]);
2821 }
2822
2823 ID.Kind = ValID::t_Constant;
2824 return false;
2825 }
2826 }
2827
2828 Lex.Lex();
2829 return false;
2830 }
2831
2832 /// ParseGlobalValue - Parse a global value with the specified type.
ParseGlobalValue(Type * Ty,Constant * & C)2833 bool LLParser::ParseGlobalValue(Type *Ty, Constant *&C) {
2834 C = nullptr;
2835 ValID ID;
2836 Value *V = nullptr;
2837 bool Parsed = ParseValID(ID) ||
2838 ConvertValIDToValue(Ty, ID, V, nullptr);
2839 if (V && !(C = dyn_cast<Constant>(V)))
2840 return Error(ID.Loc, "global values must be constants");
2841 return Parsed;
2842 }
2843
ParseGlobalTypeAndValue(Constant * & V)2844 bool LLParser::ParseGlobalTypeAndValue(Constant *&V) {
2845 Type *Ty = nullptr;
2846 return ParseType(Ty) ||
2847 ParseGlobalValue(Ty, V);
2848 }
2849
parseOptionalComdat(StringRef GlobalName,Comdat * & C)2850 bool LLParser::parseOptionalComdat(StringRef GlobalName, Comdat *&C) {
2851 C = nullptr;
2852
2853 LocTy KwLoc = Lex.getLoc();
2854 if (!EatIfPresent(lltok::kw_comdat))
2855 return false;
2856
2857 if (EatIfPresent(lltok::lparen)) {
2858 if (Lex.getKind() != lltok::ComdatVar)
2859 return TokError("expected comdat variable");
2860 C = getComdat(Lex.getStrVal(), Lex.getLoc());
2861 Lex.Lex();
2862 if (ParseToken(lltok::rparen, "expected ')' after comdat var"))
2863 return true;
2864 } else {
2865 if (GlobalName.empty())
2866 return TokError("comdat cannot be unnamed");
2867 C = getComdat(GlobalName, KwLoc);
2868 }
2869
2870 return false;
2871 }
2872
2873 /// ParseGlobalValueVector
2874 /// ::= /*empty*/
2875 /// ::= TypeAndValue (',' TypeAndValue)*
ParseGlobalValueVector(SmallVectorImpl<Constant * > & Elts)2876 bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant *> &Elts) {
2877 // Empty list.
2878 if (Lex.getKind() == lltok::rbrace ||
2879 Lex.getKind() == lltok::rsquare ||
2880 Lex.getKind() == lltok::greater ||
2881 Lex.getKind() == lltok::rparen)
2882 return false;
2883
2884 Constant *C;
2885 if (ParseGlobalTypeAndValue(C)) return true;
2886 Elts.push_back(C);
2887
2888 while (EatIfPresent(lltok::comma)) {
2889 if (ParseGlobalTypeAndValue(C)) return true;
2890 Elts.push_back(C);
2891 }
2892
2893 return false;
2894 }
2895
ParseMDTuple(MDNode * & MD,bool IsDistinct)2896 bool LLParser::ParseMDTuple(MDNode *&MD, bool IsDistinct) {
2897 SmallVector<Metadata *, 16> Elts;
2898 if (ParseMDNodeVector(Elts))
2899 return true;
2900
2901 MD = (IsDistinct ? MDTuple::getDistinct : MDTuple::get)(Context, Elts);
2902 return false;
2903 }
2904
2905 /// MDNode:
2906 /// ::= !{ ... }
2907 /// ::= !7
2908 /// ::= !MDLocation(...)
ParseMDNode(MDNode * & N)2909 bool LLParser::ParseMDNode(MDNode *&N) {
2910 if (Lex.getKind() == lltok::MetadataVar)
2911 return ParseSpecializedMDNode(N);
2912
2913 return ParseToken(lltok::exclaim, "expected '!' here") ||
2914 ParseMDNodeTail(N);
2915 }
2916
ParseMDNodeTail(MDNode * & N)2917 bool LLParser::ParseMDNodeTail(MDNode *&N) {
2918 // !{ ... }
2919 if (Lex.getKind() == lltok::lbrace)
2920 return ParseMDTuple(N);
2921
2922 // !42
2923 return ParseMDNodeID(N);
2924 }
2925
ParseMDField(LocTy Loc,StringRef Name,MDUnsignedField<uint32_t> & Result)2926 bool LLParser::ParseMDField(LocTy Loc, StringRef Name,
2927 MDUnsignedField<uint32_t> &Result) {
2928 if (Result.Seen)
2929 return Error(Loc,
2930 "field '" + Name + "' cannot be specified more than once");
2931
2932 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned())
2933 return TokError("expected unsigned integer");
2934 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(Result.Max + 1ull);
2935
2936 if (Val64 > Result.Max)
2937 return TokError("value for '" + Name + "' too large, limit is " +
2938 Twine(Result.Max));
2939 Result.assign(Val64);
2940 Lex.Lex();
2941 return false;
2942 }
2943
ParseMDField(LocTy Loc,StringRef Name,MDField & Result)2944 bool LLParser::ParseMDField(LocTy Loc, StringRef Name, MDField &Result) {
2945 if (Result.Seen)
2946 return Error(Loc,
2947 "field '" + Name + "' cannot be specified more than once");
2948
2949 Metadata *MD;
2950 if (ParseMetadata(MD, nullptr))
2951 return true;
2952
2953 Result.assign(MD);
2954 return false;
2955 }
2956
2957 template <class ParserTy>
ParseMDFieldsImpl(ParserTy parseField)2958 bool LLParser::ParseMDFieldsImpl(ParserTy parseField) {
2959 assert(Lex.getKind() == lltok::MetadataVar && "Expected metadata type name");
2960 Lex.Lex();
2961
2962 if (ParseToken(lltok::lparen, "expected '(' here"))
2963 return true;
2964 if (EatIfPresent(lltok::rparen))
2965 return false;
2966
2967 do {
2968 if (Lex.getKind() != lltok::LabelStr)
2969 return TokError("expected field label here");
2970
2971 if (parseField())
2972 return true;
2973 } while (EatIfPresent(lltok::comma));
2974
2975 return ParseToken(lltok::rparen, "expected ')' here");
2976 }
2977
ParseSpecializedMDNode(MDNode * & N,bool IsDistinct)2978 bool LLParser::ParseSpecializedMDNode(MDNode *&N, bool IsDistinct) {
2979 assert(Lex.getKind() == lltok::MetadataVar && "Expected metadata type name");
2980 #define DISPATCH_TO_PARSER(CLASS) \
2981 if (Lex.getStrVal() == #CLASS) \
2982 return Parse##CLASS(N, IsDistinct);
2983
2984 DISPATCH_TO_PARSER(MDLocation);
2985 #undef DISPATCH_TO_PARSER
2986
2987 return TokError("expected metadata type");
2988 }
2989
2990 #define PARSE_MD_FIELD(NAME) \
2991 do { \
2992 if (Lex.getStrVal() == #NAME) { \
2993 LocTy Loc = Lex.getLoc(); \
2994 Lex.Lex(); \
2995 if (ParseMDField(Loc, #NAME, NAME)) \
2996 return true; \
2997 return false; \
2998 } \
2999 } while (0)
3000
3001 /// ParseMDLocationFields:
3002 /// ::= !MDLocation(line: 43, column: 8, scope: !5, inlinedAt: !6)
ParseMDLocation(MDNode * & Result,bool IsDistinct)3003 bool LLParser::ParseMDLocation(MDNode *&Result, bool IsDistinct) {
3004 MDUnsignedField<uint32_t> line(0, ~0u >> 8);
3005 MDUnsignedField<uint32_t> column(0, ~0u >> 24);
3006 MDField scope;
3007 MDField inlinedAt;
3008 if (ParseMDFieldsImpl([&]() -> bool {
3009 PARSE_MD_FIELD(line);
3010 PARSE_MD_FIELD(column);
3011 PARSE_MD_FIELD(scope);
3012 PARSE_MD_FIELD(inlinedAt);
3013 return TokError(Twine("invalid field '") + Lex.getStrVal() + "'");
3014 }))
3015 return true;
3016
3017 if (!scope.Seen)
3018 return TokError("missing required field 'scope'");
3019
3020 auto get = (IsDistinct ? MDLocation::getDistinct : MDLocation::get);
3021 Result = get(Context, line.Val, column.Val, scope.Val, inlinedAt.Val);
3022 return false;
3023 }
3024 #undef PARSE_MD_FIELD
3025
3026 /// ParseMetadataAsValue
3027 /// ::= metadata i32 %local
3028 /// ::= metadata i32 @global
3029 /// ::= metadata i32 7
3030 /// ::= metadata !0
3031 /// ::= metadata !{...}
3032 /// ::= metadata !"string"
ParseMetadataAsValue(Value * & V,PerFunctionState & PFS)3033 bool LLParser::ParseMetadataAsValue(Value *&V, PerFunctionState &PFS) {
3034 // Note: the type 'metadata' has already been parsed.
3035 Metadata *MD;
3036 if (ParseMetadata(MD, &PFS))
3037 return true;
3038
3039 V = MetadataAsValue::get(Context, MD);
3040 return false;
3041 }
3042
3043 /// ParseValueAsMetadata
3044 /// ::= i32 %local
3045 /// ::= i32 @global
3046 /// ::= i32 7
ParseValueAsMetadata(Metadata * & MD,PerFunctionState * PFS)3047 bool LLParser::ParseValueAsMetadata(Metadata *&MD, PerFunctionState *PFS) {
3048 Type *Ty;
3049 LocTy Loc;
3050 if (ParseType(Ty, "expected metadata operand", Loc))
3051 return true;
3052 if (Ty->isMetadataTy())
3053 return Error(Loc, "invalid metadata-value-metadata roundtrip");
3054
3055 Value *V;
3056 if (ParseValue(Ty, V, PFS))
3057 return true;
3058
3059 MD = ValueAsMetadata::get(V);
3060 return false;
3061 }
3062
3063 /// ParseMetadata
3064 /// ::= i32 %local
3065 /// ::= i32 @global
3066 /// ::= i32 7
3067 /// ::= !42
3068 /// ::= !{...}
3069 /// ::= !"string"
3070 /// ::= !MDLocation(...)
ParseMetadata(Metadata * & MD,PerFunctionState * PFS)3071 bool LLParser::ParseMetadata(Metadata *&MD, PerFunctionState *PFS) {
3072 if (Lex.getKind() == lltok::MetadataVar) {
3073 MDNode *N;
3074 if (ParseSpecializedMDNode(N))
3075 return true;
3076 MD = N;
3077 return false;
3078 }
3079
3080 // ValueAsMetadata:
3081 // <type> <value>
3082 if (Lex.getKind() != lltok::exclaim)
3083 return ParseValueAsMetadata(MD, PFS);
3084
3085 // '!'.
3086 assert(Lex.getKind() == lltok::exclaim && "Expected '!' here");
3087 Lex.Lex();
3088
3089 // MDString:
3090 // ::= '!' STRINGCONSTANT
3091 if (Lex.getKind() == lltok::StringConstant) {
3092 MDString *S;
3093 if (ParseMDString(S))
3094 return true;
3095 MD = S;
3096 return false;
3097 }
3098
3099 // MDNode:
3100 // !{ ... }
3101 // !7
3102 MDNode *N;
3103 if (ParseMDNodeTail(N))
3104 return true;
3105 MD = N;
3106 return false;
3107 }
3108
3109
3110 //===----------------------------------------------------------------------===//
3111 // Function Parsing.
3112 //===----------------------------------------------------------------------===//
3113
ConvertValIDToValue(Type * Ty,ValID & ID,Value * & V,PerFunctionState * PFS)3114 bool LLParser::ConvertValIDToValue(Type *Ty, ValID &ID, Value *&V,
3115 PerFunctionState *PFS) {
3116 if (Ty->isFunctionTy())
3117 return Error(ID.Loc, "functions are not values, refer to them as pointers");
3118
3119 switch (ID.Kind) {
3120 case ValID::t_LocalID:
3121 if (!PFS) return Error(ID.Loc, "invalid use of function-local name");
3122 V = PFS->GetVal(ID.UIntVal, Ty, ID.Loc);
3123 return V == nullptr;
3124 case ValID::t_LocalName:
3125 if (!PFS) return Error(ID.Loc, "invalid use of function-local name");
3126 V = PFS->GetVal(ID.StrVal, Ty, ID.Loc);
3127 return V == nullptr;
3128 case ValID::t_InlineAsm: {
3129 PointerType *PTy = dyn_cast<PointerType>(Ty);
3130 FunctionType *FTy =
3131 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : nullptr;
3132 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2))
3133 return Error(ID.Loc, "invalid type for inline asm constraint string");
3134 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1,
3135 (ID.UIntVal>>1)&1, (InlineAsm::AsmDialect(ID.UIntVal>>2)));
3136 return false;
3137 }
3138 case ValID::t_GlobalName:
3139 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc);
3140 return V == nullptr;
3141 case ValID::t_GlobalID:
3142 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc);
3143 return V == nullptr;
3144 case ValID::t_APSInt:
3145 if (!Ty->isIntegerTy())
3146 return Error(ID.Loc, "integer constant must have integer type");
3147 ID.APSIntVal = ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits());
3148 V = ConstantInt::get(Context, ID.APSIntVal);
3149 return false;
3150 case ValID::t_APFloat:
3151 if (!Ty->isFloatingPointTy() ||
3152 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal))
3153 return Error(ID.Loc, "floating point constant invalid for type");
3154
3155 // The lexer has no type info, so builds all half, float, and double FP
3156 // constants as double. Fix this here. Long double does not need this.
3157 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble) {
3158 bool Ignored;
3159 if (Ty->isHalfTy())
3160 ID.APFloatVal.convert(APFloat::IEEEhalf, APFloat::rmNearestTiesToEven,
3161 &Ignored);
3162 else if (Ty->isFloatTy())
3163 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven,
3164 &Ignored);
3165 }
3166 V = ConstantFP::get(Context, ID.APFloatVal);
3167
3168 if (V->getType() != Ty)
3169 return Error(ID.Loc, "floating point constant does not have type '" +
3170 getTypeString(Ty) + "'");
3171
3172 return false;
3173 case ValID::t_Null:
3174 if (!Ty->isPointerTy())
3175 return Error(ID.Loc, "null must be a pointer type");
3176 V = ConstantPointerNull::get(cast<PointerType>(Ty));
3177 return false;
3178 case ValID::t_Undef:
3179 // FIXME: LabelTy should not be a first-class type.
3180 if (!Ty->isFirstClassType() || Ty->isLabelTy())
3181 return Error(ID.Loc, "invalid type for undef constant");
3182 V = UndefValue::get(Ty);
3183 return false;
3184 case ValID::t_EmptyArray:
3185 if (!Ty->isArrayTy() || cast<ArrayType>(Ty)->getNumElements() != 0)
3186 return Error(ID.Loc, "invalid empty array initializer");
3187 V = UndefValue::get(Ty);
3188 return false;
3189 case ValID::t_Zero:
3190 // FIXME: LabelTy should not be a first-class type.
3191 if (!Ty->isFirstClassType() || Ty->isLabelTy())
3192 return Error(ID.Loc, "invalid type for null constant");
3193 V = Constant::getNullValue(Ty);
3194 return false;
3195 case ValID::t_Constant:
3196 if (ID.ConstantVal->getType() != Ty)
3197 return Error(ID.Loc, "constant expression type mismatch");
3198
3199 V = ID.ConstantVal;
3200 return false;
3201 case ValID::t_ConstantStruct:
3202 case ValID::t_PackedConstantStruct:
3203 if (StructType *ST = dyn_cast<StructType>(Ty)) {
3204 if (ST->getNumElements() != ID.UIntVal)
3205 return Error(ID.Loc,
3206 "initializer with struct type has wrong # elements");
3207 if (ST->isPacked() != (ID.Kind == ValID::t_PackedConstantStruct))
3208 return Error(ID.Loc, "packed'ness of initializer and type don't match");
3209
3210 // Verify that the elements are compatible with the structtype.
3211 for (unsigned i = 0, e = ID.UIntVal; i != e; ++i)
3212 if (ID.ConstantStructElts[i]->getType() != ST->getElementType(i))
3213 return Error(ID.Loc, "element " + Twine(i) +
3214 " of struct initializer doesn't match struct element type");
3215
3216 V = ConstantStruct::get(ST, makeArrayRef(ID.ConstantStructElts,
3217 ID.UIntVal));
3218 } else
3219 return Error(ID.Loc, "constant expression type mismatch");
3220 return false;
3221 }
3222 llvm_unreachable("Invalid ValID");
3223 }
3224
ParseValue(Type * Ty,Value * & V,PerFunctionState * PFS)3225 bool LLParser::ParseValue(Type *Ty, Value *&V, PerFunctionState *PFS) {
3226 V = nullptr;
3227 ValID ID;
3228 return ParseValID(ID, PFS) ||
3229 ConvertValIDToValue(Ty, ID, V, PFS);
3230 }
3231
ParseTypeAndValue(Value * & V,PerFunctionState * PFS)3232 bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState *PFS) {
3233 Type *Ty = nullptr;
3234 return ParseType(Ty) ||
3235 ParseValue(Ty, V, PFS);
3236 }
3237
ParseTypeAndBasicBlock(BasicBlock * & BB,LocTy & Loc,PerFunctionState & PFS)3238 bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc,
3239 PerFunctionState &PFS) {
3240 Value *V;
3241 Loc = Lex.getLoc();
3242 if (ParseTypeAndValue(V, PFS)) return true;
3243 if (!isa<BasicBlock>(V))
3244 return Error(Loc, "expected a basic block");
3245 BB = cast<BasicBlock>(V);
3246 return false;
3247 }
3248
3249
3250 /// FunctionHeader
3251 /// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs
3252 /// OptUnnamedAddr Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection
3253 /// OptionalAlign OptGC OptionalPrefix OptionalPrologue
ParseFunctionHeader(Function * & Fn,bool isDefine)3254 bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) {
3255 // Parse the linkage.
3256 LocTy LinkageLoc = Lex.getLoc();
3257 unsigned Linkage;
3258
3259 unsigned Visibility;
3260 unsigned DLLStorageClass;
3261 AttrBuilder RetAttrs;
3262 unsigned CC;
3263 Type *RetType = nullptr;
3264 LocTy RetTypeLoc = Lex.getLoc();
3265 if (ParseOptionalLinkage(Linkage) ||
3266 ParseOptionalVisibility(Visibility) ||
3267 ParseOptionalDLLStorageClass(DLLStorageClass) ||
3268 ParseOptionalCallingConv(CC) ||
3269 ParseOptionalReturnAttrs(RetAttrs) ||
3270 ParseType(RetType, RetTypeLoc, true /*void allowed*/))
3271 return true;
3272
3273 // Verify that the linkage is ok.
3274 switch ((GlobalValue::LinkageTypes)Linkage) {
3275 case GlobalValue::ExternalLinkage:
3276 break; // always ok.
3277 case GlobalValue::ExternalWeakLinkage:
3278 if (isDefine)
3279 return Error(LinkageLoc, "invalid linkage for function definition");
3280 break;
3281 case GlobalValue::PrivateLinkage:
3282 case GlobalValue::InternalLinkage:
3283 case GlobalValue::AvailableExternallyLinkage:
3284 case GlobalValue::LinkOnceAnyLinkage:
3285 case GlobalValue::LinkOnceODRLinkage:
3286 case GlobalValue::WeakAnyLinkage:
3287 case GlobalValue::WeakODRLinkage:
3288 if (!isDefine)
3289 return Error(LinkageLoc, "invalid linkage for function declaration");
3290 break;
3291 case GlobalValue::AppendingLinkage:
3292 case GlobalValue::CommonLinkage:
3293 return Error(LinkageLoc, "invalid function linkage type");
3294 }
3295
3296 if (!isValidVisibilityForLinkage(Visibility, Linkage))
3297 return Error(LinkageLoc,
3298 "symbol with local linkage must have default visibility");
3299
3300 if (!FunctionType::isValidReturnType(RetType))
3301 return Error(RetTypeLoc, "invalid function return type");
3302
3303 LocTy NameLoc = Lex.getLoc();
3304
3305 std::string FunctionName;
3306 if (Lex.getKind() == lltok::GlobalVar) {
3307 FunctionName = Lex.getStrVal();
3308 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok.
3309 unsigned NameID = Lex.getUIntVal();
3310
3311 if (NameID != NumberedVals.size())
3312 return TokError("function expected to be numbered '%" +
3313 Twine(NumberedVals.size()) + "'");
3314 } else {
3315 return TokError("expected function name");
3316 }
3317
3318 Lex.Lex();
3319
3320 if (Lex.getKind() != lltok::lparen)
3321 return TokError("expected '(' in function argument list");
3322
3323 SmallVector<ArgInfo, 8> ArgList;
3324 bool isVarArg;
3325 AttrBuilder FuncAttrs;
3326 std::vector<unsigned> FwdRefAttrGrps;
3327 LocTy BuiltinLoc;
3328 std::string Section;
3329 unsigned Alignment;
3330 std::string GC;
3331 bool UnnamedAddr;
3332 LocTy UnnamedAddrLoc;
3333 Constant *Prefix = nullptr;
3334 Constant *Prologue = nullptr;
3335 Comdat *C;
3336
3337 if (ParseArgumentList(ArgList, isVarArg) ||
3338 ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr,
3339 &UnnamedAddrLoc) ||
3340 ParseFnAttributeValuePairs(FuncAttrs, FwdRefAttrGrps, false,
3341 BuiltinLoc) ||
3342 (EatIfPresent(lltok::kw_section) &&
3343 ParseStringConstant(Section)) ||
3344 parseOptionalComdat(FunctionName, C) ||
3345 ParseOptionalAlignment(Alignment) ||
3346 (EatIfPresent(lltok::kw_gc) &&
3347 ParseStringConstant(GC)) ||
3348 (EatIfPresent(lltok::kw_prefix) &&
3349 ParseGlobalTypeAndValue(Prefix)) ||
3350 (EatIfPresent(lltok::kw_prologue) &&
3351 ParseGlobalTypeAndValue(Prologue)))
3352 return true;
3353
3354 if (FuncAttrs.contains(Attribute::Builtin))
3355 return Error(BuiltinLoc, "'builtin' attribute not valid on function");
3356
3357 // If the alignment was parsed as an attribute, move to the alignment field.
3358 if (FuncAttrs.hasAlignmentAttr()) {
3359 Alignment = FuncAttrs.getAlignment();
3360 FuncAttrs.removeAttribute(Attribute::Alignment);
3361 }
3362
3363 // Okay, if we got here, the function is syntactically valid. Convert types
3364 // and do semantic checks.
3365 std::vector<Type*> ParamTypeList;
3366 SmallVector<AttributeSet, 8> Attrs;
3367
3368 if (RetAttrs.hasAttributes())
3369 Attrs.push_back(AttributeSet::get(RetType->getContext(),
3370 AttributeSet::ReturnIndex,
3371 RetAttrs));
3372
3373 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
3374 ParamTypeList.push_back(ArgList[i].Ty);
3375 if (ArgList[i].Attrs.hasAttributes(i + 1)) {
3376 AttrBuilder B(ArgList[i].Attrs, i + 1);
3377 Attrs.push_back(AttributeSet::get(RetType->getContext(), i + 1, B));
3378 }
3379 }
3380
3381 if (FuncAttrs.hasAttributes())
3382 Attrs.push_back(AttributeSet::get(RetType->getContext(),
3383 AttributeSet::FunctionIndex,
3384 FuncAttrs));
3385
3386 AttributeSet PAL = AttributeSet::get(Context, Attrs);
3387
3388 if (PAL.hasAttribute(1, Attribute::StructRet) && !RetType->isVoidTy())
3389 return Error(RetTypeLoc, "functions with 'sret' argument must return void");
3390
3391 FunctionType *FT =
3392 FunctionType::get(RetType, ParamTypeList, isVarArg);
3393 PointerType *PFT = PointerType::getUnqual(FT);
3394
3395 Fn = nullptr;
3396 if (!FunctionName.empty()) {
3397 // If this was a definition of a forward reference, remove the definition
3398 // from the forward reference table and fill in the forward ref.
3399 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI =
3400 ForwardRefVals.find(FunctionName);
3401 if (FRVI != ForwardRefVals.end()) {
3402 Fn = M->getFunction(FunctionName);
3403 if (!Fn)
3404 return Error(FRVI->second.second, "invalid forward reference to "
3405 "function as global value!");
3406 if (Fn->getType() != PFT)
3407 return Error(FRVI->second.second, "invalid forward reference to "
3408 "function '" + FunctionName + "' with wrong type!");
3409
3410 ForwardRefVals.erase(FRVI);
3411 } else if ((Fn = M->getFunction(FunctionName))) {
3412 // Reject redefinitions.
3413 return Error(NameLoc, "invalid redefinition of function '" +
3414 FunctionName + "'");
3415 } else if (M->getNamedValue(FunctionName)) {
3416 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'");
3417 }
3418
3419 } else {
3420 // If this is a definition of a forward referenced function, make sure the
3421 // types agree.
3422 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I
3423 = ForwardRefValIDs.find(NumberedVals.size());
3424 if (I != ForwardRefValIDs.end()) {
3425 Fn = cast<Function>(I->second.first);
3426 if (Fn->getType() != PFT)
3427 return Error(NameLoc, "type of definition and forward reference of '@" +
3428 Twine(NumberedVals.size()) + "' disagree");
3429 ForwardRefValIDs.erase(I);
3430 }
3431 }
3432
3433 if (!Fn)
3434 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M);
3435 else // Move the forward-reference to the correct spot in the module.
3436 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn);
3437
3438 if (FunctionName.empty())
3439 NumberedVals.push_back(Fn);
3440
3441 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage);
3442 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility);
3443 Fn->setDLLStorageClass((GlobalValue::DLLStorageClassTypes)DLLStorageClass);
3444 Fn->setCallingConv(CC);
3445 Fn->setAttributes(PAL);
3446 Fn->setUnnamedAddr(UnnamedAddr);
3447 Fn->setAlignment(Alignment);
3448 Fn->setSection(Section);
3449 Fn->setComdat(C);
3450 if (!GC.empty()) Fn->setGC(GC.c_str());
3451 Fn->setPrefixData(Prefix);
3452 Fn->setPrologueData(Prologue);
3453 ForwardRefAttrGroups[Fn] = FwdRefAttrGrps;
3454
3455 // Add all of the arguments we parsed to the function.
3456 Function::arg_iterator ArgIt = Fn->arg_begin();
3457 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) {
3458 // If the argument has a name, insert it into the argument symbol table.
3459 if (ArgList[i].Name.empty()) continue;
3460
3461 // Set the name, if it conflicted, it will be auto-renamed.
3462 ArgIt->setName(ArgList[i].Name);
3463
3464 if (ArgIt->getName() != ArgList[i].Name)
3465 return Error(ArgList[i].Loc, "redefinition of argument '%" +
3466 ArgList[i].Name + "'");
3467 }
3468
3469 if (isDefine)
3470 return false;
3471
3472 // Check the declaration has no block address forward references.
3473 ValID ID;
3474 if (FunctionName.empty()) {
3475 ID.Kind = ValID::t_GlobalID;
3476 ID.UIntVal = NumberedVals.size() - 1;
3477 } else {
3478 ID.Kind = ValID::t_GlobalName;
3479 ID.StrVal = FunctionName;
3480 }
3481 auto Blocks = ForwardRefBlockAddresses.find(ID);
3482 if (Blocks != ForwardRefBlockAddresses.end())
3483 return Error(Blocks->first.Loc,
3484 "cannot take blockaddress inside a declaration");
3485 return false;
3486 }
3487
resolveForwardRefBlockAddresses()3488 bool LLParser::PerFunctionState::resolveForwardRefBlockAddresses() {
3489 ValID ID;
3490 if (FunctionNumber == -1) {
3491 ID.Kind = ValID::t_GlobalName;
3492 ID.StrVal = F.getName();
3493 } else {
3494 ID.Kind = ValID::t_GlobalID;
3495 ID.UIntVal = FunctionNumber;
3496 }
3497
3498 auto Blocks = P.ForwardRefBlockAddresses.find(ID);
3499 if (Blocks == P.ForwardRefBlockAddresses.end())
3500 return false;
3501
3502 for (const auto &I : Blocks->second) {
3503 const ValID &BBID = I.first;
3504 GlobalValue *GV = I.second;
3505
3506 assert((BBID.Kind == ValID::t_LocalID || BBID.Kind == ValID::t_LocalName) &&
3507 "Expected local id or name");
3508 BasicBlock *BB;
3509 if (BBID.Kind == ValID::t_LocalName)
3510 BB = GetBB(BBID.StrVal, BBID.Loc);
3511 else
3512 BB = GetBB(BBID.UIntVal, BBID.Loc);
3513 if (!BB)
3514 return P.Error(BBID.Loc, "referenced value is not a basic block");
3515
3516 GV->replaceAllUsesWith(BlockAddress::get(&F, BB));
3517 GV->eraseFromParent();
3518 }
3519
3520 P.ForwardRefBlockAddresses.erase(Blocks);
3521 return false;
3522 }
3523
3524 /// ParseFunctionBody
3525 /// ::= '{' BasicBlock+ UseListOrderDirective* '}'
ParseFunctionBody(Function & Fn)3526 bool LLParser::ParseFunctionBody(Function &Fn) {
3527 if (Lex.getKind() != lltok::lbrace)
3528 return TokError("expected '{' in function body");
3529 Lex.Lex(); // eat the {.
3530
3531 int FunctionNumber = -1;
3532 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1;
3533
3534 PerFunctionState PFS(*this, Fn, FunctionNumber);
3535
3536 // Resolve block addresses and allow basic blocks to be forward-declared
3537 // within this function.
3538 if (PFS.resolveForwardRefBlockAddresses())
3539 return true;
3540 SaveAndRestore<PerFunctionState *> ScopeExit(BlockAddressPFS, &PFS);
3541
3542 // We need at least one basic block.
3543 if (Lex.getKind() == lltok::rbrace || Lex.getKind() == lltok::kw_uselistorder)
3544 return TokError("function body requires at least one basic block");
3545
3546 while (Lex.getKind() != lltok::rbrace &&
3547 Lex.getKind() != lltok::kw_uselistorder)
3548 if (ParseBasicBlock(PFS)) return true;
3549
3550 while (Lex.getKind() != lltok::rbrace)
3551 if (ParseUseListOrder(&PFS))
3552 return true;
3553
3554 // Eat the }.
3555 Lex.Lex();
3556
3557 // Verify function is ok.
3558 return PFS.FinishFunction();
3559 }
3560
3561 /// ParseBasicBlock
3562 /// ::= LabelStr? Instruction*
ParseBasicBlock(PerFunctionState & PFS)3563 bool LLParser::ParseBasicBlock(PerFunctionState &PFS) {
3564 // If this basic block starts out with a name, remember it.
3565 std::string Name;
3566 LocTy NameLoc = Lex.getLoc();
3567 if (Lex.getKind() == lltok::LabelStr) {
3568 Name = Lex.getStrVal();
3569 Lex.Lex();
3570 }
3571
3572 BasicBlock *BB = PFS.DefineBB(Name, NameLoc);
3573 if (!BB) return true;
3574
3575 std::string NameStr;
3576
3577 // Parse the instructions in this block until we get a terminator.
3578 Instruction *Inst;
3579 do {
3580 // This instruction may have three possibilities for a name: a) none
3581 // specified, b) name specified "%foo =", c) number specified: "%4 =".
3582 LocTy NameLoc = Lex.getLoc();
3583 int NameID = -1;
3584 NameStr = "";
3585
3586 if (Lex.getKind() == lltok::LocalVarID) {
3587 NameID = Lex.getUIntVal();
3588 Lex.Lex();
3589 if (ParseToken(lltok::equal, "expected '=' after instruction id"))
3590 return true;
3591 } else if (Lex.getKind() == lltok::LocalVar) {
3592 NameStr = Lex.getStrVal();
3593 Lex.Lex();
3594 if (ParseToken(lltok::equal, "expected '=' after instruction name"))
3595 return true;
3596 }
3597
3598 switch (ParseInstruction(Inst, BB, PFS)) {
3599 default: llvm_unreachable("Unknown ParseInstruction result!");
3600 case InstError: return true;
3601 case InstNormal:
3602 BB->getInstList().push_back(Inst);
3603
3604 // With a normal result, we check to see if the instruction is followed by
3605 // a comma and metadata.
3606 if (EatIfPresent(lltok::comma))
3607 if (ParseInstructionMetadata(Inst, &PFS))
3608 return true;
3609 break;
3610 case InstExtraComma:
3611 BB->getInstList().push_back(Inst);
3612
3613 // If the instruction parser ate an extra comma at the end of it, it
3614 // *must* be followed by metadata.
3615 if (ParseInstructionMetadata(Inst, &PFS))
3616 return true;
3617 break;
3618 }
3619
3620 // Set the name on the instruction.
3621 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true;
3622 } while (!isa<TerminatorInst>(Inst));
3623
3624 return false;
3625 }
3626
3627 //===----------------------------------------------------------------------===//
3628 // Instruction Parsing.
3629 //===----------------------------------------------------------------------===//
3630
3631 /// ParseInstruction - Parse one of the many different instructions.
3632 ///
ParseInstruction(Instruction * & Inst,BasicBlock * BB,PerFunctionState & PFS)3633 int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB,
3634 PerFunctionState &PFS) {
3635 lltok::Kind Token = Lex.getKind();
3636 if (Token == lltok::Eof)
3637 return TokError("found end of file when expecting more instructions");
3638 LocTy Loc = Lex.getLoc();
3639 unsigned KeywordVal = Lex.getUIntVal();
3640 Lex.Lex(); // Eat the keyword.
3641
3642 switch (Token) {
3643 default: return Error(Loc, "expected instruction opcode");
3644 // Terminator Instructions.
3645 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false;
3646 case lltok::kw_ret: return ParseRet(Inst, BB, PFS);
3647 case lltok::kw_br: return ParseBr(Inst, PFS);
3648 case lltok::kw_switch: return ParseSwitch(Inst, PFS);
3649 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS);
3650 case lltok::kw_invoke: return ParseInvoke(Inst, PFS);
3651 case lltok::kw_resume: return ParseResume(Inst, PFS);
3652 // Binary Operators.
3653 case lltok::kw_add:
3654 case lltok::kw_sub:
3655 case lltok::kw_mul:
3656 case lltok::kw_shl: {
3657 bool NUW = EatIfPresent(lltok::kw_nuw);
3658 bool NSW = EatIfPresent(lltok::kw_nsw);
3659 if (!NUW) NUW = EatIfPresent(lltok::kw_nuw);
3660
3661 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true;
3662
3663 if (NUW) cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true);
3664 if (NSW) cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true);
3665 return false;
3666 }
3667 case lltok::kw_fadd:
3668 case lltok::kw_fsub:
3669 case lltok::kw_fmul:
3670 case lltok::kw_fdiv:
3671 case lltok::kw_frem: {
3672 FastMathFlags FMF = EatFastMathFlagsIfPresent();
3673 int Res = ParseArithmetic(Inst, PFS, KeywordVal, 2);
3674 if (Res != 0)
3675 return Res;
3676 if (FMF.any())
3677 Inst->setFastMathFlags(FMF);
3678 return 0;
3679 }
3680
3681 case lltok::kw_sdiv:
3682 case lltok::kw_udiv:
3683 case lltok::kw_lshr:
3684 case lltok::kw_ashr: {
3685 bool Exact = EatIfPresent(lltok::kw_exact);
3686
3687 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true;
3688 if (Exact) cast<BinaryOperator>(Inst)->setIsExact(true);
3689 return false;
3690 }
3691
3692 case lltok::kw_urem:
3693 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1);
3694 case lltok::kw_and:
3695 case lltok::kw_or:
3696 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal);
3697 case lltok::kw_icmp:
3698 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal);
3699 // Casts.
3700 case lltok::kw_trunc:
3701 case lltok::kw_zext:
3702 case lltok::kw_sext:
3703 case lltok::kw_fptrunc:
3704 case lltok::kw_fpext:
3705 case lltok::kw_bitcast:
3706 case lltok::kw_addrspacecast:
3707 case lltok::kw_uitofp:
3708 case lltok::kw_sitofp:
3709 case lltok::kw_fptoui:
3710 case lltok::kw_fptosi:
3711 case lltok::kw_inttoptr:
3712 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal);
3713 // Other.
3714 case lltok::kw_select: return ParseSelect(Inst, PFS);
3715 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS);
3716 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS);
3717 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS);
3718 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS);
3719 case lltok::kw_phi: return ParsePHI(Inst, PFS);
3720 case lltok::kw_landingpad: return ParseLandingPad(Inst, PFS);
3721 // Call.
3722 case lltok::kw_call: return ParseCall(Inst, PFS, CallInst::TCK_None);
3723 case lltok::kw_tail: return ParseCall(Inst, PFS, CallInst::TCK_Tail);
3724 case lltok::kw_musttail: return ParseCall(Inst, PFS, CallInst::TCK_MustTail);
3725 // Memory.
3726 case lltok::kw_alloca: return ParseAlloc(Inst, PFS);
3727 case lltok::kw_load: return ParseLoad(Inst, PFS);
3728 case lltok::kw_store: return ParseStore(Inst, PFS);
3729 case lltok::kw_cmpxchg: return ParseCmpXchg(Inst, PFS);
3730 case lltok::kw_atomicrmw: return ParseAtomicRMW(Inst, PFS);
3731 case lltok::kw_fence: return ParseFence(Inst, PFS);
3732 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS);
3733 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS);
3734 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS);
3735 }
3736 }
3737
3738 /// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind.
ParseCmpPredicate(unsigned & P,unsigned Opc)3739 bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) {
3740 if (Opc == Instruction::FCmp) {
3741 switch (Lex.getKind()) {
3742 default: return TokError("expected fcmp predicate (e.g. 'oeq')");
3743 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break;
3744 case lltok::kw_one: P = CmpInst::FCMP_ONE; break;
3745 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break;
3746 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break;
3747 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break;
3748 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break;
3749 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break;
3750 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break;
3751 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break;
3752 case lltok::kw_une: P = CmpInst::FCMP_UNE; break;
3753 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break;
3754 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break;
3755 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break;
3756 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break;
3757 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break;
3758 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break;
3759 }
3760 } else {
3761 switch (Lex.getKind()) {
3762 default: return TokError("expected icmp predicate (e.g. 'eq')");
3763 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break;
3764 case lltok::kw_ne: P = CmpInst::ICMP_NE; break;
3765 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break;
3766 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break;
3767 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break;
3768 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break;
3769 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break;
3770 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break;
3771 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break;
3772 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break;
3773 }
3774 }
3775 Lex.Lex();
3776 return false;
3777 }
3778
3779 //===----------------------------------------------------------------------===//
3780 // Terminator Instructions.
3781 //===----------------------------------------------------------------------===//
3782
3783 /// ParseRet - Parse a return instruction.
3784 /// ::= 'ret' void (',' !dbg, !1)*
3785 /// ::= 'ret' TypeAndValue (',' !dbg, !1)*
ParseRet(Instruction * & Inst,BasicBlock * BB,PerFunctionState & PFS)3786 bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB,
3787 PerFunctionState &PFS) {
3788 SMLoc TypeLoc = Lex.getLoc();
3789 Type *Ty = nullptr;
3790 if (ParseType(Ty, true /*void allowed*/)) return true;
3791
3792 Type *ResType = PFS.getFunction().getReturnType();
3793
3794 if (Ty->isVoidTy()) {
3795 if (!ResType->isVoidTy())
3796 return Error(TypeLoc, "value doesn't match function result type '" +
3797 getTypeString(ResType) + "'");
3798
3799 Inst = ReturnInst::Create(Context);
3800 return false;
3801 }
3802
3803 Value *RV;
3804 if (ParseValue(Ty, RV, PFS)) return true;
3805
3806 if (ResType != RV->getType())
3807 return Error(TypeLoc, "value doesn't match function result type '" +
3808 getTypeString(ResType) + "'");
3809
3810 Inst = ReturnInst::Create(Context, RV);
3811 return false;
3812 }
3813
3814
3815 /// ParseBr
3816 /// ::= 'br' TypeAndValue
3817 /// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue
ParseBr(Instruction * & Inst,PerFunctionState & PFS)3818 bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) {
3819 LocTy Loc, Loc2;
3820 Value *Op0;
3821 BasicBlock *Op1, *Op2;
3822 if (ParseTypeAndValue(Op0, Loc, PFS)) return true;
3823
3824 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) {
3825 Inst = BranchInst::Create(BB);
3826 return false;
3827 }
3828
3829 if (Op0->getType() != Type::getInt1Ty(Context))
3830 return Error(Loc, "branch condition must have 'i1' type");
3831
3832 if (ParseToken(lltok::comma, "expected ',' after branch condition") ||
3833 ParseTypeAndBasicBlock(Op1, Loc, PFS) ||
3834 ParseToken(lltok::comma, "expected ',' after true destination") ||
3835 ParseTypeAndBasicBlock(Op2, Loc2, PFS))
3836 return true;
3837
3838 Inst = BranchInst::Create(Op1, Op2, Op0);
3839 return false;
3840 }
3841
3842 /// ParseSwitch
3843 /// Instruction
3844 /// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']'
3845 /// JumpTable
3846 /// ::= (TypeAndValue ',' TypeAndValue)*
ParseSwitch(Instruction * & Inst,PerFunctionState & PFS)3847 bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) {
3848 LocTy CondLoc, BBLoc;
3849 Value *Cond;
3850 BasicBlock *DefaultBB;
3851 if (ParseTypeAndValue(Cond, CondLoc, PFS) ||
3852 ParseToken(lltok::comma, "expected ',' after switch condition") ||
3853 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) ||
3854 ParseToken(lltok::lsquare, "expected '[' with switch table"))
3855 return true;
3856
3857 if (!Cond->getType()->isIntegerTy())
3858 return Error(CondLoc, "switch condition must have integer type");
3859
3860 // Parse the jump table pairs.
3861 SmallPtrSet<Value*, 32> SeenCases;
3862 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table;
3863 while (Lex.getKind() != lltok::rsquare) {
3864 Value *Constant;
3865 BasicBlock *DestBB;
3866
3867 if (ParseTypeAndValue(Constant, CondLoc, PFS) ||
3868 ParseToken(lltok::comma, "expected ',' after case value") ||
3869 ParseTypeAndBasicBlock(DestBB, PFS))
3870 return true;
3871
3872 if (!SeenCases.insert(Constant).second)
3873 return Error(CondLoc, "duplicate case value in switch");
3874 if (!isa<ConstantInt>(Constant))
3875 return Error(CondLoc, "case value is not a constant integer");
3876
3877 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB));
3878 }
3879
3880 Lex.Lex(); // Eat the ']'.
3881
3882 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size());
3883 for (unsigned i = 0, e = Table.size(); i != e; ++i)
3884 SI->addCase(Table[i].first, Table[i].second);
3885 Inst = SI;
3886 return false;
3887 }
3888
3889 /// ParseIndirectBr
3890 /// Instruction
3891 /// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']'
ParseIndirectBr(Instruction * & Inst,PerFunctionState & PFS)3892 bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) {
3893 LocTy AddrLoc;
3894 Value *Address;
3895 if (ParseTypeAndValue(Address, AddrLoc, PFS) ||
3896 ParseToken(lltok::comma, "expected ',' after indirectbr address") ||
3897 ParseToken(lltok::lsquare, "expected '[' with indirectbr"))
3898 return true;
3899
3900 if (!Address->getType()->isPointerTy())
3901 return Error(AddrLoc, "indirectbr address must have pointer type");
3902
3903 // Parse the destination list.
3904 SmallVector<BasicBlock*, 16> DestList;
3905
3906 if (Lex.getKind() != lltok::rsquare) {
3907 BasicBlock *DestBB;
3908 if (ParseTypeAndBasicBlock(DestBB, PFS))
3909 return true;
3910 DestList.push_back(DestBB);
3911
3912 while (EatIfPresent(lltok::comma)) {
3913 if (ParseTypeAndBasicBlock(DestBB, PFS))
3914 return true;
3915 DestList.push_back(DestBB);
3916 }
3917 }
3918
3919 if (ParseToken(lltok::rsquare, "expected ']' at end of block list"))
3920 return true;
3921
3922 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size());
3923 for (unsigned i = 0, e = DestList.size(); i != e; ++i)
3924 IBI->addDestination(DestList[i]);
3925 Inst = IBI;
3926 return false;
3927 }
3928
3929
3930 /// ParseInvoke
3931 /// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList
3932 /// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue
ParseInvoke(Instruction * & Inst,PerFunctionState & PFS)3933 bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) {
3934 LocTy CallLoc = Lex.getLoc();
3935 AttrBuilder RetAttrs, FnAttrs;
3936 std::vector<unsigned> FwdRefAttrGrps;
3937 LocTy NoBuiltinLoc;
3938 unsigned CC;
3939 Type *RetType = nullptr;
3940 LocTy RetTypeLoc;
3941 ValID CalleeID;
3942 SmallVector<ParamInfo, 16> ArgList;
3943
3944 BasicBlock *NormalBB, *UnwindBB;
3945 if (ParseOptionalCallingConv(CC) ||
3946 ParseOptionalReturnAttrs(RetAttrs) ||
3947 ParseType(RetType, RetTypeLoc, true /*void allowed*/) ||
3948 ParseValID(CalleeID) ||
3949 ParseParameterList(ArgList, PFS) ||
3950 ParseFnAttributeValuePairs(FnAttrs, FwdRefAttrGrps, false,
3951 NoBuiltinLoc) ||
3952 ParseToken(lltok::kw_to, "expected 'to' in invoke") ||
3953 ParseTypeAndBasicBlock(NormalBB, PFS) ||
3954 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") ||
3955 ParseTypeAndBasicBlock(UnwindBB, PFS))
3956 return true;
3957
3958 // If RetType is a non-function pointer type, then this is the short syntax
3959 // for the call, which means that RetType is just the return type. Infer the
3960 // rest of the function argument types from the arguments that are present.
3961 PointerType *PFTy = nullptr;
3962 FunctionType *Ty = nullptr;
3963 if (!(PFTy = dyn_cast<PointerType>(RetType)) ||
3964 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
3965 // Pull out the types of all of the arguments...
3966 std::vector<Type*> ParamTypes;
3967 for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
3968 ParamTypes.push_back(ArgList[i].V->getType());
3969
3970 if (!FunctionType::isValidReturnType(RetType))
3971 return Error(RetTypeLoc, "Invalid result type for LLVM function");
3972
3973 Ty = FunctionType::get(RetType, ParamTypes, false);
3974 PFTy = PointerType::getUnqual(Ty);
3975 }
3976
3977 // Look up the callee.
3978 Value *Callee;
3979 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true;
3980
3981 // Set up the Attribute for the function.
3982 SmallVector<AttributeSet, 8> Attrs;
3983 if (RetAttrs.hasAttributes())
3984 Attrs.push_back(AttributeSet::get(RetType->getContext(),
3985 AttributeSet::ReturnIndex,
3986 RetAttrs));
3987
3988 SmallVector<Value*, 8> Args;
3989
3990 // Loop through FunctionType's arguments and ensure they are specified
3991 // correctly. Also, gather any parameter attributes.
3992 FunctionType::param_iterator I = Ty->param_begin();
3993 FunctionType::param_iterator E = Ty->param_end();
3994 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
3995 Type *ExpectedTy = nullptr;
3996 if (I != E) {
3997 ExpectedTy = *I++;
3998 } else if (!Ty->isVarArg()) {
3999 return Error(ArgList[i].Loc, "too many arguments specified");
4000 }
4001
4002 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType())
4003 return Error(ArgList[i].Loc, "argument is not of expected type '" +
4004 getTypeString(ExpectedTy) + "'");
4005 Args.push_back(ArgList[i].V);
4006 if (ArgList[i].Attrs.hasAttributes(i + 1)) {
4007 AttrBuilder B(ArgList[i].Attrs, i + 1);
4008 Attrs.push_back(AttributeSet::get(RetType->getContext(), i + 1, B));
4009 }
4010 }
4011
4012 if (I != E)
4013 return Error(CallLoc, "not enough parameters specified for call");
4014
4015 if (FnAttrs.hasAttributes())
4016 Attrs.push_back(AttributeSet::get(RetType->getContext(),
4017 AttributeSet::FunctionIndex,
4018 FnAttrs));
4019
4020 // Finish off the Attribute and check them
4021 AttributeSet PAL = AttributeSet::get(Context, Attrs);
4022
4023 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, Args);
4024 II->setCallingConv(CC);
4025 II->setAttributes(PAL);
4026 ForwardRefAttrGroups[II] = FwdRefAttrGrps;
4027 Inst = II;
4028 return false;
4029 }
4030
4031 /// ParseResume
4032 /// ::= 'resume' TypeAndValue
ParseResume(Instruction * & Inst,PerFunctionState & PFS)4033 bool LLParser::ParseResume(Instruction *&Inst, PerFunctionState &PFS) {
4034 Value *Exn; LocTy ExnLoc;
4035 if (ParseTypeAndValue(Exn, ExnLoc, PFS))
4036 return true;
4037
4038 ResumeInst *RI = ResumeInst::Create(Exn);
4039 Inst = RI;
4040 return false;
4041 }
4042
4043 //===----------------------------------------------------------------------===//
4044 // Binary Operators.
4045 //===----------------------------------------------------------------------===//
4046
4047 /// ParseArithmetic
4048 /// ::= ArithmeticOps TypeAndValue ',' Value
4049 ///
4050 /// If OperandType is 0, then any FP or integer operand is allowed. If it is 1,
4051 /// then any integer operand is allowed, if it is 2, any fp operand is allowed.
ParseArithmetic(Instruction * & Inst,PerFunctionState & PFS,unsigned Opc,unsigned OperandType)4052 bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS,
4053 unsigned Opc, unsigned OperandType) {
4054 LocTy Loc; Value *LHS, *RHS;
4055 if (ParseTypeAndValue(LHS, Loc, PFS) ||
4056 ParseToken(lltok::comma, "expected ',' in arithmetic operation") ||
4057 ParseValue(LHS->getType(), RHS, PFS))
4058 return true;
4059
4060 bool Valid;
4061 switch (OperandType) {
4062 default: llvm_unreachable("Unknown operand type!");
4063 case 0: // int or FP.
4064 Valid = LHS->getType()->isIntOrIntVectorTy() ||
4065 LHS->getType()->isFPOrFPVectorTy();
4066 break;
4067 case 1: Valid = LHS->getType()->isIntOrIntVectorTy(); break;
4068 case 2: Valid = LHS->getType()->isFPOrFPVectorTy(); break;
4069 }
4070
4071 if (!Valid)
4072 return Error(Loc, "invalid operand type for instruction");
4073
4074 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
4075 return false;
4076 }
4077
4078 /// ParseLogical
4079 /// ::= ArithmeticOps TypeAndValue ',' Value {
ParseLogical(Instruction * & Inst,PerFunctionState & PFS,unsigned Opc)4080 bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS,
4081 unsigned Opc) {
4082 LocTy Loc; Value *LHS, *RHS;
4083 if (ParseTypeAndValue(LHS, Loc, PFS) ||
4084 ParseToken(lltok::comma, "expected ',' in logical operation") ||
4085 ParseValue(LHS->getType(), RHS, PFS))
4086 return true;
4087
4088 if (!LHS->getType()->isIntOrIntVectorTy())
4089 return Error(Loc,"instruction requires integer or integer vector operands");
4090
4091 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
4092 return false;
4093 }
4094
4095
4096 /// ParseCompare
4097 /// ::= 'icmp' IPredicates TypeAndValue ',' Value
4098 /// ::= 'fcmp' FPredicates TypeAndValue ',' Value
ParseCompare(Instruction * & Inst,PerFunctionState & PFS,unsigned Opc)4099 bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS,
4100 unsigned Opc) {
4101 // Parse the integer/fp comparison predicate.
4102 LocTy Loc;
4103 unsigned Pred;
4104 Value *LHS, *RHS;
4105 if (ParseCmpPredicate(Pred, Opc) ||
4106 ParseTypeAndValue(LHS, Loc, PFS) ||
4107 ParseToken(lltok::comma, "expected ',' after compare value") ||
4108 ParseValue(LHS->getType(), RHS, PFS))
4109 return true;
4110
4111 if (Opc == Instruction::FCmp) {
4112 if (!LHS->getType()->isFPOrFPVectorTy())
4113 return Error(Loc, "fcmp requires floating point operands");
4114 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS);
4115 } else {
4116 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!");
4117 if (!LHS->getType()->isIntOrIntVectorTy() &&
4118 !LHS->getType()->getScalarType()->isPointerTy())
4119 return Error(Loc, "icmp requires integer operands");
4120 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS);
4121 }
4122 return false;
4123 }
4124
4125 //===----------------------------------------------------------------------===//
4126 // Other Instructions.
4127 //===----------------------------------------------------------------------===//
4128
4129
4130 /// ParseCast
4131 /// ::= CastOpc TypeAndValue 'to' Type
ParseCast(Instruction * & Inst,PerFunctionState & PFS,unsigned Opc)4132 bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS,
4133 unsigned Opc) {
4134 LocTy Loc;
4135 Value *Op;
4136 Type *DestTy = nullptr;
4137 if (ParseTypeAndValue(Op, Loc, PFS) ||
4138 ParseToken(lltok::kw_to, "expected 'to' after cast value") ||
4139 ParseType(DestTy))
4140 return true;
4141
4142 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) {
4143 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy);
4144 return Error(Loc, "invalid cast opcode for cast from '" +
4145 getTypeString(Op->getType()) + "' to '" +
4146 getTypeString(DestTy) + "'");
4147 }
4148 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy);
4149 return false;
4150 }
4151
4152 /// ParseSelect
4153 /// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue
ParseSelect(Instruction * & Inst,PerFunctionState & PFS)4154 bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) {
4155 LocTy Loc;
4156 Value *Op0, *Op1, *Op2;
4157 if (ParseTypeAndValue(Op0, Loc, PFS) ||
4158 ParseToken(lltok::comma, "expected ',' after select condition") ||
4159 ParseTypeAndValue(Op1, PFS) ||
4160 ParseToken(lltok::comma, "expected ',' after select value") ||
4161 ParseTypeAndValue(Op2, PFS))
4162 return true;
4163
4164 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2))
4165 return Error(Loc, Reason);
4166
4167 Inst = SelectInst::Create(Op0, Op1, Op2);
4168 return false;
4169 }
4170
4171 /// ParseVA_Arg
4172 /// ::= 'va_arg' TypeAndValue ',' Type
ParseVA_Arg(Instruction * & Inst,PerFunctionState & PFS)4173 bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) {
4174 Value *Op;
4175 Type *EltTy = nullptr;
4176 LocTy TypeLoc;
4177 if (ParseTypeAndValue(Op, PFS) ||
4178 ParseToken(lltok::comma, "expected ',' after vaarg operand") ||
4179 ParseType(EltTy, TypeLoc))
4180 return true;
4181
4182 if (!EltTy->isFirstClassType())
4183 return Error(TypeLoc, "va_arg requires operand with first class type");
4184
4185 Inst = new VAArgInst(Op, EltTy);
4186 return false;
4187 }
4188
4189 /// ParseExtractElement
4190 /// ::= 'extractelement' TypeAndValue ',' TypeAndValue
ParseExtractElement(Instruction * & Inst,PerFunctionState & PFS)4191 bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) {
4192 LocTy Loc;
4193 Value *Op0, *Op1;
4194 if (ParseTypeAndValue(Op0, Loc, PFS) ||
4195 ParseToken(lltok::comma, "expected ',' after extract value") ||
4196 ParseTypeAndValue(Op1, PFS))
4197 return true;
4198
4199 if (!ExtractElementInst::isValidOperands(Op0, Op1))
4200 return Error(Loc, "invalid extractelement operands");
4201
4202 Inst = ExtractElementInst::Create(Op0, Op1);
4203 return false;
4204 }
4205
4206 /// ParseInsertElement
4207 /// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue
ParseInsertElement(Instruction * & Inst,PerFunctionState & PFS)4208 bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) {
4209 LocTy Loc;
4210 Value *Op0, *Op1, *Op2;
4211 if (ParseTypeAndValue(Op0, Loc, PFS) ||
4212 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
4213 ParseTypeAndValue(Op1, PFS) ||
4214 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
4215 ParseTypeAndValue(Op2, PFS))
4216 return true;
4217
4218 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2))
4219 return Error(Loc, "invalid insertelement operands");
4220
4221 Inst = InsertElementInst::Create(Op0, Op1, Op2);
4222 return false;
4223 }
4224
4225 /// ParseShuffleVector
4226 /// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue
ParseShuffleVector(Instruction * & Inst,PerFunctionState & PFS)4227 bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) {
4228 LocTy Loc;
4229 Value *Op0, *Op1, *Op2;
4230 if (ParseTypeAndValue(Op0, Loc, PFS) ||
4231 ParseToken(lltok::comma, "expected ',' after shuffle mask") ||
4232 ParseTypeAndValue(Op1, PFS) ||
4233 ParseToken(lltok::comma, "expected ',' after shuffle value") ||
4234 ParseTypeAndValue(Op2, PFS))
4235 return true;
4236
4237 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2))
4238 return Error(Loc, "invalid shufflevector operands");
4239
4240 Inst = new ShuffleVectorInst(Op0, Op1, Op2);
4241 return false;
4242 }
4243
4244 /// ParsePHI
4245 /// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')*
ParsePHI(Instruction * & Inst,PerFunctionState & PFS)4246 int LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) {
4247 Type *Ty = nullptr; LocTy TypeLoc;
4248 Value *Op0, *Op1;
4249
4250 if (ParseType(Ty, TypeLoc) ||
4251 ParseToken(lltok::lsquare, "expected '[' in phi value list") ||
4252 ParseValue(Ty, Op0, PFS) ||
4253 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
4254 ParseValue(Type::getLabelTy(Context), Op1, PFS) ||
4255 ParseToken(lltok::rsquare, "expected ']' in phi value list"))
4256 return true;
4257
4258 bool AteExtraComma = false;
4259 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals;
4260 while (1) {
4261 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1)));
4262
4263 if (!EatIfPresent(lltok::comma))
4264 break;
4265
4266 if (Lex.getKind() == lltok::MetadataVar) {
4267 AteExtraComma = true;
4268 break;
4269 }
4270
4271 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") ||
4272 ParseValue(Ty, Op0, PFS) ||
4273 ParseToken(lltok::comma, "expected ',' after insertelement value") ||
4274 ParseValue(Type::getLabelTy(Context), Op1, PFS) ||
4275 ParseToken(lltok::rsquare, "expected ']' in phi value list"))
4276 return true;
4277 }
4278
4279 if (!Ty->isFirstClassType())
4280 return Error(TypeLoc, "phi node must have first class type");
4281
4282 PHINode *PN = PHINode::Create(Ty, PHIVals.size());
4283 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i)
4284 PN->addIncoming(PHIVals[i].first, PHIVals[i].second);
4285 Inst = PN;
4286 return AteExtraComma ? InstExtraComma : InstNormal;
4287 }
4288
4289 /// ParseLandingPad
4290 /// ::= 'landingpad' Type 'personality' TypeAndValue 'cleanup'? Clause+
4291 /// Clause
4292 /// ::= 'catch' TypeAndValue
4293 /// ::= 'filter'
4294 /// ::= 'filter' TypeAndValue ( ',' TypeAndValue )*
ParseLandingPad(Instruction * & Inst,PerFunctionState & PFS)4295 bool LLParser::ParseLandingPad(Instruction *&Inst, PerFunctionState &PFS) {
4296 Type *Ty = nullptr; LocTy TyLoc;
4297 Value *PersFn; LocTy PersFnLoc;
4298
4299 if (ParseType(Ty, TyLoc) ||
4300 ParseToken(lltok::kw_personality, "expected 'personality'") ||
4301 ParseTypeAndValue(PersFn, PersFnLoc, PFS))
4302 return true;
4303
4304 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, 0);
4305 LP->setCleanup(EatIfPresent(lltok::kw_cleanup));
4306
4307 while (Lex.getKind() == lltok::kw_catch || Lex.getKind() == lltok::kw_filter){
4308 LandingPadInst::ClauseType CT;
4309 if (EatIfPresent(lltok::kw_catch))
4310 CT = LandingPadInst::Catch;
4311 else if (EatIfPresent(lltok::kw_filter))
4312 CT = LandingPadInst::Filter;
4313 else
4314 return TokError("expected 'catch' or 'filter' clause type");
4315
4316 Value *V;
4317 LocTy VLoc;
4318 if (ParseTypeAndValue(V, VLoc, PFS)) {
4319 delete LP;
4320 return true;
4321 }
4322
4323 // A 'catch' type expects a non-array constant. A filter clause expects an
4324 // array constant.
4325 if (CT == LandingPadInst::Catch) {
4326 if (isa<ArrayType>(V->getType()))
4327 Error(VLoc, "'catch' clause has an invalid type");
4328 } else {
4329 if (!isa<ArrayType>(V->getType()))
4330 Error(VLoc, "'filter' clause has an invalid type");
4331 }
4332
4333 LP->addClause(cast<Constant>(V));
4334 }
4335
4336 Inst = LP;
4337 return false;
4338 }
4339
4340 /// ParseCall
4341 /// ::= 'call' OptionalCallingConv OptionalAttrs Type Value
4342 /// ParameterList OptionalAttrs
4343 /// ::= 'tail' 'call' OptionalCallingConv OptionalAttrs Type Value
4344 /// ParameterList OptionalAttrs
4345 /// ::= 'musttail' 'call' OptionalCallingConv OptionalAttrs Type Value
4346 /// ParameterList OptionalAttrs
ParseCall(Instruction * & Inst,PerFunctionState & PFS,CallInst::TailCallKind TCK)4347 bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS,
4348 CallInst::TailCallKind TCK) {
4349 AttrBuilder RetAttrs, FnAttrs;
4350 std::vector<unsigned> FwdRefAttrGrps;
4351 LocTy BuiltinLoc;
4352 unsigned CC;
4353 Type *RetType = nullptr;
4354 LocTy RetTypeLoc;
4355 ValID CalleeID;
4356 SmallVector<ParamInfo, 16> ArgList;
4357 LocTy CallLoc = Lex.getLoc();
4358
4359 if ((TCK != CallInst::TCK_None &&
4360 ParseToken(lltok::kw_call, "expected 'tail call'")) ||
4361 ParseOptionalCallingConv(CC) ||
4362 ParseOptionalReturnAttrs(RetAttrs) ||
4363 ParseType(RetType, RetTypeLoc, true /*void allowed*/) ||
4364 ParseValID(CalleeID) ||
4365 ParseParameterList(ArgList, PFS, TCK == CallInst::TCK_MustTail,
4366 PFS.getFunction().isVarArg()) ||
4367 ParseFnAttributeValuePairs(FnAttrs, FwdRefAttrGrps, false,
4368 BuiltinLoc))
4369 return true;
4370
4371 // If RetType is a non-function pointer type, then this is the short syntax
4372 // for the call, which means that RetType is just the return type. Infer the
4373 // rest of the function argument types from the arguments that are present.
4374 PointerType *PFTy = nullptr;
4375 FunctionType *Ty = nullptr;
4376 if (!(PFTy = dyn_cast<PointerType>(RetType)) ||
4377 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
4378 // Pull out the types of all of the arguments...
4379 std::vector<Type*> ParamTypes;
4380 for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
4381 ParamTypes.push_back(ArgList[i].V->getType());
4382
4383 if (!FunctionType::isValidReturnType(RetType))
4384 return Error(RetTypeLoc, "Invalid result type for LLVM function");
4385
4386 Ty = FunctionType::get(RetType, ParamTypes, false);
4387 PFTy = PointerType::getUnqual(Ty);
4388 }
4389
4390 // Look up the callee.
4391 Value *Callee;
4392 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true;
4393
4394 // Set up the Attribute for the function.
4395 SmallVector<AttributeSet, 8> Attrs;
4396 if (RetAttrs.hasAttributes())
4397 Attrs.push_back(AttributeSet::get(RetType->getContext(),
4398 AttributeSet::ReturnIndex,
4399 RetAttrs));
4400
4401 SmallVector<Value*, 8> Args;
4402
4403 // Loop through FunctionType's arguments and ensure they are specified
4404 // correctly. Also, gather any parameter attributes.
4405 FunctionType::param_iterator I = Ty->param_begin();
4406 FunctionType::param_iterator E = Ty->param_end();
4407 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
4408 Type *ExpectedTy = nullptr;
4409 if (I != E) {
4410 ExpectedTy = *I++;
4411 } else if (!Ty->isVarArg()) {
4412 return Error(ArgList[i].Loc, "too many arguments specified");
4413 }
4414
4415 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType())
4416 return Error(ArgList[i].Loc, "argument is not of expected type '" +
4417 getTypeString(ExpectedTy) + "'");
4418 Args.push_back(ArgList[i].V);
4419 if (ArgList[i].Attrs.hasAttributes(i + 1)) {
4420 AttrBuilder B(ArgList[i].Attrs, i + 1);
4421 Attrs.push_back(AttributeSet::get(RetType->getContext(), i + 1, B));
4422 }
4423 }
4424
4425 if (I != E)
4426 return Error(CallLoc, "not enough parameters specified for call");
4427
4428 if (FnAttrs.hasAttributes())
4429 Attrs.push_back(AttributeSet::get(RetType->getContext(),
4430 AttributeSet::FunctionIndex,
4431 FnAttrs));
4432
4433 // Finish off the Attribute and check them
4434 AttributeSet PAL = AttributeSet::get(Context, Attrs);
4435
4436 CallInst *CI = CallInst::Create(Callee, Args);
4437 CI->setTailCallKind(TCK);
4438 CI->setCallingConv(CC);
4439 CI->setAttributes(PAL);
4440 ForwardRefAttrGroups[CI] = FwdRefAttrGrps;
4441 Inst = CI;
4442 return false;
4443 }
4444
4445 //===----------------------------------------------------------------------===//
4446 // Memory Instructions.
4447 //===----------------------------------------------------------------------===//
4448
4449 /// ParseAlloc
4450 /// ::= 'alloca' 'inalloca'? Type (',' TypeAndValue)? (',' 'align' i32)?
ParseAlloc(Instruction * & Inst,PerFunctionState & PFS)4451 int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS) {
4452 Value *Size = nullptr;
4453 LocTy SizeLoc;
4454 unsigned Alignment = 0;
4455 Type *Ty = nullptr;
4456
4457 bool IsInAlloca = EatIfPresent(lltok::kw_inalloca);
4458
4459 if (ParseType(Ty)) return true;
4460
4461 bool AteExtraComma = false;
4462 if (EatIfPresent(lltok::comma)) {
4463 if (Lex.getKind() == lltok::kw_align) {
4464 if (ParseOptionalAlignment(Alignment)) return true;
4465 } else if (Lex.getKind() == lltok::MetadataVar) {
4466 AteExtraComma = true;
4467 } else {
4468 if (ParseTypeAndValue(Size, SizeLoc, PFS) ||
4469 ParseOptionalCommaAlign(Alignment, AteExtraComma))
4470 return true;
4471 }
4472 }
4473
4474 if (Size && !Size->getType()->isIntegerTy())
4475 return Error(SizeLoc, "element count must have integer type");
4476
4477 AllocaInst *AI = new AllocaInst(Ty, Size, Alignment);
4478 AI->setUsedWithInAlloca(IsInAlloca);
4479 Inst = AI;
4480 return AteExtraComma ? InstExtraComma : InstNormal;
4481 }
4482
4483 /// ParseLoad
4484 /// ::= 'load' 'volatile'? TypeAndValue (',' 'align' i32)?
4485 /// ::= 'load' 'atomic' 'volatile'? TypeAndValue
4486 /// 'singlethread'? AtomicOrdering (',' 'align' i32)?
ParseLoad(Instruction * & Inst,PerFunctionState & PFS)4487 int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS) {
4488 Value *Val; LocTy Loc;
4489 unsigned Alignment = 0;
4490 bool AteExtraComma = false;
4491 bool isAtomic = false;
4492 AtomicOrdering Ordering = NotAtomic;
4493 SynchronizationScope Scope = CrossThread;
4494
4495 if (Lex.getKind() == lltok::kw_atomic) {
4496 isAtomic = true;
4497 Lex.Lex();
4498 }
4499
4500 bool isVolatile = false;
4501 if (Lex.getKind() == lltok::kw_volatile) {
4502 isVolatile = true;
4503 Lex.Lex();
4504 }
4505
4506 if (ParseTypeAndValue(Val, Loc, PFS) ||
4507 ParseScopeAndOrdering(isAtomic, Scope, Ordering) ||
4508 ParseOptionalCommaAlign(Alignment, AteExtraComma))
4509 return true;
4510
4511 if (!Val->getType()->isPointerTy() ||
4512 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType())
4513 return Error(Loc, "load operand must be a pointer to a first class type");
4514 if (isAtomic && !Alignment)
4515 return Error(Loc, "atomic load must have explicit non-zero alignment");
4516 if (Ordering == Release || Ordering == AcquireRelease)
4517 return Error(Loc, "atomic load cannot use Release ordering");
4518
4519 Inst = new LoadInst(Val, "", isVolatile, Alignment, Ordering, Scope);
4520 return AteExtraComma ? InstExtraComma : InstNormal;
4521 }
4522
4523 /// ParseStore
4524
4525 /// ::= 'store' 'volatile'? TypeAndValue ',' TypeAndValue (',' 'align' i32)?
4526 /// ::= 'store' 'atomic' 'volatile'? TypeAndValue ',' TypeAndValue
4527 /// 'singlethread'? AtomicOrdering (',' 'align' i32)?
ParseStore(Instruction * & Inst,PerFunctionState & PFS)4528 int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS) {
4529 Value *Val, *Ptr; LocTy Loc, PtrLoc;
4530 unsigned Alignment = 0;
4531 bool AteExtraComma = false;
4532 bool isAtomic = false;
4533 AtomicOrdering Ordering = NotAtomic;
4534 SynchronizationScope Scope = CrossThread;
4535
4536 if (Lex.getKind() == lltok::kw_atomic) {
4537 isAtomic = true;
4538 Lex.Lex();
4539 }
4540
4541 bool isVolatile = false;
4542 if (Lex.getKind() == lltok::kw_volatile) {
4543 isVolatile = true;
4544 Lex.Lex();
4545 }
4546
4547 if (ParseTypeAndValue(Val, Loc, PFS) ||
4548 ParseToken(lltok::comma, "expected ',' after store operand") ||
4549 ParseTypeAndValue(Ptr, PtrLoc, PFS) ||
4550 ParseScopeAndOrdering(isAtomic, Scope, Ordering) ||
4551 ParseOptionalCommaAlign(Alignment, AteExtraComma))
4552 return true;
4553
4554 if (!Ptr->getType()->isPointerTy())
4555 return Error(PtrLoc, "store operand must be a pointer");
4556 if (!Val->getType()->isFirstClassType())
4557 return Error(Loc, "store operand must be a first class value");
4558 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType())
4559 return Error(Loc, "stored value and pointer type do not match");
4560 if (isAtomic && !Alignment)
4561 return Error(Loc, "atomic store must have explicit non-zero alignment");
4562 if (Ordering == Acquire || Ordering == AcquireRelease)
4563 return Error(Loc, "atomic store cannot use Acquire ordering");
4564
4565 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment, Ordering, Scope);
4566 return AteExtraComma ? InstExtraComma : InstNormal;
4567 }
4568
4569 /// ParseCmpXchg
4570 /// ::= 'cmpxchg' 'weak'? 'volatile'? TypeAndValue ',' TypeAndValue ','
4571 /// TypeAndValue 'singlethread'? AtomicOrdering AtomicOrdering
ParseCmpXchg(Instruction * & Inst,PerFunctionState & PFS)4572 int LLParser::ParseCmpXchg(Instruction *&Inst, PerFunctionState &PFS) {
4573 Value *Ptr, *Cmp, *New; LocTy PtrLoc, CmpLoc, NewLoc;
4574 bool AteExtraComma = false;
4575 AtomicOrdering SuccessOrdering = NotAtomic;
4576 AtomicOrdering FailureOrdering = NotAtomic;
4577 SynchronizationScope Scope = CrossThread;
4578 bool isVolatile = false;
4579 bool isWeak = false;
4580
4581 if (EatIfPresent(lltok::kw_weak))
4582 isWeak = true;
4583
4584 if (EatIfPresent(lltok::kw_volatile))
4585 isVolatile = true;
4586
4587 if (ParseTypeAndValue(Ptr, PtrLoc, PFS) ||
4588 ParseToken(lltok::comma, "expected ',' after cmpxchg address") ||
4589 ParseTypeAndValue(Cmp, CmpLoc, PFS) ||
4590 ParseToken(lltok::comma, "expected ',' after cmpxchg cmp operand") ||
4591 ParseTypeAndValue(New, NewLoc, PFS) ||
4592 ParseScopeAndOrdering(true /*Always atomic*/, Scope, SuccessOrdering) ||
4593 ParseOrdering(FailureOrdering))
4594 return true;
4595
4596 if (SuccessOrdering == Unordered || FailureOrdering == Unordered)
4597 return TokError("cmpxchg cannot be unordered");
4598 if (SuccessOrdering < FailureOrdering)
4599 return TokError("cmpxchg must be at least as ordered on success as failure");
4600 if (FailureOrdering == Release || FailureOrdering == AcquireRelease)
4601 return TokError("cmpxchg failure ordering cannot include release semantics");
4602 if (!Ptr->getType()->isPointerTy())
4603 return Error(PtrLoc, "cmpxchg operand must be a pointer");
4604 if (cast<PointerType>(Ptr->getType())->getElementType() != Cmp->getType())
4605 return Error(CmpLoc, "compare value and pointer type do not match");
4606 if (cast<PointerType>(Ptr->getType())->getElementType() != New->getType())
4607 return Error(NewLoc, "new value and pointer type do not match");
4608 if (!New->getType()->isIntegerTy())
4609 return Error(NewLoc, "cmpxchg operand must be an integer");
4610 unsigned Size = New->getType()->getPrimitiveSizeInBits();
4611 if (Size < 8 || (Size & (Size - 1)))
4612 return Error(NewLoc, "cmpxchg operand must be power-of-two byte-sized"
4613 " integer");
4614
4615 AtomicCmpXchgInst *CXI = new AtomicCmpXchgInst(
4616 Ptr, Cmp, New, SuccessOrdering, FailureOrdering, Scope);
4617 CXI->setVolatile(isVolatile);
4618 CXI->setWeak(isWeak);
4619 Inst = CXI;
4620 return AteExtraComma ? InstExtraComma : InstNormal;
4621 }
4622
4623 /// ParseAtomicRMW
4624 /// ::= 'atomicrmw' 'volatile'? BinOp TypeAndValue ',' TypeAndValue
4625 /// 'singlethread'? AtomicOrdering
ParseAtomicRMW(Instruction * & Inst,PerFunctionState & PFS)4626 int LLParser::ParseAtomicRMW(Instruction *&Inst, PerFunctionState &PFS) {
4627 Value *Ptr, *Val; LocTy PtrLoc, ValLoc;
4628 bool AteExtraComma = false;
4629 AtomicOrdering Ordering = NotAtomic;
4630 SynchronizationScope Scope = CrossThread;
4631 bool isVolatile = false;
4632 AtomicRMWInst::BinOp Operation;
4633
4634 if (EatIfPresent(lltok::kw_volatile))
4635 isVolatile = true;
4636
4637 switch (Lex.getKind()) {
4638 default: return TokError("expected binary operation in atomicrmw");
4639 case lltok::kw_xchg: Operation = AtomicRMWInst::Xchg; break;
4640 case lltok::kw_add: Operation = AtomicRMWInst::Add; break;
4641 case lltok::kw_sub: Operation = AtomicRMWInst::Sub; break;
4642 case lltok::kw_and: Operation = AtomicRMWInst::And; break;
4643 case lltok::kw_nand: Operation = AtomicRMWInst::Nand; break;
4644 case lltok::kw_or: Operation = AtomicRMWInst::Or; break;
4645 case lltok::kw_xor: Operation = AtomicRMWInst::Xor; break;
4646 case lltok::kw_max: Operation = AtomicRMWInst::Max; break;
4647 case lltok::kw_min: Operation = AtomicRMWInst::Min; break;
4648 case lltok::kw_umax: Operation = AtomicRMWInst::UMax; break;
4649 case lltok::kw_umin: Operation = AtomicRMWInst::UMin; break;
4650 }
4651 Lex.Lex(); // Eat the operation.
4652
4653 if (ParseTypeAndValue(Ptr, PtrLoc, PFS) ||
4654 ParseToken(lltok::comma, "expected ',' after atomicrmw address") ||
4655 ParseTypeAndValue(Val, ValLoc, PFS) ||
4656 ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering))
4657 return true;
4658
4659 if (Ordering == Unordered)
4660 return TokError("atomicrmw cannot be unordered");
4661 if (!Ptr->getType()->isPointerTy())
4662 return Error(PtrLoc, "atomicrmw operand must be a pointer");
4663 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType())
4664 return Error(ValLoc, "atomicrmw value and pointer type do not match");
4665 if (!Val->getType()->isIntegerTy())
4666 return Error(ValLoc, "atomicrmw operand must be an integer");
4667 unsigned Size = Val->getType()->getPrimitiveSizeInBits();
4668 if (Size < 8 || (Size & (Size - 1)))
4669 return Error(ValLoc, "atomicrmw operand must be power-of-two byte-sized"
4670 " integer");
4671
4672 AtomicRMWInst *RMWI =
4673 new AtomicRMWInst(Operation, Ptr, Val, Ordering, Scope);
4674 RMWI->setVolatile(isVolatile);
4675 Inst = RMWI;
4676 return AteExtraComma ? InstExtraComma : InstNormal;
4677 }
4678
4679 /// ParseFence
4680 /// ::= 'fence' 'singlethread'? AtomicOrdering
ParseFence(Instruction * & Inst,PerFunctionState & PFS)4681 int LLParser::ParseFence(Instruction *&Inst, PerFunctionState &PFS) {
4682 AtomicOrdering Ordering = NotAtomic;
4683 SynchronizationScope Scope = CrossThread;
4684 if (ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering))
4685 return true;
4686
4687 if (Ordering == Unordered)
4688 return TokError("fence cannot be unordered");
4689 if (Ordering == Monotonic)
4690 return TokError("fence cannot be monotonic");
4691
4692 Inst = new FenceInst(Context, Ordering, Scope);
4693 return InstNormal;
4694 }
4695
4696 /// ParseGetElementPtr
4697 /// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)*
ParseGetElementPtr(Instruction * & Inst,PerFunctionState & PFS)4698 int LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) {
4699 Value *Ptr = nullptr;
4700 Value *Val = nullptr;
4701 LocTy Loc, EltLoc;
4702
4703 bool InBounds = EatIfPresent(lltok::kw_inbounds);
4704
4705 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true;
4706
4707 Type *BaseType = Ptr->getType();
4708 PointerType *BasePointerType = dyn_cast<PointerType>(BaseType->getScalarType());
4709 if (!BasePointerType)
4710 return Error(Loc, "base of getelementptr must be a pointer");
4711
4712 SmallVector<Value*, 16> Indices;
4713 bool AteExtraComma = false;
4714 while (EatIfPresent(lltok::comma)) {
4715 if (Lex.getKind() == lltok::MetadataVar) {
4716 AteExtraComma = true;
4717 break;
4718 }
4719 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true;
4720 if (!Val->getType()->getScalarType()->isIntegerTy())
4721 return Error(EltLoc, "getelementptr index must be an integer");
4722 if (Val->getType()->isVectorTy() != Ptr->getType()->isVectorTy())
4723 return Error(EltLoc, "getelementptr index type missmatch");
4724 if (Val->getType()->isVectorTy()) {
4725 unsigned ValNumEl = cast<VectorType>(Val->getType())->getNumElements();
4726 unsigned PtrNumEl = cast<VectorType>(Ptr->getType())->getNumElements();
4727 if (ValNumEl != PtrNumEl)
4728 return Error(EltLoc,
4729 "getelementptr vector index has a wrong number of elements");
4730 }
4731 Indices.push_back(Val);
4732 }
4733
4734 if (!Indices.empty() && !BasePointerType->getElementType()->isSized())
4735 return Error(Loc, "base element of getelementptr must be sized");
4736
4737 if (!GetElementPtrInst::getIndexedType(BaseType, Indices))
4738 return Error(Loc, "invalid getelementptr indices");
4739 Inst = GetElementPtrInst::Create(Ptr, Indices);
4740 if (InBounds)
4741 cast<GetElementPtrInst>(Inst)->setIsInBounds(true);
4742 return AteExtraComma ? InstExtraComma : InstNormal;
4743 }
4744
4745 /// ParseExtractValue
4746 /// ::= 'extractvalue' TypeAndValue (',' uint32)+
ParseExtractValue(Instruction * & Inst,PerFunctionState & PFS)4747 int LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) {
4748 Value *Val; LocTy Loc;
4749 SmallVector<unsigned, 4> Indices;
4750 bool AteExtraComma;
4751 if (ParseTypeAndValue(Val, Loc, PFS) ||
4752 ParseIndexList(Indices, AteExtraComma))
4753 return true;
4754
4755 if (!Val->getType()->isAggregateType())
4756 return Error(Loc, "extractvalue operand must be aggregate type");
4757
4758 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices))
4759 return Error(Loc, "invalid indices for extractvalue");
4760 Inst = ExtractValueInst::Create(Val, Indices);
4761 return AteExtraComma ? InstExtraComma : InstNormal;
4762 }
4763
4764 /// ParseInsertValue
4765 /// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+
ParseInsertValue(Instruction * & Inst,PerFunctionState & PFS)4766 int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) {
4767 Value *Val0, *Val1; LocTy Loc0, Loc1;
4768 SmallVector<unsigned, 4> Indices;
4769 bool AteExtraComma;
4770 if (ParseTypeAndValue(Val0, Loc0, PFS) ||
4771 ParseToken(lltok::comma, "expected comma after insertvalue operand") ||
4772 ParseTypeAndValue(Val1, Loc1, PFS) ||
4773 ParseIndexList(Indices, AteExtraComma))
4774 return true;
4775
4776 if (!Val0->getType()->isAggregateType())
4777 return Error(Loc0, "insertvalue operand must be aggregate type");
4778
4779 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices))
4780 return Error(Loc0, "invalid indices for insertvalue");
4781 Inst = InsertValueInst::Create(Val0, Val1, Indices);
4782 return AteExtraComma ? InstExtraComma : InstNormal;
4783 }
4784
4785 //===----------------------------------------------------------------------===//
4786 // Embedded metadata.
4787 //===----------------------------------------------------------------------===//
4788
4789 /// ParseMDNodeVector
4790 /// ::= { Element (',' Element)* }
4791 /// Element
4792 /// ::= 'null' | TypeAndValue
ParseMDNodeVector(SmallVectorImpl<Metadata * > & Elts)4793 bool LLParser::ParseMDNodeVector(SmallVectorImpl<Metadata *> &Elts) {
4794 if (ParseToken(lltok::lbrace, "expected '{' here"))
4795 return true;
4796
4797 // Check for an empty list.
4798 if (EatIfPresent(lltok::rbrace))
4799 return false;
4800
4801 do {
4802 // Null is a special case since it is typeless.
4803 if (EatIfPresent(lltok::kw_null)) {
4804 Elts.push_back(nullptr);
4805 continue;
4806 }
4807
4808 Metadata *MD;
4809 if (ParseMetadata(MD, nullptr))
4810 return true;
4811 Elts.push_back(MD);
4812 } while (EatIfPresent(lltok::comma));
4813
4814 return ParseToken(lltok::rbrace, "expected end of metadata node");
4815 }
4816
4817 //===----------------------------------------------------------------------===//
4818 // Use-list order directives.
4819 //===----------------------------------------------------------------------===//
sortUseListOrder(Value * V,ArrayRef<unsigned> Indexes,SMLoc Loc)4820 bool LLParser::sortUseListOrder(Value *V, ArrayRef<unsigned> Indexes,
4821 SMLoc Loc) {
4822 if (V->use_empty())
4823 return Error(Loc, "value has no uses");
4824
4825 unsigned NumUses = 0;
4826 SmallDenseMap<const Use *, unsigned, 16> Order;
4827 for (const Use &U : V->uses()) {
4828 if (++NumUses > Indexes.size())
4829 break;
4830 Order[&U] = Indexes[NumUses - 1];
4831 }
4832 if (NumUses < 2)
4833 return Error(Loc, "value only has one use");
4834 if (Order.size() != Indexes.size() || NumUses > Indexes.size())
4835 return Error(Loc, "wrong number of indexes, expected " +
4836 Twine(std::distance(V->use_begin(), V->use_end())));
4837
4838 V->sortUseList([&](const Use &L, const Use &R) {
4839 return Order.lookup(&L) < Order.lookup(&R);
4840 });
4841 return false;
4842 }
4843
4844 /// ParseUseListOrderIndexes
4845 /// ::= '{' uint32 (',' uint32)+ '}'
ParseUseListOrderIndexes(SmallVectorImpl<unsigned> & Indexes)4846 bool LLParser::ParseUseListOrderIndexes(SmallVectorImpl<unsigned> &Indexes) {
4847 SMLoc Loc = Lex.getLoc();
4848 if (ParseToken(lltok::lbrace, "expected '{' here"))
4849 return true;
4850 if (Lex.getKind() == lltok::rbrace)
4851 return Lex.Error("expected non-empty list of uselistorder indexes");
4852
4853 // Use Offset, Max, and IsOrdered to check consistency of indexes. The
4854 // indexes should be distinct numbers in the range [0, size-1], and should
4855 // not be in order.
4856 unsigned Offset = 0;
4857 unsigned Max = 0;
4858 bool IsOrdered = true;
4859 assert(Indexes.empty() && "Expected empty order vector");
4860 do {
4861 unsigned Index;
4862 if (ParseUInt32(Index))
4863 return true;
4864
4865 // Update consistency checks.
4866 Offset += Index - Indexes.size();
4867 Max = std::max(Max, Index);
4868 IsOrdered &= Index == Indexes.size();
4869
4870 Indexes.push_back(Index);
4871 } while (EatIfPresent(lltok::comma));
4872
4873 if (ParseToken(lltok::rbrace, "expected '}' here"))
4874 return true;
4875
4876 if (Indexes.size() < 2)
4877 return Error(Loc, "expected >= 2 uselistorder indexes");
4878 if (Offset != 0 || Max >= Indexes.size())
4879 return Error(Loc, "expected distinct uselistorder indexes in range [0, size)");
4880 if (IsOrdered)
4881 return Error(Loc, "expected uselistorder indexes to change the order");
4882
4883 return false;
4884 }
4885
4886 /// ParseUseListOrder
4887 /// ::= 'uselistorder' Type Value ',' UseListOrderIndexes
ParseUseListOrder(PerFunctionState * PFS)4888 bool LLParser::ParseUseListOrder(PerFunctionState *PFS) {
4889 SMLoc Loc = Lex.getLoc();
4890 if (ParseToken(lltok::kw_uselistorder, "expected uselistorder directive"))
4891 return true;
4892
4893 Value *V;
4894 SmallVector<unsigned, 16> Indexes;
4895 if (ParseTypeAndValue(V, PFS) ||
4896 ParseToken(lltok::comma, "expected comma in uselistorder directive") ||
4897 ParseUseListOrderIndexes(Indexes))
4898 return true;
4899
4900 return sortUseListOrder(V, Indexes, Loc);
4901 }
4902
4903 /// ParseUseListOrderBB
4904 /// ::= 'uselistorder_bb' @foo ',' %bar ',' UseListOrderIndexes
ParseUseListOrderBB()4905 bool LLParser::ParseUseListOrderBB() {
4906 assert(Lex.getKind() == lltok::kw_uselistorder_bb);
4907 SMLoc Loc = Lex.getLoc();
4908 Lex.Lex();
4909
4910 ValID Fn, Label;
4911 SmallVector<unsigned, 16> Indexes;
4912 if (ParseValID(Fn) ||
4913 ParseToken(lltok::comma, "expected comma in uselistorder_bb directive") ||
4914 ParseValID(Label) ||
4915 ParseToken(lltok::comma, "expected comma in uselistorder_bb directive") ||
4916 ParseUseListOrderIndexes(Indexes))
4917 return true;
4918
4919 // Check the function.
4920 GlobalValue *GV;
4921 if (Fn.Kind == ValID::t_GlobalName)
4922 GV = M->getNamedValue(Fn.StrVal);
4923 else if (Fn.Kind == ValID::t_GlobalID)
4924 GV = Fn.UIntVal < NumberedVals.size() ? NumberedVals[Fn.UIntVal] : nullptr;
4925 else
4926 return Error(Fn.Loc, "expected function name in uselistorder_bb");
4927 if (!GV)
4928 return Error(Fn.Loc, "invalid function forward reference in uselistorder_bb");
4929 auto *F = dyn_cast<Function>(GV);
4930 if (!F)
4931 return Error(Fn.Loc, "expected function name in uselistorder_bb");
4932 if (F->isDeclaration())
4933 return Error(Fn.Loc, "invalid declaration in uselistorder_bb");
4934
4935 // Check the basic block.
4936 if (Label.Kind == ValID::t_LocalID)
4937 return Error(Label.Loc, "invalid numeric label in uselistorder_bb");
4938 if (Label.Kind != ValID::t_LocalName)
4939 return Error(Label.Loc, "expected basic block name in uselistorder_bb");
4940 Value *V = F->getValueSymbolTable().lookup(Label.StrVal);
4941 if (!V)
4942 return Error(Label.Loc, "invalid basic block in uselistorder_bb");
4943 if (!isa<BasicBlock>(V))
4944 return Error(Label.Loc, "expected basic block in uselistorder_bb");
4945
4946 return sortUseListOrder(V, Indexes, Loc);
4947 }
4948