1 //===-- XCoreTargetMachine.cpp - Define TargetMachine for XCore -----------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 //
10 //===----------------------------------------------------------------------===//
11 
12 #include "XCoreTargetMachine.h"
13 #include "MCTargetDesc/XCoreMCTargetDesc.h"
14 #include "TargetInfo/XCoreTargetInfo.h"
15 #include "XCore.h"
16 #include "XCoreTargetObjectFile.h"
17 #include "XCoreTargetTransformInfo.h"
18 #include "llvm/ADT/Optional.h"
19 #include "llvm/ADT/STLExtras.h"
20 #include "llvm/Analysis/TargetTransformInfo.h"
21 #include "llvm/CodeGen/Passes.h"
22 #include "llvm/CodeGen/TargetPassConfig.h"
23 #include "llvm/MC/TargetRegistry.h"
24 #include "llvm/Support/CodeGen.h"
25 
26 using namespace llvm;
27 
28 static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
29   return RM.value_or(Reloc::Static);
30 }
31 
32 static CodeModel::Model
33 getEffectiveXCoreCodeModel(Optional<CodeModel::Model> CM) {
34   if (CM) {
35     if (*CM != CodeModel::Small && *CM != CodeModel::Large)
36       report_fatal_error("Target only supports CodeModel Small or Large");
37     return *CM;
38   }
39   return CodeModel::Small;
40 }
41 
42 /// Create an ILP32 architecture model
43 ///
44 XCoreTargetMachine::XCoreTargetMachine(const Target &T, const Triple &TT,
45                                        StringRef CPU, StringRef FS,
46                                        const TargetOptions &Options,
47                                        Optional<Reloc::Model> RM,
48                                        Optional<CodeModel::Model> CM,
49                                        CodeGenOpt::Level OL, bool JIT)
50     : LLVMTargetMachine(
51           T, "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-i64:32-f64:32-a:0:32-n32",
52           TT, CPU, FS, Options, getEffectiveRelocModel(RM),
53           getEffectiveXCoreCodeModel(CM), OL),
54       TLOF(std::make_unique<XCoreTargetObjectFile>()),
55       Subtarget(TT, std::string(CPU), std::string(FS), *this) {
56   initAsmInfo();
57 }
58 
59 XCoreTargetMachine::~XCoreTargetMachine() = default;
60 
61 namespace {
62 
63 /// XCore Code Generator Pass Configuration Options.
64 class XCorePassConfig : public TargetPassConfig {
65 public:
66   XCorePassConfig(XCoreTargetMachine &TM, PassManagerBase &PM)
67     : TargetPassConfig(TM, PM) {}
68 
69   XCoreTargetMachine &getXCoreTargetMachine() const {
70     return getTM<XCoreTargetMachine>();
71   }
72 
73   void addIRPasses() override;
74   bool addPreISel() override;
75   bool addInstSelector() override;
76   void addPreEmitPass() override;
77 };
78 
79 } // end anonymous namespace
80 
81 TargetPassConfig *XCoreTargetMachine::createPassConfig(PassManagerBase &PM) {
82   return new XCorePassConfig(*this, PM);
83 }
84 
85 void XCorePassConfig::addIRPasses() {
86   addPass(createAtomicExpandPass());
87 
88   TargetPassConfig::addIRPasses();
89 }
90 
91 bool XCorePassConfig::addPreISel() {
92   addPass(createXCoreLowerThreadLocalPass());
93   return false;
94 }
95 
96 bool XCorePassConfig::addInstSelector() {
97   addPass(createXCoreISelDag(getXCoreTargetMachine(), getOptLevel()));
98   return false;
99 }
100 
101 void XCorePassConfig::addPreEmitPass() {
102   addPass(createXCoreFrameToArgsOffsetEliminationPass());
103 }
104 
105 // Force static initialization.
106 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeXCoreTarget() {
107   RegisterTargetMachine<XCoreTargetMachine> X(getTheXCoreTarget());
108 }
109 
110 TargetTransformInfo
111 XCoreTargetMachine::getTargetTransformInfo(const Function &F) const {
112   return TargetTransformInfo(XCoreTTIImpl(this, F));
113 }
114