1# RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s
2
3# Test the extension of debug ranges from 3 predecessors.
4# Generated from the source file LiveDebugValues-3preds.c:
5# #include <stdio.h>
6# int add(int x, int y, int z, int a) {
7#  int i;
8#  for (i = 0; i < x * y; i++) {
9#    if (i < x) {
10#      a = a * x;
11#      break;
12#    }
13#    if (i < y) {
14#      a = a * y;
15#      break;
16#    }
17#    if (i < z) {
18#      a = a * z;
19#      break;
20#    }
21#  }
22#  return a;
23# }
24# with clang -g -O1 -c -emit-llvm LiveDebugValues-3preds.c -S -o live-debug-values-3preds.ll
25# then llc -stop-after stackmap-liveness live-debug-values-3preds.ll -o /dev/null > live-debug-values-3preds.mir
26
27# CHECK: ![[X_VAR:[0-9]+]] = !DILocalVariable(name: "x", {{.*}})
28# CHECK: ![[Y_VAR:[0-9]+]] = !DILocalVariable(name: "y", {{.*}})
29# CHECK: ![[Z_VAR:[0-9]+]] = !DILocalVariable(name: "z", {{.*}})
30
31# DBG_VALUE for variables "x", "y" and "z" are extended into %bb.9 from its
32# predecessors %bb.0, %bb.2 and %bb.8.
33# CHECK:      bb.9.for.end:
34# CHECK-DAG:  DBG_VALUE $edi, $noreg, ![[X_VAR]], !DIExpression()
35# CHECK-DAG:  DBG_VALUE $esi, $noreg, ![[Y_VAR]], !DIExpression()
36# CHECK-DAG:  DBG_VALUE $edx, $noreg, ![[Z_VAR]], !DIExpression()
37# CHECK:      RET
38
39--- |
40  ; ModuleID = 'live-debug-values-3preds.ll'
41  target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
42  target triple = "x86_64-unknown-linux-gnu"
43
44  ; Function Attrs: norecurse nounwind readnone uwtable
45  define i32 @add(i32 %x, i32 %y, i32 %z, i32 %a) #0 !dbg !4 {
46  entry:
47    tail call void @llvm.dbg.value(metadata i32 %x, i64 0, metadata !9, metadata !17), !dbg !18
48    tail call void @llvm.dbg.value(metadata i32 %y, i64 0, metadata !10, metadata !17), !dbg !19
49    tail call void @llvm.dbg.value(metadata i32 %z, i64 0, metadata !11, metadata !17), !dbg !21
50    tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !12, metadata !17), !dbg !23
51    tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !13, metadata !17), !dbg !25
52    %mul = mul nsw i32 %y, %x, !dbg !26
53    %cmp.24 = icmp sgt i32 %mul, 0, !dbg !30
54    br i1 %cmp.24, label %for.body.preheader, label %for.end, !dbg !31
55
56  for.body.preheader:                               ; preds = %entry
57    br label %for.body, !dbg !32
58
59  for.cond:                                         ; preds = %if.end.6
60    %cmp = icmp slt i32 %inc, %mul, !dbg !30
61    br i1 %cmp, label %for.body, label %for.end, !dbg !31
62
63  for.body:                                         ; preds = %for.cond, %for.body.preheader
64    %i.025 = phi i32 [ %inc, %for.cond ], [ 0, %for.body.preheader ]
65    %0 = icmp sgt i32 %x, 0
66    br i1 %0, label %if.then, label %if.end, !dbg !35
67
68  if.then:                                          ; preds = %for.body
69    %mul2 = mul nsw i32 %a, %x, !dbg !36
70    tail call void @llvm.dbg.value(metadata i32 %mul2, i64 0, metadata !12, metadata !17), !dbg !23
71    br label %for.end, !dbg !38
72
73  if.end:                                           ; preds = %for.body
74    %1 = icmp sgt i32 %y, 0
75    br i1 %1, label %if.then.4, label %if.end.6, !dbg !39
76
77  if.then.4:                                        ; preds = %if.end
78    %mul5 = mul nsw i32 %a, %y, !dbg !40
79    tail call void @llvm.dbg.value(metadata i32 %mul5, i64 0, metadata !12, metadata !17), !dbg !23
80    br label %for.end, !dbg !43
81
82  if.end.6:                                         ; preds = %if.end
83    %2 = icmp sgt i32 %z, 0
84    %inc = add nuw nsw i32 %i.025, 1, !dbg !44
85    tail call void @llvm.dbg.value(metadata i32 %inc, i64 0, metadata !13, metadata !17), !dbg !25
86    br i1 %2, label %if.then.8, label %for.cond, !dbg !45
87
88  if.then.8:                                        ; preds = %if.end.6
89    %mul9 = mul nsw i32 %a, %z, !dbg !46
90    tail call void @llvm.dbg.value(metadata i32 %mul9, i64 0, metadata !12, metadata !17), !dbg !23
91    br label %for.end, !dbg !49
92
93  for.end:                                          ; preds = %for.cond, %if.then.8, %if.then.4, %if.then, %entry
94    %a.addr.0 = phi i32 [ %mul2, %if.then ], [ %mul5, %if.then.4 ], [ %mul9, %if.then.8 ], [ %a, %entry ], [ %a, %for.cond ]
95    ret i32 %a.addr.0, !dbg !50
96  }
97
98  ; Function Attrs: nounwind readnone
99  declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
100
101  attributes #0 = { norecurse nounwind readnone uwtable }
102  attributes #1 = { nounwind readnone }
103
104  !llvm.dbg.cu = !{!0}
105  !llvm.module.flags = !{!14, !15}
106  !llvm.ident = !{!16}
107
108  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 253049) ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
109  !1 = !DIFile(filename: "LiveDebugValues-3preds.c", directory: "/home/vt/julia/test/tvvikram")
110  !2 = !{}
111  !4 = distinct !DISubprogram(name: "add", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)
112  !5 = !DISubroutineType(types: !6)
113  !6 = !{!7, !7, !7, !7, !7}
114  !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
115  !8 = !{!9, !10, !11, !12, !13}
116  !9 = !DILocalVariable(name: "x", arg: 1, scope: !4, file: !1, line: 1, type: !7)
117  !10 = !DILocalVariable(name: "y", arg: 2, scope: !4, file: !1, line: 1, type: !7)
118  !11 = !DILocalVariable(name: "z", arg: 3, scope: !4, file: !1, line: 1, type: !7)
119  !12 = !DILocalVariable(name: "a", arg: 4, scope: !4, file: !1, line: 1, type: !7)
120  !13 = !DILocalVariable(name: "i", scope: !4, file: !1, line: 2, type: !7)
121  !14 = !{i32 2, !"Dwarf Version", i32 4}
122  !15 = !{i32 2, !"Debug Info Version", i32 3}
123  !16 = !{!"clang version 3.8.0 (trunk 253049) "}
124  !17 = !DIExpression()
125  !18 = !DILocation(line: 1, column: 13, scope: !4)
126  !19 = !DILocation(line: 1, column: 20, scope: !20)
127  !20 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 1)
128  !21 = !DILocation(line: 1, column: 27, scope: !22)
129  !22 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 2)
130  !23 = !DILocation(line: 1, column: 34, scope: !24)
131  !24 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 3)
132  !25 = !DILocation(line: 2, column: 7, scope: !20)
133  !26 = !DILocation(line: 3, column: 21, scope: !27)
134  !27 = !DILexicalBlockFile(scope: !28, file: !1, discriminator: 1)
135  !28 = distinct !DILexicalBlock(scope: !29, file: !1, line: 3, column: 3)
136  !29 = distinct !DILexicalBlock(scope: !4, file: !1, line: 3, column: 3)
137  !30 = !DILocation(line: 3, column: 17, scope: !27)
138  !31 = !DILocation(line: 3, column: 3, scope: !27)
139  !32 = !DILocation(line: 4, column: 11, scope: !33)
140  !33 = distinct !DILexicalBlock(scope: !34, file: !1, line: 4, column: 9)
141  !34 = distinct !DILexicalBlock(scope: !28, file: !1, line: 3, column: 31)
142  !35 = !DILocation(line: 4, column: 9, scope: !34)
143  !36 = !DILocation(line: 5, column: 13, scope: !37)
144  !37 = distinct !DILexicalBlock(scope: !33, file: !1, line: 4, column: 16)
145  !38 = !DILocation(line: 6, column: 7, scope: !37)
146  !39 = !DILocation(line: 8, column: 9, scope: !34)
147  !40 = !DILocation(line: 9, column: 13, scope: !41)
148  !41 = distinct !DILexicalBlock(scope: !42, file: !1, line: 8, column: 16)
149  !42 = distinct !DILexicalBlock(scope: !34, file: !1, line: 8, column: 9)
150  !43 = !DILocation(line: 10, column: 7, scope: !41)
151  !44 = !DILocation(line: 3, column: 27, scope: !28)
152  !45 = !DILocation(line: 12, column: 9, scope: !34)
153  !46 = !DILocation(line: 13, column: 13, scope: !47)
154  !47 = distinct !DILexicalBlock(scope: !48, file: !1, line: 12, column: 16)
155  !48 = distinct !DILexicalBlock(scope: !34, file: !1, line: 12, column: 9)
156  !49 = !DILocation(line: 14, column: 7, scope: !47)
157  !50 = !DILocation(line: 17, column: 3, scope: !4)
158
159...
160---
161name:            add
162alignment:       16
163exposesReturnsTwice: false
164tracksRegLiveness: true
165liveins:
166  - { reg: '$edi' }
167  - { reg: '$esi' }
168  - { reg: '$edx' }
169  - { reg: '$ecx' }
170frameInfo:
171  isFrameAddressTaken: false
172  isReturnAddressTaken: false
173  hasStackMap:     false
174  hasPatchPoint:   false
175  stackSize:       0
176  offsetAdjustment: 0
177  maxAlignment:    0
178  adjustsStack:    false
179  hasCalls:        false
180  maxCallFrameSize: 0
181  hasOpaqueSPAdjustment: false
182  hasVAStart:      false
183  hasMustTailInVarArgFunc: false
184body:             |
185  bb.0.entry:
186    successors: %bb.1.for.body.preheader(20), %bb.9.for.end(12)
187    liveins: $ecx, $edi, $edx, $esi
188
189    DBG_VALUE $edi, _, !9, !17, debug-location !18
190    DBG_VALUE $esi, _, !10, !17, debug-location !19
191    DBG_VALUE $edx, _, !11, !17, debug-location !21
192    DBG_VALUE $ecx, _, !12, !17, debug-location !23
193    DBG_VALUE 0, 0, !13, !17, debug-location !25
194    $r8d = MOV32rr $esi, debug-location !26
195    $r8d = IMUL32rr killed $r8d, $edi, implicit-def dead $eflags, debug-location !26
196    TEST32rr $r8d, $r8d, implicit-def $eflags, debug-location !31
197    JCC_1 %bb.9.for.end, 14, implicit $eflags
198
199  bb.1.for.body.preheader:
200    successors: %bb.3.for.body(0)
201    liveins: $ecx, $edi, $edx, $esi, $r8d
202
203    DBG_VALUE $edi, _, !9, !17, debug-location !18
204    DBG_VALUE $esi, _, !10, !17, debug-location !19
205    DBG_VALUE $edx, _, !11, !17, debug-location !21
206    DBG_VALUE $ecx, _, !12, !17, debug-location !23
207    DBG_VALUE 0, 0, !13, !17, debug-location !25
208    $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags
209
210  bb.3.for.body (align 4):
211    successors: %bb.4.if.then(4), %bb.5.if.end(124)
212    liveins: $eax, $ecx, $edi, $edx, $esi, $r8d
213
214    DBG_VALUE $edi, _, !9, !17, debug-location !18
215    DBG_VALUE $esi, _, !10, !17, debug-location !19
216    DBG_VALUE $edx, _, !11, !17, debug-location !21
217    DBG_VALUE $ecx, _, !12, !17, debug-location !23
218    DBG_VALUE 0, 0, !13, !17, debug-location !25
219    TEST32rr $edi, $edi, implicit-def $eflags, debug-location !35
220    JCC_1 %bb.4.if.then, 15, implicit $eflags
221
222  bb.5.if.end:
223    successors: %bb.6.if.then.4(4), %bb.7.if.end.6(124)
224    liveins: $eax, $ecx, $edi, $edx, $esi, $r8d
225
226    DBG_VALUE $edi, _, !9, !17, debug-location !18
227    DBG_VALUE $esi, _, !10, !17, debug-location !19
228    DBG_VALUE $edx, _, !11, !17, debug-location !21
229    DBG_VALUE $ecx, _, !12, !17, debug-location !23
230    DBG_VALUE 0, 0, !13, !17, debug-location !25
231    TEST32rr $esi, $esi, implicit-def $eflags, debug-location !39
232    JCC_1 %bb.6.if.then.4, 15, implicit $eflags
233
234  bb.7.if.end.6:
235    successors: %bb.8.if.then.8(4), %bb.2.for.cond(124)
236    liveins: $eax, $ecx, $edi, $edx, $esi, $r8d
237
238    DBG_VALUE $edi, _, !9, !17, debug-location !18
239    DBG_VALUE $esi, _, !10, !17, debug-location !19
240    DBG_VALUE $edx, _, !11, !17, debug-location !21
241    DBG_VALUE $ecx, _, !12, !17, debug-location !23
242    DBG_VALUE 0, 0, !13, !17, debug-location !25
243    TEST32rr $edx, $edx, implicit-def $eflags, debug-location !45
244    JCC_1 %bb.8.if.then.8, 15, implicit $eflags
245
246  bb.2.for.cond:
247    successors: %bb.3.for.body(124), %bb.9.for.end(4)
248    liveins: $eax, $ecx, $edi, $edx, $esi, $r8d
249
250    DBG_VALUE $edi, _, !9, !17, debug-location !18
251    DBG_VALUE $esi, _, !10, !17, debug-location !19
252    DBG_VALUE $edx, _, !11, !17, debug-location !21
253    DBG_VALUE $ecx, _, !12, !17, debug-location !23
254    DBG_VALUE 0, 0, !13, !17, debug-location !25
255    $eax = INC32r killed $eax, implicit-def dead $eflags, debug-location !44
256    DBG_VALUE $eax, _, !13, !17, debug-location !25
257    CMP32rr $eax, $r8d, implicit-def $eflags, debug-location !31
258    JCC_1 %bb.3.for.body, 12, implicit $eflags
259    JMP_1 %bb.9.for.end
260
261  bb.4.if.then:
262    liveins: $ecx, $edi
263
264    DBG_VALUE $edi, _, !9, !17, debug-location !18
265    DBG_VALUE $ecx, _, !12, !17, debug-location !23
266    DBG_VALUE 0, 0, !13, !17, debug-location !25
267    $ecx = IMUL32rr killed $ecx, killed $edi, implicit-def dead $eflags, debug-location !36
268    DBG_VALUE 0, 0, !13, !17, debug-location !25
269    $eax = MOV32rr killed $ecx, debug-location !50
270    RETQ $eax, debug-location !50
271
272  bb.6.if.then.4:
273    liveins: $ecx, $esi
274
275    DBG_VALUE $esi, _, !10, !17, debug-location !19
276    DBG_VALUE $ecx, _, !12, !17, debug-location !23
277    DBG_VALUE 0, 0, !13, !17, debug-location !25
278    $ecx = IMUL32rr killed $ecx, killed $esi, implicit-def dead $eflags, debug-location !40
279    DBG_VALUE 0, 0, !13, !17, debug-location !25
280    $eax = MOV32rr killed $ecx, debug-location !50
281    RETQ $eax, debug-location !50
282
283  bb.8.if.then.8:
284    successors: %bb.9.for.end(0)
285    liveins: $ecx, $edx
286
287    DBG_VALUE $edx, _, !11, !17, debug-location !21
288    DBG_VALUE $ecx, _, !12, !17, debug-location !23
289    DBG_VALUE 0, 0, !13, !17, debug-location !25
290    $ecx = IMUL32rr killed $ecx, killed $edx, implicit-def dead $eflags, debug-location !46
291
292  bb.9.for.end:
293    liveins: $ecx
294
295    DBG_VALUE 0, 0, !13, !17, debug-location !25
296    $eax = MOV32rr killed $ecx, debug-location !50
297    RETQ $eax, debug-location !50
298
299...
300