1; RUN: llc < %s -filetype=obj | llvm-readobj - -codeview | FileCheck %s
2;
3; -- lexicablock.cxx begin ----------------------------------------------------
4; int main(int argc, char *argv[]) {
5;   int localA = 1;
6;
7;   { // S_BLOCK32 not emitted because it has multiple address ranges.
8;     int localB = 2;
9;
10;     if (__builtin_expect(argc != 1, 0)) { // S_BLOCK32 containing 'localC'
11;       int localC = 3;
12;     }
13;   }
14;
15;   { // S_BLOCK32 containing 'localD'
16;     int localD = 4;
17;     localA = localD;
18;   }
19;
20;   { // S_BLOCK32 not emitted
21;     { // S_BLOCK32 containing 'localE'
22;       int localE = 5;
23;       localA = localE;
24;     }
25;   }
26;
27;   { // S_BLOCK32 containing 'localF'
28;     int localF = 6;
29;     localA = localF;
30;
31;     { // S_BLOCK32 containing 'localG'
32;       int localG = 7;
33;       localA = localG;
34;     }
35;   }
36;
37;   if (localA == 7) { // S_BLOCK32 containing 'localH'
38;     int localH = 8;
39;     localA = localH;
40;   }
41;
42;   return localA != 8 ? -1 : 0;
43; }
44; -- lexicalblock.cxx end -----------------------------------------------------
45;
46; To regenerate the IR below:
47;   $ clang -cc1 -triple i686-pc-windows -emit-llvm -o lexicalblock.tmp -debug-info-kind=limited -gcodeview lexicablock.cxx -O1 -disable-llvm-passes
48;   $ opt -lower-expect -S -o lexicalblock.ll < lexicalblock.tmp
49;
50; The commands above split the lexical block containing localB and localC into
51; two parts, thus creating multiple ranges for the containing lexical block
52; without optimizing out the whole thing.
53;
54; CHECK: {{.*}}Proc{{.*}}Sym {
55; CHECK:   DisplayName: main
56; CHECK: }
57; CHECK: LocalSym {
58; CHECK:   VarName: argc
59; CHECK: }
60; CHECK: LocalSym {
61; CHECK:   VarName: argv
62; CHECK: }
63; CHECK: LocalSym {
64; CHECK:   VarName: localA
65; CHECK: }
66; CHECK: LocalSym {
67; CHECK:   VarName: localB
68; CHECK: }
69; CHECK: BlockSym {
70; CHECK:   Kind: S_BLOCK32 {{.*}}
71; CHECK:   BlockName:
72; CHECK: }
73; CHECK: LocalSym {
74; CHECK:   VarName: localC
75; CHECK: }
76; CHECK: ScopeEndSym {
77; CHECK:   Kind: S_END {{.*}}
78; CHECK: }
79; CHECK: BlockSym {
80; CHECK:   Kind: S_BLOCK32 {{.*}}
81; CHECK:   BlockName:
82; CHECK: }
83; CHECK: LocalSym {
84; CHECK:   VarName: localD
85; CHECK: }
86; CHECK: ScopeEndSym {
87; CHECK:   Kind: S_END {{.*}}
88; CHECK: }
89; CHECK: BlockSym {
90; CHECK:   Kind: S_BLOCK32 {{.*}}
91; CHECK:   BlockName:
92; CHECK: }
93; CHECK: LocalSym {
94; CHECK:   VarName: localE
95; CHECK: }
96; CHECK: ScopeEndSym {
97; CHECK: }
98; CHECK: BlockSym {
99; CHECK:   Kind: S_BLOCK32 {{.*}}
100; CHECK:   BlockName:
101; CHECK: }
102; CHECK: LocalSym {
103; CHECK:   VarName: localF
104; CHECK: }
105; CHECK: BlockSym {
106; CHECK:   Kind: S_BLOCK32 {{.*}}
107; CHECK:   BlockName:
108; CHECK: }
109; CHECK: LocalSym {
110; CHECK:   VarName: localG
111; CHECK: }
112; CHECK: ScopeEndSym {
113; CHECK:   Kind: S_END {{.*}}
114; CHECK: }
115; CHECK: ScopeEndSym {
116; CHECK:   Kind: S_END {{.*}}
117; CHECK: }
118; CHECK: BlockSym {
119; CHECK:   Kind: S_BLOCK32 {{.*}}
120; CHECK:   BlockName:
121; CHECK: }
122; CHECK: LocalSym {
123; CHECK:   VarName: localH
124; CHECK: }
125; CHECK: ScopeEndSym {
126; CHECK:   Kind: S_END {{.*}}
127; CHECK: }
128; CHECK: ProcEnd {
129; CHECK: }
130;
131; ModuleID = 'lexicalblock.cxx'
132source_filename = "lexicalblock.cxx"
133target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
134target triple = "i686-pc-windows-msvc"
135
136; Function Attrs: norecurse nounwind
137define i32 @main(i32 %argc, i8** %argv) #0 !dbg !8 {
138entry:
139  %retval = alloca i32, align 4
140  %argv.addr = alloca i8**, align 4
141  %argc.addr = alloca i32, align 4
142  %localA = alloca i32, align 4
143  %localB = alloca i32, align 4
144  %localC = alloca i32, align 4
145  %localD = alloca i32, align 4
146  %localE = alloca i32, align 4
147  %localF = alloca i32, align 4
148  %localG = alloca i32, align 4
149  %localH = alloca i32, align 4
150  store i32 0, i32* %retval, align 4
151  store i8** %argv, i8*** %argv.addr, align 4, !tbaa !37
152  call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !17, metadata !DIExpression()), !dbg !41
153  store i32 %argc, i32* %argc.addr, align 4, !tbaa !42
154  call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !18, metadata !DIExpression()), !dbg !41
155  %0 = bitcast i32* %localA to i8*, !dbg !44
156  call void @llvm.lifetime.start.p0i8(i64 4, i8* %0) #4, !dbg !44
157  call void @llvm.dbg.declare(metadata i32* %localA, metadata !19, metadata !DIExpression()), !dbg !44
158  store i32 1, i32* %localA, align 4, !dbg !44, !tbaa !42
159  %1 = bitcast i32* %localB to i8*, !dbg !45
160  call void @llvm.lifetime.start.p0i8(i64 4, i8* %1) #4, !dbg !45
161  call void @llvm.dbg.declare(metadata i32* %localB, metadata !20, metadata !DIExpression()), !dbg !45
162  store i32 2, i32* %localB, align 4, !dbg !45, !tbaa !42
163  %2 = load i32, i32* %argc.addr, align 4, !dbg !46, !tbaa !42
164  %cmp = icmp ne i32 %2, 1, !dbg !46
165  %conv = zext i1 %cmp to i32, !dbg !46
166  %tobool = icmp ne i32 %conv, 0, !dbg !46
167  br i1 %tobool, label %if.then, label %if.end, !dbg !46, !prof !47
168
169if.then:                                          ; preds = %entry
170  %3 = bitcast i32* %localC to i8*, !dbg !48
171  call void @llvm.lifetime.start.p0i8(i64 4, i8* %3) #4, !dbg !48
172  call void @llvm.dbg.declare(metadata i32* %localC, metadata !22, metadata !DIExpression()), !dbg !48
173  store i32 3, i32* %localC, align 4, !dbg !48, !tbaa !42
174  %4 = bitcast i32* %localC to i8*, !dbg !49
175  call void @llvm.lifetime.end.p0i8(i64 4, i8* %4) #4, !dbg !49
176  br label %if.end, !dbg !49
177
178if.end:                                           ; preds = %if.then, %entry
179  %5 = bitcast i32* %localB to i8*, !dbg !50
180  call void @llvm.lifetime.end.p0i8(i64 4, i8* %5) #4, !dbg !50
181  %6 = bitcast i32* %localD to i8*, !dbg !51
182  call void @llvm.lifetime.start.p0i8(i64 4, i8* %6) #4, !dbg !51
183  call void @llvm.dbg.declare(metadata i32* %localD, metadata !25, metadata !DIExpression()), !dbg !51
184  store i32 4, i32* %localD, align 4, !dbg !51, !tbaa !42
185  %7 = load i32, i32* %localD, align 4, !dbg !52, !tbaa !42
186  store i32 %7, i32* %localA, align 4, !dbg !52, !tbaa !42
187  %8 = bitcast i32* %localD to i8*, !dbg !53
188  call void @llvm.lifetime.end.p0i8(i64 4, i8* %8) #4, !dbg !53
189  %9 = bitcast i32* %localE to i8*, !dbg !54
190  call void @llvm.lifetime.start.p0i8(i64 4, i8* %9) #4, !dbg !54
191  call void @llvm.dbg.declare(metadata i32* %localE, metadata !27, metadata !DIExpression()), !dbg !54
192  store i32 5, i32* %localE, align 4, !dbg !54, !tbaa !42
193  %10 = load i32, i32* %localE, align 4, !dbg !55, !tbaa !42
194  store i32 %10, i32* %localA, align 4, !dbg !55, !tbaa !42
195  %11 = bitcast i32* %localE to i8*, !dbg !56
196  call void @llvm.lifetime.end.p0i8(i64 4, i8* %11) #4, !dbg !56
197  %12 = bitcast i32* %localF to i8*, !dbg !57
198  call void @llvm.lifetime.start.p0i8(i64 4, i8* %12) #4, !dbg !57
199  call void @llvm.dbg.declare(metadata i32* %localF, metadata !30, metadata !DIExpression()), !dbg !57
200  store i32 6, i32* %localF, align 4, !dbg !57, !tbaa !42
201  %13 = load i32, i32* %localF, align 4, !dbg !58, !tbaa !42
202  store i32 %13, i32* %localA, align 4, !dbg !58, !tbaa !42
203  %14 = bitcast i32* %localG to i8*, !dbg !59
204  call void @llvm.lifetime.start.p0i8(i64 4, i8* %14) #4, !dbg !59
205  call void @llvm.dbg.declare(metadata i32* %localG, metadata !32, metadata !DIExpression()), !dbg !59
206  store i32 7, i32* %localG, align 4, !dbg !59, !tbaa !42
207  %15 = load i32, i32* %localG, align 4, !dbg !60, !tbaa !42
208  store i32 %15, i32* %localA, align 4, !dbg !60, !tbaa !42
209  %16 = bitcast i32* %localG to i8*, !dbg !61
210  call void @llvm.lifetime.end.p0i8(i64 4, i8* %16) #4, !dbg !61
211  %17 = bitcast i32* %localF to i8*, !dbg !62
212  call void @llvm.lifetime.end.p0i8(i64 4, i8* %17) #4, !dbg !62
213  %18 = load i32, i32* %localA, align 4, !dbg !63, !tbaa !42
214  %cmp1 = icmp eq i32 %18, 7, !dbg !63
215  br i1 %cmp1, label %if.then2, label %if.end3, !dbg !63
216
217if.then2:                                         ; preds = %if.end
218  %19 = bitcast i32* %localH to i8*, !dbg !64
219  call void @llvm.lifetime.start.p0i8(i64 4, i8* %19) #4, !dbg !64
220  call void @llvm.dbg.declare(metadata i32* %localH, metadata !34, metadata !DIExpression()), !dbg !64
221  store i32 8, i32* %localH, align 4, !dbg !64, !tbaa !42
222  %20 = load i32, i32* %localH, align 4, !dbg !65, !tbaa !42
223  store i32 %20, i32* %localA, align 4, !dbg !65, !tbaa !42
224  %21 = bitcast i32* %localH to i8*, !dbg !66
225  call void @llvm.lifetime.end.p0i8(i64 4, i8* %21) #4, !dbg !66
226  br label %if.end3, !dbg !66
227
228if.end3:                                          ; preds = %if.then2, %if.end
229  %22 = load i32, i32* %localA, align 4, !dbg !67, !tbaa !42
230  %cmp4 = icmp ne i32 %22, 8, !dbg !67
231  %23 = zext i1 %cmp4 to i64, !dbg !67
232  %cond = select i1 %cmp4, i32 -1, i32 0, !dbg !67
233  %24 = bitcast i32* %localA to i8*, !dbg !68
234  call void @llvm.lifetime.end.p0i8(i64 4, i8* %24) #4, !dbg !68
235  ret i32 %cond, !dbg !67
236}
237
238; Function Attrs: nounwind readnone speculatable
239declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
240
241; Function Attrs: argmemonly nounwind
242declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #2
243
244; Function Attrs: nounwind readnone
245declare i32 @llvm.expect.i32(i32, i32) #3
246
247; Function Attrs: argmemonly nounwind
248declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #2
249
250attributes #0 = { norecurse nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
251attributes #1 = { nounwind readnone speculatable }
252attributes #2 = { argmemonly nounwind }
253attributes #3 = { nounwind readnone }
254attributes #4 = { nounwind }
255
256!llvm.dbg.cu = !{!0}
257!llvm.module.flags = !{!3, !4, !5, !6}
258!llvm.ident = !{!7}
259
260!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 7.0.0 (trunk)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
261!1 = !DIFile(filename: "<stdin>", directory: "C:/path/to/directory", checksumkind: CSK_MD5, checksum: "169b810b4f895de9a9e19d8d0634af5d")
262!2 = !{}
263!3 = !{i32 1, !"NumRegisterParameters", i32 0}
264!4 = !{i32 2, !"CodeView", i32 1}
265!5 = !{i32 2, !"Debug Info Version", i32 3}
266!6 = !{i32 1, !"wchar_size", i32 2}
267!7 = !{!"clang version 7.0.0 (trunk)"}
268!8 = distinct !DISubprogram(name: "main", scope: !9, file: !9, line: 1, type: !10, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !16)
269!9 = !DIFile(filename: "lexicalblock.cxx", directory: "C:/path/to/directory", checksumkind: CSK_MD5, checksum: "169b810b4f895de9a9e19d8d0634af5d")
270!10 = !DISubroutineType(types: !11)
271!11 = !{!12, !12, !13}
272!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
273!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 32)
274!14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 32)
275!15 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
276!16 = !{!17, !18, !19, !20, !22, !25, !27, !30, !32, !34}
277!17 = !DILocalVariable(name: "argv", arg: 2, scope: !8, file: !9, line: 1, type: !13)
278!18 = !DILocalVariable(name: "argc", arg: 1, scope: !8, file: !9, line: 1, type: !12)
279!19 = !DILocalVariable(name: "localA", scope: !8, file: !9, line: 2, type: !12)
280!20 = !DILocalVariable(name: "localB", scope: !21, file: !9, line: 5, type: !12)
281!21 = distinct !DILexicalBlock(scope: !8, file: !9, line: 4)
282!22 = !DILocalVariable(name: "localC", scope: !23, file: !9, line: 8, type: !12)
283!23 = distinct !DILexicalBlock(scope: !24, file: !9, line: 7)
284!24 = distinct !DILexicalBlock(scope: !21, file: !9, line: 7)
285!25 = !DILocalVariable(name: "localD", scope: !26, file: !9, line: 13, type: !12)
286!26 = distinct !DILexicalBlock(scope: !8, file: !9, line: 12)
287!27 = !DILocalVariable(name: "localE", scope: !28, file: !9, line: 19, type: !12)
288!28 = distinct !DILexicalBlock(scope: !29, file: !9, line: 18)
289!29 = distinct !DILexicalBlock(scope: !8, file: !9, line: 17)
290!30 = !DILocalVariable(name: "localF", scope: !31, file: !9, line: 25, type: !12)
291!31 = distinct !DILexicalBlock(scope: !8, file: !9, line: 24)
292!32 = !DILocalVariable(name: "localG", scope: !33, file: !9, line: 29, type: !12)
293!33 = distinct !DILexicalBlock(scope: !31, file: !9, line: 28)
294!34 = !DILocalVariable(name: "localH", scope: !35, file: !9, line: 35, type: !12)
295!35 = distinct !DILexicalBlock(scope: !36, file: !9, line: 34)
296!36 = distinct !DILexicalBlock(scope: !8, file: !9, line: 34)
297!37 = !{!38, !38, i64 0}
298!38 = !{!"any pointer", !39, i64 0}
299!39 = !{!"omnipotent char", !40, i64 0}
300!40 = !{!"Simple C++ TBAA"}
301!41 = !DILocation(line: 1, scope: !8)
302!42 = !{!43, !43, i64 0}
303!43 = !{!"int", !39, i64 0}
304!44 = !DILocation(line: 2, scope: !8)
305!45 = !DILocation(line: 5, scope: !21)
306!46 = !DILocation(line: 7, scope: !21)
307!47 = !{!"branch_weights", i32 1, i32 2000}
308!48 = !DILocation(line: 8, scope: !23)
309!49 = !DILocation(line: 9, scope: !23)
310!50 = !DILocation(line: 10, scope: !21)
311!51 = !DILocation(line: 13, scope: !26)
312!52 = !DILocation(line: 14, scope: !26)
313!53 = !DILocation(line: 15, scope: !26)
314!54 = !DILocation(line: 19, scope: !28)
315!55 = !DILocation(line: 20, scope: !28)
316!56 = !DILocation(line: 21, scope: !28)
317!57 = !DILocation(line: 25, scope: !31)
318!58 = !DILocation(line: 26, scope: !31)
319!59 = !DILocation(line: 29, scope: !33)
320!60 = !DILocation(line: 30, scope: !33)
321!61 = !DILocation(line: 31, scope: !33)
322!62 = !DILocation(line: 32, scope: !31)
323!63 = !DILocation(line: 34, scope: !8)
324!64 = !DILocation(line: 35, scope: !35)
325!65 = !DILocation(line: 36, scope: !35)
326!66 = !DILocation(line: 37, scope: !35)
327!67 = !DILocation(line: 39, scope: !8)
328!68 = !DILocation(line: 40, scope: !8)
329