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' 132 source_filename = "lexicalblock.cxx" 133 target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 134 target triple = "i686-pc-windows-msvc" 135 136 ; Function Attrs: norecurse nounwind 137 define i32 @main(i32 %argc, i8** %argv) #0 !dbg !8 { 138 entry: 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 !47 168 169 if.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 !49 177 178 if.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 !63 216 217 if.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 !66 227 228 if.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 239 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 240 241 ; Function Attrs: argmemonly nounwind 242 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #2 243 244 ; Function Attrs: nounwind readnone 245 declare i32 @llvm.expect.i32(i32, i32) #3 246 247 ; Function Attrs: argmemonly nounwind 248 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #2 249 250 attributes #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" } 251 attributes #1 = { nounwind readnone speculatable } 252 attributes #2 = { argmemonly nounwind } 253 attributes #3 = { nounwind readnone } 254 attributes #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
