1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2 2; RUN: opt -passes='default<O0>,mergefunc' -S -mergefunc-preserve-debug-info < %s | FileCheck %s --check-prefix=OPTIMIZATION_LEVEL_0 3; RUN: opt -passes='default<O2>,mergefunc' -S -mergefunc-preserve-debug-info < %s | FileCheck %s --check-prefix=OPTIMIZATION_LEVEL_2 4 5;; Does this continue to work under non-intrinsic debug-info? 6; RUN: opt -passes='default<O0>,mergefunc' -S -mergefunc-preserve-debug-info < %s --try-experimental-debuginfo-iterators | FileCheck %s --check-prefix=OPTIMIZATION_LEVEL_0 7; RUN: opt -passes='default<O2>,mergefunc' -S -mergefunc-preserve-debug-info < %s --try-experimental-debuginfo-iterators | FileCheck %s --check-prefix=OPTIMIZATION_LEVEL_2 8 9; Preserve debug info in thunks under -passes=mergefunc -mergefunc-preserve-debug-info 10; 11; We test that: 12; At -O0 we have preserved the generated @llvm.dbg.declare debug intrinsics. 13; At -O2 we have preserved the generated @llvm.dbg.value debug intrinsics. 14; At -O0, stores from the incoming parameters to locations on the stack-frame 15; and allocas that create these locations on the stack-frame are preserved. 16; Debug info got generated for the call made by the thunk and for its return value. 17; The foregoing is the only content of a thunk's entry block. 18; A thunk makes a tail call to the shared implementation. 19; A thunk's call site is preserved to point to the thunk (with only -passes=mergefunc the 20; call site is modified to point to the shared implementation) when both occur 21; within the same translation unit. 22 23; The source code that was used to test and generate this LLVM IR is: 24; 25; int maxA(int x, int y) { 26; int i, m, j; 27; if (x > y) 28; m = x; 29; else 30; m = y; 31; return m; 32; } 33; 34; int maxB(int x, int y) { 35; int i, m, j; 36; if (x > y) 37; m = x; 38; else 39; m = y; 40; return m; 41; } 42; 43; void f(void) { 44; 45; maxA(3, 4); 46; maxB(1, 9); 47; } 48 49; Function Attrs: nounwind uwtable 50define i32 @maxA(i32 %x, i32 %y) !dbg !6 { 51; OPTIMIZATION_LEVEL_0-LABEL: define i32 @maxA 52; OPTIMIZATION_LEVEL_0-SAME: (i32 [[X:%.*]], i32 [[Y:%.*]]) !dbg [[DBG6:![0-9]+]] { 53; OPTIMIZATION_LEVEL_0-NEXT: entry: 54; OPTIMIZATION_LEVEL_0-NEXT: [[X_ADDR:%.*]] = alloca i32, align 4 55; OPTIMIZATION_LEVEL_0-NEXT: [[Y_ADDR:%.*]] = alloca i32, align 4 56; OPTIMIZATION_LEVEL_0-NEXT: [[I:%.*]] = alloca i32, align 4 57; OPTIMIZATION_LEVEL_0-NEXT: [[M:%.*]] = alloca i32, align 4 58; OPTIMIZATION_LEVEL_0-NEXT: [[J:%.*]] = alloca i32, align 4 59; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[X]], ptr [[X_ADDR]], align 4 60; OPTIMIZATION_LEVEL_0-NEXT: #dbg_declare(ptr [[X_ADDR]], [[META11:![0-9]+]], !DIExpression(), [[META12:![0-9]+]]) 61; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[Y]], ptr [[Y_ADDR]], align 4 62; OPTIMIZATION_LEVEL_0-NEXT: #dbg_declare(ptr [[Y_ADDR]], [[META13:![0-9]+]], !DIExpression(), [[META14:![0-9]+]]) 63; OPTIMIZATION_LEVEL_0-NEXT: #dbg_declare(ptr [[I]], [[META15:![0-9]+]], !DIExpression(), [[META16:![0-9]+]]) 64; OPTIMIZATION_LEVEL_0-NEXT: #dbg_declare(ptr [[M]], [[META17:![0-9]+]], !DIExpression(), [[META18:![0-9]+]]) 65; OPTIMIZATION_LEVEL_0-NEXT: #dbg_declare(ptr [[J]], [[META19:![0-9]+]], !DIExpression(), [[META20:![0-9]+]]) 66; OPTIMIZATION_LEVEL_0-NEXT: [[TMP0:%.*]] = load i32, ptr [[X_ADDR]], align 4, !dbg [[DBG21:![0-9]+]] 67; OPTIMIZATION_LEVEL_0-NEXT: [[TMP1:%.*]] = load i32, ptr [[Y_ADDR]], align 4, !dbg [[DBG23:![0-9]+]] 68; OPTIMIZATION_LEVEL_0-NEXT: [[CMP:%.*]] = icmp sgt i32 [[TMP0]], [[TMP1]], !dbg [[DBG24:![0-9]+]] 69; OPTIMIZATION_LEVEL_0-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]], !dbg [[DBG25:![0-9]+]] 70; OPTIMIZATION_LEVEL_0: if.then: 71; OPTIMIZATION_LEVEL_0-NEXT: [[TMP2:%.*]] = load i32, ptr [[X_ADDR]], align 4, !dbg [[DBG26:![0-9]+]] 72; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[TMP2]], ptr [[M]], align 4, !dbg [[DBG27:![0-9]+]] 73; OPTIMIZATION_LEVEL_0-NEXT: br label [[IF_END:%.*]], !dbg [[DBG28:![0-9]+]] 74; OPTIMIZATION_LEVEL_0: if.else: 75; OPTIMIZATION_LEVEL_0-NEXT: [[TMP3:%.*]] = load i32, ptr [[Y_ADDR]], align 4, !dbg [[DBG29:![0-9]+]] 76; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[TMP3]], ptr [[M]], align 4, !dbg [[DBG30:![0-9]+]] 77; OPTIMIZATION_LEVEL_0-NEXT: br label [[IF_END]] 78; OPTIMIZATION_LEVEL_0: if.end: 79; OPTIMIZATION_LEVEL_0-NEXT: [[TMP4:%.*]] = load i32, ptr [[M]], align 4, !dbg [[DBG31:![0-9]+]] 80; OPTIMIZATION_LEVEL_0-NEXT: ret i32 [[TMP4]], !dbg [[DBG32:![0-9]+]] 81; 82; OPTIMIZATION_LEVEL_2-LABEL: define i32 @maxA 83; OPTIMIZATION_LEVEL_2-SAME: (i32 [[X:%.*]], i32 [[Y:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] !dbg [[DBG6:![0-9]+]] { 84; OPTIMIZATION_LEVEL_2-NEXT: entry: 85; OPTIMIZATION_LEVEL_2-NEXT: #dbg_value(i32 [[X]], [[META11:![0-9]+]], !DIExpression(), [[META12:![0-9]+]]) 86; OPTIMIZATION_LEVEL_2-NEXT: #dbg_value(i32 [[Y]], [[META13:![0-9]+]], !DIExpression(), [[META12]]) 87; OPTIMIZATION_LEVEL_2-NEXT: #dbg_declare(ptr undef, [[META14:![0-9]+]], !DIExpression(), [[META15:![0-9]+]]) 88; OPTIMIZATION_LEVEL_2-NEXT: #dbg_declare(ptr undef, [[META16:![0-9]+]], !DIExpression(), [[META17:![0-9]+]]) 89; OPTIMIZATION_LEVEL_2-NEXT: [[X_Y:%.*]] = tail call i32 @llvm.smax.i32(i32 [[X]], i32 [[Y]]) 90; OPTIMIZATION_LEVEL_2-NEXT: #dbg_value(i32 [[X_Y]], [[META18:![0-9]+]], !DIExpression(), [[META12]]) 91; OPTIMIZATION_LEVEL_2-NEXT: ret i32 [[X_Y]], !dbg [[DBG19:![0-9]+]] 92; 93entry: 94 %x.addr = alloca i32, align 4 95 %y.addr = alloca i32, align 4 96 %i = alloca i32, align 4 97 %m = alloca i32, align 4 98 %j = alloca i32, align 4 99 store i32 %x, ptr %x.addr, align 4 100 call void @llvm.dbg.declare(metadata ptr %x.addr, metadata !11, metadata !12), !dbg !13 101 store i32 %y, ptr %y.addr, align 4 102 call void @llvm.dbg.declare(metadata ptr %y.addr, metadata !14, metadata !12), !dbg !15 103 call void @llvm.dbg.declare(metadata ptr %i, metadata !16, metadata !12), !dbg !17 104 call void @llvm.dbg.declare(metadata ptr %m, metadata !18, metadata !12), !dbg !19 105 call void @llvm.dbg.declare(metadata ptr %j, metadata !20, metadata !12), !dbg !21 106 %0 = load i32, ptr %x.addr, align 4, !dbg !22 107 %1 = load i32, ptr %y.addr, align 4, !dbg !24 108 %cmp = icmp sgt i32 %0, %1, !dbg !25 109 br i1 %cmp, label %if.then, label %if.else, !dbg !26 110 111if.then: ; preds = %entry 112 %2 = load i32, ptr %x.addr, align 4, !dbg !27 113 store i32 %2, ptr %m, align 4, !dbg !28 114 br label %if.end, !dbg !29 115 116if.else: ; preds = %entry 117 %3 = load i32, ptr %y.addr, align 4, !dbg !30 118 store i32 %3, ptr %m, align 4, !dbg !31 119 br label %if.end 120 121if.end: ; preds = %if.else, %if.then 122 %4 = load i32, ptr %m, align 4, !dbg !32 123 ret i32 %4, !dbg !33 124} 125 126; Function Attrs: nounwind readnone 127declare void @llvm.dbg.declare(metadata, metadata, metadata) 128 129; Function Attrs: nounwind uwtable 130define i32 @maxB(i32 %x, i32 %y) !dbg !34 { 131; OPTIMIZATION_LEVEL_0-LABEL: define i32 @maxB 132; OPTIMIZATION_LEVEL_0-SAME: (i32 [[X:%.*]], i32 [[Y:%.*]]) !dbg [[DBG33:![0-9]+]] { 133; OPTIMIZATION_LEVEL_0-NEXT: entry: 134; OPTIMIZATION_LEVEL_0-NEXT: [[X_ADDR:%.*]] = alloca i32, align 4 135; OPTIMIZATION_LEVEL_0-NEXT: [[Y_ADDR:%.*]] = alloca i32, align 4 136; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[X]], ptr [[X_ADDR]], align 4 137; OPTIMIZATION_LEVEL_0-NEXT: #dbg_declare(ptr [[X_ADDR]], [[META34:![0-9]+]], !DIExpression(), [[META35:![0-9]+]]) 138; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[Y]], ptr [[Y_ADDR]], align 4 139; OPTIMIZATION_LEVEL_0-NEXT: #dbg_declare(ptr [[Y_ADDR]], [[META36:![0-9]+]], !DIExpression(), [[META37:![0-9]+]]) 140; OPTIMIZATION_LEVEL_0-NEXT: [[TMP0:%.*]] = tail call i32 @maxA(i32 [[X]], i32 [[Y]]), !dbg [[DBG38:![0-9]+]] 141; OPTIMIZATION_LEVEL_0-NEXT: ret i32 [[TMP0]], !dbg [[DBG38]] 142; 143; OPTIMIZATION_LEVEL_2-LABEL: define i32 @maxB 144; OPTIMIZATION_LEVEL_2-SAME: (i32 [[X:%.*]], i32 [[Y:%.*]]) local_unnamed_addr #[[ATTR0]] !dbg [[DBG20:![0-9]+]] { 145; OPTIMIZATION_LEVEL_2-NEXT: entry: 146; OPTIMIZATION_LEVEL_2-NEXT: #dbg_value(i32 [[X]], [[META21:![0-9]+]], !DIExpression(), [[META22:![0-9]+]]) 147; OPTIMIZATION_LEVEL_2-NEXT: #dbg_value(i32 [[Y]], [[META23:![0-9]+]], !DIExpression(), [[META22]]) 148; OPTIMIZATION_LEVEL_2-NEXT: [[TMP0:%.*]] = tail call i32 @maxA(i32 [[X]], i32 [[Y]]) #[[ATTR0]], !dbg [[DBG24:![0-9]+]] 149; OPTIMIZATION_LEVEL_2-NEXT: ret i32 [[TMP0]], !dbg [[DBG24]] 150; 151 152 153entry: 154 %x.addr = alloca i32, align 4 155 %y.addr = alloca i32, align 4 156 %i = alloca i32, align 4 157 %m = alloca i32, align 4 158 %j = alloca i32, align 4 159 store i32 %x, ptr %x.addr, align 4 160 call void @llvm.dbg.declare(metadata ptr %x.addr, metadata !35, metadata !12), !dbg !36 161 store i32 %y, ptr %y.addr, align 4 162 call void @llvm.dbg.declare(metadata ptr %y.addr, metadata !37, metadata !12), !dbg !38 163 call void @llvm.dbg.declare(metadata ptr %i, metadata !39, metadata !12), !dbg !40 164 call void @llvm.dbg.declare(metadata ptr %m, metadata !41, metadata !12), !dbg !42 165 call void @llvm.dbg.declare(metadata ptr %j, metadata !43, metadata !12), !dbg !44 166 %0 = load i32, ptr %x.addr, align 4, !dbg !45 167 %1 = load i32, ptr %y.addr, align 4, !dbg !47 168 %cmp = icmp sgt i32 %0, %1, !dbg !48 169 br i1 %cmp, label %if.then, label %if.else, !dbg !49 170 171if.then: ; preds = %entry 172 %2 = load i32, ptr %x.addr, align 4, !dbg !50 173 store i32 %2, ptr %m, align 4, !dbg !51 174 br label %if.end, !dbg !52 175 176if.else: ; preds = %entry 177 %3 = load i32, ptr %y.addr, align 4, !dbg !53 178 store i32 %3, ptr %m, align 4, !dbg !54 179 br label %if.end 180 181if.end: ; preds = %if.else, %if.then 182 %4 = load i32, ptr %m, align 4, !dbg !55 183 ret i32 %4, !dbg !56 184} 185 186; Function Attrs: nounwind uwtable 187define void @f() !dbg !57 { 188; OPTIMIZATION_LEVEL_0-LABEL: define void @f 189; OPTIMIZATION_LEVEL_0-SAME: () !dbg [[DBG39:![0-9]+]] { 190; OPTIMIZATION_LEVEL_0-NEXT: entry: 191; OPTIMIZATION_LEVEL_0-NEXT: [[CALL:%.*]] = call i32 @maxA(i32 3, i32 4), !dbg [[DBG42:![0-9]+]] 192; OPTIMIZATION_LEVEL_0-NEXT: [[CALL1:%.*]] = call i32 @maxB(i32 1, i32 9), !dbg [[DBG43:![0-9]+]] 193; OPTIMIZATION_LEVEL_0-NEXT: ret void, !dbg [[DBG44:![0-9]+]] 194; 195; OPTIMIZATION_LEVEL_2-LABEL: define void @f 196; OPTIMIZATION_LEVEL_2-SAME: () local_unnamed_addr #[[ATTR0]] !dbg [[DBG25:![0-9]+]] { 197; OPTIMIZATION_LEVEL_2-NEXT: entry: 198; OPTIMIZATION_LEVEL_2-NEXT: ret void, !dbg [[DBG28:![0-9]+]] 199; 200entry: 201 %call = call i32 @maxA(i32 3, i32 4), !dbg !60 202 %call1 = call i32 @maxB(i32 1, i32 9), !dbg !61 203 ret void, !dbg !62 204} 205 206!llvm.dbg.cu = !{!0} 207!llvm.module.flags = !{!3, !4} 208!llvm.ident = !{!5} 209 210!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 211!1 = !DIFile(filename: "mergefunc-preserve-debug-info.c", directory: "") 212!2 = !{} 213!3 = !{i32 2, !"Dwarf Version", i32 4} 214!4 = !{i32 2, !"Debug Info Version", i32 3} 215!5 = !{!""} 216!6 = distinct !DISubprogram(name: "maxA", scope: !7, file: !7, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 217!7 = !DIFile(filename: "./mergefunc-preserve-debug-info.c", directory: "") 218!8 = !DISubroutineType(types: !9) 219!9 = !{!10, !10, !10} 220!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 221!11 = !DILocalVariable(name: "x", arg: 1, scope: !6, file: !7, line: 1, type: !10) 222!12 = !DIExpression() 223!13 = !DILocation(line: 1, column: 14, scope: !6) 224!14 = !DILocalVariable(name: "y", arg: 2, scope: !6, file: !7, line: 1, type: !10) 225!15 = !DILocation(line: 1, column: 21, scope: !6) 226!16 = !DILocalVariable(name: "i", scope: !6, file: !7, line: 2, type: !10) 227!17 = !DILocation(line: 2, column: 7, scope: !6) 228!18 = !DILocalVariable(name: "m", scope: !6, file: !7, line: 2, type: !10) 229!19 = !DILocation(line: 2, column: 10, scope: !6) 230!20 = !DILocalVariable(name: "j", scope: !6, file: !7, line: 2, type: !10) 231!21 = !DILocation(line: 2, column: 13, scope: !6) 232!22 = !DILocation(line: 3, column: 7, scope: !23) 233!23 = distinct !DILexicalBlock(scope: !6, file: !7, line: 3, column: 7) 234!24 = !DILocation(line: 3, column: 11, scope: !23) 235!25 = !DILocation(line: 3, column: 9, scope: !23) 236!26 = !DILocation(line: 3, column: 7, scope: !6) 237!27 = !DILocation(line: 4, column: 9, scope: !23) 238!28 = !DILocation(line: 4, column: 7, scope: !23) 239!29 = !DILocation(line: 4, column: 5, scope: !23) 240!30 = !DILocation(line: 6, column: 9, scope: !23) 241!31 = !DILocation(line: 6, column: 7, scope: !23) 242!32 = !DILocation(line: 7, column: 10, scope: !6) 243!33 = !DILocation(line: 7, column: 3, scope: !6) 244!34 = distinct !DISubprogram(name: "maxB", scope: !7, file: !7, line: 10, type: !8, isLocal: false, isDefinition: true, scopeLine: 10, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 245!35 = !DILocalVariable(name: "x", arg: 1, scope: !34, file: !7, line: 10, type: !10) 246!36 = !DILocation(line: 10, column: 14, scope: !34) 247!37 = !DILocalVariable(name: "y", arg: 2, scope: !34, file: !7, line: 10, type: !10) 248!38 = !DILocation(line: 10, column: 21, scope: !34) 249!39 = !DILocalVariable(name: "i", scope: !34, file: !7, line: 11, type: !10) 250!40 = !DILocation(line: 11, column: 7, scope: !34) 251!41 = !DILocalVariable(name: "m", scope: !34, file: !7, line: 11, type: !10) 252!42 = !DILocation(line: 11, column: 10, scope: !34) 253!43 = !DILocalVariable(name: "j", scope: !34, file: !7, line: 11, type: !10) 254!44 = !DILocation(line: 11, column: 13, scope: !34) 255!45 = !DILocation(line: 12, column: 7, scope: !46) 256!46 = distinct !DILexicalBlock(scope: !34, file: !7, line: 12, column: 7) 257!47 = !DILocation(line: 12, column: 11, scope: !46) 258!48 = !DILocation(line: 12, column: 9, scope: !46) 259!49 = !DILocation(line: 12, column: 7, scope: !34) 260!50 = !DILocation(line: 13, column: 9, scope: !46) 261!51 = !DILocation(line: 13, column: 7, scope: !46) 262!52 = !DILocation(line: 13, column: 5, scope: !46) 263!53 = !DILocation(line: 15, column: 9, scope: !46) 264!54 = !DILocation(line: 15, column: 7, scope: !46) 265!55 = !DILocation(line: 16, column: 10, scope: !34) 266!56 = !DILocation(line: 16, column: 3, scope: !34) 267!57 = distinct !DISubprogram(name: "f", scope: !7, file: !7, line: 19, type: !58, isLocal: false, isDefinition: true, scopeLine: 19, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 268!58 = !DISubroutineType(types: !59) 269!59 = !{null} 270!60 = !DILocation(line: 21, column: 3, scope: !57) 271!61 = !DILocation(line: 22, column: 3, scope: !57) 272!62 = !DILocation(line: 23, column: 1, scope: !57) 273