; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2 ; RUN: opt -passes='default,mergefunc' -S -mergefunc-preserve-debug-info < %s | FileCheck %s --check-prefix=OPTIMIZATION_LEVEL_0 ; RUN: opt -passes='default,mergefunc' -S -mergefunc-preserve-debug-info < %s | FileCheck %s --check-prefix=OPTIMIZATION_LEVEL_2 ; Preserve debug info in thunks under -passes=mergefunc -mergefunc-preserve-debug-info ; ; We test that: ; At -O0 we have preserved the generated @llvm.dbg.declare debug intrinsics. ; At -O2 we have preserved the generated @llvm.dbg.value debug intrinsics. ; At -O0, stores from the incoming parameters to locations on the stack-frame ; and allocas that create these locations on the stack-frame are preserved. ; Debug info got generated for the call made by the thunk and for its return value. ; The foregoing is the only content of a thunk's entry block. ; A thunk makes a tail call to the shared implementation. ; A thunk's call site is preserved to point to the thunk (with only -passes=mergefunc the ; call site is modified to point to the shared implementation) when both occur ; within the same translation unit. ; The source code that was used to test and generate this LLVM IR is: ; ; int maxA(int x, int y) { ; int i, m, j; ; if (x > y) ; m = x; ; else ; m = y; ; return m; ; } ; ; int maxB(int x, int y) { ; int i, m, j; ; if (x > y) ; m = x; ; else ; m = y; ; return m; ; } ; ; void f(void) { ; ; maxA(3, 4); ; maxB(1, 9); ; } ; Function Attrs: nounwind uwtable define i32 @maxA(i32 %x, i32 %y) !dbg !6 { ; OPTIMIZATION_LEVEL_0-LABEL: define i32 @maxA ; OPTIMIZATION_LEVEL_0-SAME: (i32 [[X:%.*]], i32 [[Y:%.*]]) !dbg [[DBG6:![0-9]+]] { ; OPTIMIZATION_LEVEL_0-NEXT: entry: ; OPTIMIZATION_LEVEL_0-NEXT: [[X_ADDR:%.*]] = alloca i32, align 4 ; OPTIMIZATION_LEVEL_0-NEXT: [[Y_ADDR:%.*]] = alloca i32, align 4 ; OPTIMIZATION_LEVEL_0-NEXT: [[I:%.*]] = alloca i32, align 4 ; OPTIMIZATION_LEVEL_0-NEXT: [[M:%.*]] = alloca i32, align 4 ; OPTIMIZATION_LEVEL_0-NEXT: [[J:%.*]] = alloca i32, align 4 ; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[X]], ptr [[X_ADDR]], align 4 ; OPTIMIZATION_LEVEL_0-NEXT: call void @llvm.dbg.declare(metadata ptr [[X_ADDR]], metadata [[META11:![0-9]+]], metadata !DIExpression()), !dbg [[DBG12:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[Y]], ptr [[Y_ADDR]], align 4 ; OPTIMIZATION_LEVEL_0-NEXT: call void @llvm.dbg.declare(metadata ptr [[Y_ADDR]], metadata [[META13:![0-9]+]], metadata !DIExpression()), !dbg [[DBG14:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: call void @llvm.dbg.declare(metadata ptr [[I]], metadata [[META15:![0-9]+]], metadata !DIExpression()), !dbg [[DBG16:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: call void @llvm.dbg.declare(metadata ptr [[M]], metadata [[META17:![0-9]+]], metadata !DIExpression()), !dbg [[DBG18:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: call void @llvm.dbg.declare(metadata ptr [[J]], metadata [[META19:![0-9]+]], metadata !DIExpression()), !dbg [[DBG20:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: [[TMP0:%.*]] = load i32, ptr [[X_ADDR]], align 4, !dbg [[DBG21:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: [[TMP1:%.*]] = load i32, ptr [[Y_ADDR]], align 4, !dbg [[DBG23:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: [[CMP:%.*]] = icmp sgt i32 [[TMP0]], [[TMP1]], !dbg [[DBG24:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]], !dbg [[DBG25:![0-9]+]] ; OPTIMIZATION_LEVEL_0: if.then: ; OPTIMIZATION_LEVEL_0-NEXT: [[TMP2:%.*]] = load i32, ptr [[X_ADDR]], align 4, !dbg [[DBG26:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[TMP2]], ptr [[M]], align 4, !dbg [[DBG27:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: br label [[IF_END:%.*]], !dbg [[DBG28:![0-9]+]] ; OPTIMIZATION_LEVEL_0: if.else: ; OPTIMIZATION_LEVEL_0-NEXT: [[TMP3:%.*]] = load i32, ptr [[Y_ADDR]], align 4, !dbg [[DBG29:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[TMP3]], ptr [[M]], align 4, !dbg [[DBG30:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: br label [[IF_END]] ; OPTIMIZATION_LEVEL_0: if.end: ; OPTIMIZATION_LEVEL_0-NEXT: [[TMP4:%.*]] = load i32, ptr [[M]], align 4, !dbg [[DBG31:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: ret i32 [[TMP4]], !dbg [[DBG32:![0-9]+]] ; ; OPTIMIZATION_LEVEL_2-LABEL: define i32 @maxA ; OPTIMIZATION_LEVEL_2-SAME: (i32 [[X:%.*]], i32 [[Y:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] !dbg [[DBG6:![0-9]+]] { ; OPTIMIZATION_LEVEL_2-NEXT: entry: ; OPTIMIZATION_LEVEL_2-NEXT: call void @llvm.dbg.value(metadata i32 [[X]], metadata [[META11:![0-9]+]], metadata !DIExpression()), !dbg [[DBG12:![0-9]+]] ; OPTIMIZATION_LEVEL_2-NEXT: call void @llvm.dbg.value(metadata i32 [[Y]], metadata [[META13:![0-9]+]], metadata !DIExpression()), !dbg [[DBG12]] ; OPTIMIZATION_LEVEL_2-NEXT: call void @llvm.dbg.declare(metadata ptr undef, metadata [[META14:![0-9]+]], metadata !DIExpression()), !dbg [[DBG15:![0-9]+]] ; OPTIMIZATION_LEVEL_2-NEXT: call void @llvm.dbg.declare(metadata ptr undef, metadata [[META16:![0-9]+]], metadata !DIExpression()), !dbg [[DBG17:![0-9]+]] ; OPTIMIZATION_LEVEL_2-NEXT: [[X_Y:%.*]] = tail call i32 @llvm.smax.i32(i32 [[X]], i32 [[Y]]) ; OPTIMIZATION_LEVEL_2-NEXT: call void @llvm.dbg.value(metadata i32 [[X_Y]], metadata [[META18:![0-9]+]], metadata !DIExpression()), !dbg [[DBG12]] ; OPTIMIZATION_LEVEL_2-NEXT: ret i32 [[X_Y]], !dbg [[DBG19:![0-9]+]] ; entry: %x.addr = alloca i32, align 4 %y.addr = alloca i32, align 4 %i = alloca i32, align 4 %m = alloca i32, align 4 %j = alloca i32, align 4 store i32 %x, ptr %x.addr, align 4 call void @llvm.dbg.declare(metadata ptr %x.addr, metadata !11, metadata !12), !dbg !13 store i32 %y, ptr %y.addr, align 4 call void @llvm.dbg.declare(metadata ptr %y.addr, metadata !14, metadata !12), !dbg !15 call void @llvm.dbg.declare(metadata ptr %i, metadata !16, metadata !12), !dbg !17 call void @llvm.dbg.declare(metadata ptr %m, metadata !18, metadata !12), !dbg !19 call void @llvm.dbg.declare(metadata ptr %j, metadata !20, metadata !12), !dbg !21 %0 = load i32, ptr %x.addr, align 4, !dbg !22 %1 = load i32, ptr %y.addr, align 4, !dbg !24 %cmp = icmp sgt i32 %0, %1, !dbg !25 br i1 %cmp, label %if.then, label %if.else, !dbg !26 if.then: ; preds = %entry %2 = load i32, ptr %x.addr, align 4, !dbg !27 store i32 %2, ptr %m, align 4, !dbg !28 br label %if.end, !dbg !29 if.else: ; preds = %entry %3 = load i32, ptr %y.addr, align 4, !dbg !30 store i32 %3, ptr %m, align 4, !dbg !31 br label %if.end if.end: ; preds = %if.else, %if.then %4 = load i32, ptr %m, align 4, !dbg !32 ret i32 %4, !dbg !33 } ; Function Attrs: nounwind readnone declare void @llvm.dbg.declare(metadata, metadata, metadata) ; Function Attrs: nounwind uwtable define i32 @maxB(i32 %x, i32 %y) !dbg !34 { ; OPTIMIZATION_LEVEL_0-LABEL: define i32 @maxB ; OPTIMIZATION_LEVEL_0-SAME: (i32 [[X:%.*]], i32 [[Y:%.*]]) !dbg [[DBG33:![0-9]+]] { ; OPTIMIZATION_LEVEL_0-NEXT: entry: ; OPTIMIZATION_LEVEL_0-NEXT: [[X_ADDR:%.*]] = alloca i32, align 4 ; OPTIMIZATION_LEVEL_0-NEXT: [[Y_ADDR:%.*]] = alloca i32, align 4 ; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[X]], ptr [[X_ADDR]], align 4 ; OPTIMIZATION_LEVEL_0-NEXT: call void @llvm.dbg.declare(metadata ptr [[X_ADDR]], metadata [[META34:![0-9]+]], metadata !DIExpression()), !dbg [[DBG35:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: store i32 [[Y]], ptr [[Y_ADDR]], align 4 ; OPTIMIZATION_LEVEL_0-NEXT: call void @llvm.dbg.declare(metadata ptr [[Y_ADDR]], metadata [[META36:![0-9]+]], metadata !DIExpression()), !dbg [[DBG37:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: [[TMP0:%.*]] = tail call i32 @maxA(i32 [[X]], i32 [[Y]]), !dbg [[DBG38:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: ret i32 [[TMP0]], !dbg [[DBG38]] ; ; OPTIMIZATION_LEVEL_2-LABEL: define i32 @maxB ; OPTIMIZATION_LEVEL_2-SAME: (i32 [[X:%.*]], i32 [[Y:%.*]]) local_unnamed_addr #[[ATTR0]] !dbg [[DBG20:![0-9]+]] { ; OPTIMIZATION_LEVEL_2-NEXT: entry: ; OPTIMIZATION_LEVEL_2-NEXT: call void @llvm.dbg.value(metadata i32 [[X]], metadata [[META21:![0-9]+]], metadata !DIExpression()), !dbg [[DBG22:![0-9]+]] ; OPTIMIZATION_LEVEL_2-NEXT: call void @llvm.dbg.value(metadata i32 [[Y]], metadata [[META23:![0-9]+]], metadata !DIExpression()), !dbg [[DBG22]] ; OPTIMIZATION_LEVEL_2-NEXT: [[TMP0:%.*]] = tail call i32 @maxA(i32 [[X]], i32 [[Y]]) #[[ATTR0]], !dbg [[DBG24:![0-9]+]] ; OPTIMIZATION_LEVEL_2-NEXT: ret i32 [[TMP0]], !dbg [[DBG24]] ; entry: %x.addr = alloca i32, align 4 %y.addr = alloca i32, align 4 %i = alloca i32, align 4 %m = alloca i32, align 4 %j = alloca i32, align 4 store i32 %x, ptr %x.addr, align 4 call void @llvm.dbg.declare(metadata ptr %x.addr, metadata !35, metadata !12), !dbg !36 store i32 %y, ptr %y.addr, align 4 call void @llvm.dbg.declare(metadata ptr %y.addr, metadata !37, metadata !12), !dbg !38 call void @llvm.dbg.declare(metadata ptr %i, metadata !39, metadata !12), !dbg !40 call void @llvm.dbg.declare(metadata ptr %m, metadata !41, metadata !12), !dbg !42 call void @llvm.dbg.declare(metadata ptr %j, metadata !43, metadata !12), !dbg !44 %0 = load i32, ptr %x.addr, align 4, !dbg !45 %1 = load i32, ptr %y.addr, align 4, !dbg !47 %cmp = icmp sgt i32 %0, %1, !dbg !48 br i1 %cmp, label %if.then, label %if.else, !dbg !49 if.then: ; preds = %entry %2 = load i32, ptr %x.addr, align 4, !dbg !50 store i32 %2, ptr %m, align 4, !dbg !51 br label %if.end, !dbg !52 if.else: ; preds = %entry %3 = load i32, ptr %y.addr, align 4, !dbg !53 store i32 %3, ptr %m, align 4, !dbg !54 br label %if.end if.end: ; preds = %if.else, %if.then %4 = load i32, ptr %m, align 4, !dbg !55 ret i32 %4, !dbg !56 } ; Function Attrs: nounwind uwtable define void @f() !dbg !57 { ; OPTIMIZATION_LEVEL_0-LABEL: define void @f ; OPTIMIZATION_LEVEL_0-SAME: () !dbg [[DBG39:![0-9]+]] { ; OPTIMIZATION_LEVEL_0-NEXT: entry: ; OPTIMIZATION_LEVEL_0-NEXT: [[CALL:%.*]] = call i32 @maxA(i32 3, i32 4), !dbg [[DBG42:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: [[CALL1:%.*]] = call i32 @maxB(i32 1, i32 9), !dbg [[DBG43:![0-9]+]] ; OPTIMIZATION_LEVEL_0-NEXT: ret void, !dbg [[DBG44:![0-9]+]] ; ; OPTIMIZATION_LEVEL_2-LABEL: define void @f ; OPTIMIZATION_LEVEL_2-SAME: () local_unnamed_addr #[[ATTR2:[0-9]+]] !dbg [[DBG25:![0-9]+]] { ; OPTIMIZATION_LEVEL_2-NEXT: entry: ; OPTIMIZATION_LEVEL_2-NEXT: ret void, !dbg [[DBG28:![0-9]+]] ; entry: %call = call i32 @maxA(i32 3, i32 4), !dbg !60 %call1 = call i32 @maxB(i32 1, i32 9), !dbg !61 ret void, !dbg !62 } !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!3, !4} !llvm.ident = !{!5} !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) !1 = !DIFile(filename: "mergefunc-preserve-debug-info.c", directory: "") !2 = !{} !3 = !{i32 2, !"Dwarf Version", i32 4} !4 = !{i32 2, !"Debug Info Version", i32 3} !5 = !{!""} !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) !7 = !DIFile(filename: "./mergefunc-preserve-debug-info.c", directory: "") !8 = !DISubroutineType(types: !9) !9 = !{!10, !10, !10} !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) !11 = !DILocalVariable(name: "x", arg: 1, scope: !6, file: !7, line: 1, type: !10) !12 = !DIExpression() !13 = !DILocation(line: 1, column: 14, scope: !6) !14 = !DILocalVariable(name: "y", arg: 2, scope: !6, file: !7, line: 1, type: !10) !15 = !DILocation(line: 1, column: 21, scope: !6) !16 = !DILocalVariable(name: "i", scope: !6, file: !7, line: 2, type: !10) !17 = !DILocation(line: 2, column: 7, scope: !6) !18 = !DILocalVariable(name: "m", scope: !6, file: !7, line: 2, type: !10) !19 = !DILocation(line: 2, column: 10, scope: !6) !20 = !DILocalVariable(name: "j", scope: !6, file: !7, line: 2, type: !10) !21 = !DILocation(line: 2, column: 13, scope: !6) !22 = !DILocation(line: 3, column: 7, scope: !23) !23 = distinct !DILexicalBlock(scope: !6, file: !7, line: 3, column: 7) !24 = !DILocation(line: 3, column: 11, scope: !23) !25 = !DILocation(line: 3, column: 9, scope: !23) !26 = !DILocation(line: 3, column: 7, scope: !6) !27 = !DILocation(line: 4, column: 9, scope: !23) !28 = !DILocation(line: 4, column: 7, scope: !23) !29 = !DILocation(line: 4, column: 5, scope: !23) !30 = !DILocation(line: 6, column: 9, scope: !23) !31 = !DILocation(line: 6, column: 7, scope: !23) !32 = !DILocation(line: 7, column: 10, scope: !6) !33 = !DILocation(line: 7, column: 3, scope: !6) !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) !35 = !DILocalVariable(name: "x", arg: 1, scope: !34, file: !7, line: 10, type: !10) !36 = !DILocation(line: 10, column: 14, scope: !34) !37 = !DILocalVariable(name: "y", arg: 2, scope: !34, file: !7, line: 10, type: !10) !38 = !DILocation(line: 10, column: 21, scope: !34) !39 = !DILocalVariable(name: "i", scope: !34, file: !7, line: 11, type: !10) !40 = !DILocation(line: 11, column: 7, scope: !34) !41 = !DILocalVariable(name: "m", scope: !34, file: !7, line: 11, type: !10) !42 = !DILocation(line: 11, column: 10, scope: !34) !43 = !DILocalVariable(name: "j", scope: !34, file: !7, line: 11, type: !10) !44 = !DILocation(line: 11, column: 13, scope: !34) !45 = !DILocation(line: 12, column: 7, scope: !46) !46 = distinct !DILexicalBlock(scope: !34, file: !7, line: 12, column: 7) !47 = !DILocation(line: 12, column: 11, scope: !46) !48 = !DILocation(line: 12, column: 9, scope: !46) !49 = !DILocation(line: 12, column: 7, scope: !34) !50 = !DILocation(line: 13, column: 9, scope: !46) !51 = !DILocation(line: 13, column: 7, scope: !46) !52 = !DILocation(line: 13, column: 5, scope: !46) !53 = !DILocation(line: 15, column: 9, scope: !46) !54 = !DILocation(line: 15, column: 7, scope: !46) !55 = !DILocation(line: 16, column: 10, scope: !34) !56 = !DILocation(line: 16, column: 3, scope: !34) !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) !58 = !DISubroutineType(types: !59) !59 = !{null} !60 = !DILocation(line: 21, column: 3, scope: !57) !61 = !DILocation(line: 22, column: 3, scope: !57) !62 = !DILocation(line: 23, column: 1, scope: !57)