224 lines
10 KiB
LLVM
224 lines
10 KiB
LLVM
; RUN: opt -O0 -S -mergefunc -mergefunc-preserve-debug-info < %s | FileCheck %s --check-prefix=OPTIMIZATION_LEVEL_0
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; RUN: opt -O2 -S -mergefunc -mergefunc-preserve-debug-info < %s | FileCheck %s --check-prefix=OPTIMIZATION_LEVEL_2
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; Preserve debug info in thunks under -mergefunc -mergefunc-preserve-debug-info
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;
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; We test that:
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; At -O0 we have preserved the generated @llvm.dbg.declare debug intrinsics.
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; At -O2 we have preserved the generated @llvm.dbg.value debug intrinsics.
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; At -O0, stores from the incoming parameters to locations on the stack-frame
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; and allocas that create these locations on the stack-frame are preserved.
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; Debug info got generated for the call made by the thunk and for its return value.
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; The foregoing is the only content of a thunk's entry block.
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; A thunk makes a tail call to the shared implementation.
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; A thunk's call site is preserved to point to the thunk (with only -mergefunc the
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; call site is modified to point to the shared implementation) when both occur
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; within the same translation unit.
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; The source code that was used to test and generate this LLVM IR is:
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;
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; int maxA(int x, int y) {
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; int i, m, j;
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; if (x > y)
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; m = x;
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; else
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; m = y;
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; return m;
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; }
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;
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; int maxB(int x, int y) {
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; int i, m, j;
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; if (x > y)
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; m = x;
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; else
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; m = y;
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; return m;
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; }
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;
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; void f(void) {
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;
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; maxA(3, 4);
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; maxB(1, 9);
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; }
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; Function Attrs: nounwind uwtable
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define i32 @maxA(i32 %x, i32 %y) !dbg !6 {
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entry:
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%x.addr = alloca i32, align 4
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%y.addr = alloca i32, align 4
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%i = alloca i32, align 4
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%m = alloca i32, align 4
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%j = alloca i32, align 4
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store i32 %x, i32* %x.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %x.addr, metadata !11, metadata !12), !dbg !13
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store i32 %y, i32* %y.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %y.addr, metadata !14, metadata !12), !dbg !15
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call void @llvm.dbg.declare(metadata i32* %i, metadata !16, metadata !12), !dbg !17
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call void @llvm.dbg.declare(metadata i32* %m, metadata !18, metadata !12), !dbg !19
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call void @llvm.dbg.declare(metadata i32* %j, metadata !20, metadata !12), !dbg !21
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%0 = load i32, i32* %x.addr, align 4, !dbg !22
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%1 = load i32, i32* %y.addr, align 4, !dbg !24
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%cmp = icmp sgt i32 %0, %1, !dbg !25
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br i1 %cmp, label %if.then, label %if.else, !dbg !26
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if.then: ; preds = %entry
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%2 = load i32, i32* %x.addr, align 4, !dbg !27
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store i32 %2, i32* %m, align 4, !dbg !28
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br label %if.end, !dbg !29
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if.else: ; preds = %entry
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%3 = load i32, i32* %y.addr, align 4, !dbg !30
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store i32 %3, i32* %m, align 4, !dbg !31
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%4 = load i32, i32* %m, align 4, !dbg !32
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ret i32 %4, !dbg !33
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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; Function Attrs: nounwind uwtable
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define i32 @maxB(i32 %x, i32 %y) !dbg !34 {
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; OPTIMIZATION_LEVEL_0: define i32 @maxB(i32 %x, i32 %y)
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; OPTIMIZATION_LEVEL_0-NEXT: entry:
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; OPTIMIZATION_LEVEL_0-NEXT: %x.addr = alloca i32, align 4
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; OPTIMIZATION_LEVEL_0-NEXT: %y.addr = alloca i32, align 4
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; OPTIMIZATION_LEVEL_0-NEXT: store i32 %x, i32* %x.addr, align 4
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; OPTIMIZATION_LEVEL_0-NEXT: call void @llvm.dbg.declare(metadata i32* %x.addr, metadata !{{[0-9]+}}, metadata !DIExpression()), !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_0-NEXT: store i32 %y, i32* %y.addr, align 4
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; OPTIMIZATION_LEVEL_0-NEXT: call void @llvm.dbg.declare(metadata i32* %y.addr, metadata !{{[0-9]+}}, metadata !DIExpression()), !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_0-NEXT: %0 = tail call i32 @maxA(i32 %x, i32 %y), !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_0-NEXT: ret i32 %0, !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_0-NEXT: }
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; OPTIMIZATION_LEVEL_2: define i32 @maxB(i32 %x, i32 %y)
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; OPTIMIZATION_LEVEL_2-NEXT: entry:
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; OPTIMIZATION_LEVEL_2-NEXT: call void @llvm.dbg.value(metadata i32 %x, metadata !{{[0-9]+}}, metadata !DIExpression()), !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_2-NEXT: call void @llvm.dbg.value(metadata i32 %y, metadata !{{[0-9]+}}, metadata !DIExpression()), !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_2-NEXT: %0 = tail call i32 @maxA(i32 %x, i32 %y) #{{[0-9]+}}, !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_2-NEXT: ret i32 %0, !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_2-NEXT: }
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entry:
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%x.addr = alloca i32, align 4
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%y.addr = alloca i32, align 4
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%i = alloca i32, align 4
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%m = alloca i32, align 4
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%j = alloca i32, align 4
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store i32 %x, i32* %x.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %x.addr, metadata !35, metadata !12), !dbg !36
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store i32 %y, i32* %y.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %y.addr, metadata !37, metadata !12), !dbg !38
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call void @llvm.dbg.declare(metadata i32* %i, metadata !39, metadata !12), !dbg !40
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call void @llvm.dbg.declare(metadata i32* %m, metadata !41, metadata !12), !dbg !42
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call void @llvm.dbg.declare(metadata i32* %j, metadata !43, metadata !12), !dbg !44
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%0 = load i32, i32* %x.addr, align 4, !dbg !45
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%1 = load i32, i32* %y.addr, align 4, !dbg !47
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%cmp = icmp sgt i32 %0, %1, !dbg !48
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br i1 %cmp, label %if.then, label %if.else, !dbg !49
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if.then: ; preds = %entry
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%2 = load i32, i32* %x.addr, align 4, !dbg !50
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store i32 %2, i32* %m, align 4, !dbg !51
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br label %if.end, !dbg !52
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if.else: ; preds = %entry
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%3 = load i32, i32* %y.addr, align 4, !dbg !53
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store i32 %3, i32* %m, align 4, !dbg !54
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%4 = load i32, i32* %m, align 4, !dbg !55
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ret i32 %4, !dbg !56
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}
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; Function Attrs: nounwind uwtable
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define void @f() !dbg !57 {
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entry:
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; OPTIMIZATION_LEVEL_0: define void @f()
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; OPTIMIZATION_LEVEL_0-NEXT: entry:
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; OPTIMIZATION_LEVEL_0-NEXT: %call = call i32 @maxA(i32 3, i32 4), !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_0-NEXT: %call1 = call i32 @maxB(i32 1, i32 9), !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_0-NEXT: ret void, !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_2: define void @f()
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; OPTIMIZATION_LEVEL_2-NEXT: entry:
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; OPTIMIZATION_LEVEL_2-NEXT: ret void, !dbg !{{[0-9]+}}
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%call = call i32 @maxA(i32 3, i32 4), !dbg !60
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%call1 = call i32 @maxB(i32 1, i32 9), !dbg !61
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ret void, !dbg !62
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "mergefunc-preserve-debug-info.c", directory: "")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{!""}
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!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)
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!7 = !DIFile(filename: "./mergefunc-preserve-debug-info.c", directory: "")
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !DILocalVariable(name: "x", arg: 1, scope: !6, file: !7, line: 1, type: !10)
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!12 = !DIExpression()
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!13 = !DILocation(line: 1, column: 14, scope: !6)
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!14 = !DILocalVariable(name: "y", arg: 2, scope: !6, file: !7, line: 1, type: !10)
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!15 = !DILocation(line: 1, column: 21, scope: !6)
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!16 = !DILocalVariable(name: "i", scope: !6, file: !7, line: 2, type: !10)
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!17 = !DILocation(line: 2, column: 7, scope: !6)
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!18 = !DILocalVariable(name: "m", scope: !6, file: !7, line: 2, type: !10)
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!19 = !DILocation(line: 2, column: 10, scope: !6)
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!20 = !DILocalVariable(name: "j", scope: !6, file: !7, line: 2, type: !10)
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!21 = !DILocation(line: 2, column: 13, scope: !6)
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!22 = !DILocation(line: 3, column: 7, scope: !23)
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!23 = distinct !DILexicalBlock(scope: !6, file: !7, line: 3, column: 7)
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!24 = !DILocation(line: 3, column: 11, scope: !23)
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!25 = !DILocation(line: 3, column: 9, scope: !23)
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!26 = !DILocation(line: 3, column: 7, scope: !6)
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!27 = !DILocation(line: 4, column: 9, scope: !23)
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!28 = !DILocation(line: 4, column: 7, scope: !23)
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!29 = !DILocation(line: 4, column: 5, scope: !23)
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!30 = !DILocation(line: 6, column: 9, scope: !23)
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!31 = !DILocation(line: 6, column: 7, scope: !23)
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!32 = !DILocation(line: 7, column: 10, scope: !6)
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!33 = !DILocation(line: 7, column: 3, scope: !6)
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!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)
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!35 = !DILocalVariable(name: "x", arg: 1, scope: !34, file: !7, line: 10, type: !10)
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!36 = !DILocation(line: 10, column: 14, scope: !34)
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!37 = !DILocalVariable(name: "y", arg: 2, scope: !34, file: !7, line: 10, type: !10)
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!38 = !DILocation(line: 10, column: 21, scope: !34)
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!39 = !DILocalVariable(name: "i", scope: !34, file: !7, line: 11, type: !10)
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!40 = !DILocation(line: 11, column: 7, scope: !34)
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!41 = !DILocalVariable(name: "m", scope: !34, file: !7, line: 11, type: !10)
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!42 = !DILocation(line: 11, column: 10, scope: !34)
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!43 = !DILocalVariable(name: "j", scope: !34, file: !7, line: 11, type: !10)
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!44 = !DILocation(line: 11, column: 13, scope: !34)
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!45 = !DILocation(line: 12, column: 7, scope: !46)
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!46 = distinct !DILexicalBlock(scope: !34, file: !7, line: 12, column: 7)
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!47 = !DILocation(line: 12, column: 11, scope: !46)
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!48 = !DILocation(line: 12, column: 9, scope: !46)
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!49 = !DILocation(line: 12, column: 7, scope: !34)
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!50 = !DILocation(line: 13, column: 9, scope: !46)
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!51 = !DILocation(line: 13, column: 7, scope: !46)
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!52 = !DILocation(line: 13, column: 5, scope: !46)
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!53 = !DILocation(line: 15, column: 9, scope: !46)
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!54 = !DILocation(line: 15, column: 7, scope: !46)
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!55 = !DILocation(line: 16, column: 10, scope: !34)
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!56 = !DILocation(line: 16, column: 3, scope: !34)
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!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)
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!58 = !DISubroutineType(types: !59)
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!59 = !{null}
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!60 = !DILocation(line: 21, column: 3, scope: !57)
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!61 = !DILocation(line: 22, column: 3, scope: !57)
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!62 = !DILocation(line: 23, column: 1, scope: !57)
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