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67886a34d2
Summary: Most DIExpressions are empty or very simple. When they are complex, they tend to be unique, so checking them inline is reasonable. This also avoids the need for CodeGen passes to append to the llvm.dbg.mir named md node. See also PR22780, for making DIExpression not be an MDNode. Reviewers: aprantl, dexonsmith, dblaikie Subscribers: qcolombet, javed.absar, eraman, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D37075 llvm-svn: 311594
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: tail call void @llvm.dbg.value(metadata i32 %x, metadata !{{[0-9]+}}, metadata !DIExpression()), !dbg !{{[0-9]+}}
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; OPTIMIZATION_LEVEL_2-NEXT: tail 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, variables: !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, variables: !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, variables: !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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