6d353348e5
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
100 lines
4.0 KiB
LLVM
100 lines
4.0 KiB
LLVM
; RUN: opt < %s -S -inline | FileCheck %s
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; RUN: opt < %s -S -passes='cgscc(inline)' | FileCheck %s
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;
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; The purpose of this test is to check that inline pass preserves debug info
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; for variable using the dbg.declare intrinsic.
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;
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;; This test was generated by running this command:
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;; clang.exe -S -O0 -emit-llvm -g foo.c
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;;
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;; foo.c
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;; ==========================
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;; float foo(float x)
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;; {
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;; return x;
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;; }
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;;
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;; void bar(float *dst)
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;; {
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;; dst[0] = foo(dst[0]);
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;; }
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;; ==========================
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target datalayout = "e-m:w-p:32:32-i64:64-f80:32-n8:16:32-S32"
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target triple = "i686-pc-windows-msvc"
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; Function Attrs: nounwind
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define float @foo(float %x) #0 !dbg !4 {
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entry:
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%x.addr = alloca float, align 4
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store float %x, float* %x.addr, align 4
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call void @llvm.dbg.declare(metadata float* %x.addr, metadata !16, metadata !17), !dbg !18
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%0 = load float, float* %x.addr, align 4, !dbg !19
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ret float %0, !dbg !19
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; CHECK: define void @bar
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; Function Attrs: nounwind
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define void @bar(float* %dst) #0 !dbg !9 {
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entry:
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; CHECK: [[x_addr_i:%[a-zA-Z0-9.]+]] = alloca float, align 4
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; CHECK-NEXT: void @llvm.dbg.declare(metadata float* [[x_addr_i]], metadata [[m23:![0-9]+]], metadata !DIExpression()), !dbg [[m24:![0-9]+]]
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%dst.addr = alloca float*, align 4
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store float* %dst, float** %dst.addr, align 4
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call void @llvm.dbg.declare(metadata float** %dst.addr, metadata !20, metadata !17), !dbg !21
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%0 = load float*, float** %dst.addr, align 4, !dbg !22
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%arrayidx = getelementptr inbounds float, float* %0, i32 0, !dbg !22
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%1 = load float, float* %arrayidx, align 4, !dbg !22
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%call = call float @foo(float %1), !dbg !22
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; CHECK-NOT: call float @foo
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%2 = load float*, float** %dst.addr, align 4, !dbg !22
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%arrayidx1 = getelementptr inbounds float, float* %2, i32 0, !dbg !22
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store float %call, float* %arrayidx1, align 4, !dbg !22
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ret void, !dbg !23
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}
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!13, !14}
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!llvm.ident = !{!15}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.6.0 (trunk)", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
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!1 = !DIFile(filename: "foo.c", directory: "")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 2, file: !1, scope: !5, type: !6, variables: !2)
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!5 = !DIFile(filename: "foo.c", directory: "")
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!6 = !DISubroutineType(types: !7)
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!7 = !{!8, !8}
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!8 = !DIBasicType(tag: DW_TAG_base_type, name: "float", size: 32, align: 32, encoding: DW_ATE_float)
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!9 = distinct !DISubprogram(name: "bar", line: 6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 7, file: !1, scope: !5, type: !10, variables: !2)
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!10 = !DISubroutineType(types: !11)
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!11 = !{null, !12}
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!12 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: !8)
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!13 = !{i32 2, !"Dwarf Version", i32 4}
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!14 = !{i32 2, !"Debug Info Version", i32 3}
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!15 = !{!"clang version 3.6.0 (trunk)"}
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!16 = !DILocalVariable(name: "x", line: 1, arg: 1, scope: !4, file: !5, type: !8)
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!17 = !DIExpression()
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!18 = !DILocation(line: 1, column: 17, scope: !4)
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!19 = !DILocation(line: 3, column: 5, scope: !4)
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!20 = !DILocalVariable(name: "dst", line: 6, arg: 1, scope: !9, file: !5, type: !12)
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!21 = !DILocation(line: 6, column: 17, scope: !9)
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!22 = !DILocation(line: 8, column: 14, scope: !9)
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!23 = !DILocation(line: 9, column: 1, scope: !9)
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; CHECK: [[FOO:![0-9]+]] = distinct !DISubprogram(name: "foo",
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; CHECK: [[m23]] = !DILocalVariable(name: "x", arg: 1, scope: [[FOO]]
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; CHECK: [[BAR:![0-9]+]] = distinct !DISubprogram(name: "bar",
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; CHECK: [[m24]] = !DILocation(line: 1, column: 17, scope: [[FOO]], inlinedAt: [[CALL_SITE:![0-9]+]])
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; CHECK: [[CALL_SITE]] = distinct !DILocation(line: 8, column: 14, scope: [[BAR]])
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