forked from OSchip/llvm-project
68 lines
2.8 KiB
LLVM
68 lines
2.8 KiB
LLVM
; RUN: opt -passes=deadargelim -S < %s | FileCheck %s
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; Verify that the dbg.value intrinsics that use the dead argument and return
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; value are marked as undef to indicate that the values are optimized out.
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; Reproducer for PR23260.
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; CHECK-LABEL: define internal void @bar()
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; CHECK: call void @llvm.dbg.value(metadata i32 undef, metadata ![[LOCAL1:[0-9]+]]
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; CHECK: call void @sink()
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; Function Attrs: alwaysinline nounwind uwtable
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define internal i32 @bar(i32 %deadarg) #1 !dbg !10 {
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entry:
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call void @llvm.dbg.value(metadata i32 %deadarg, metadata !15, metadata !DIExpression()), !dbg !17
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call void @sink(), !dbg !17
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ret i32 123, !dbg !17
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}
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; CHECK-LABEL: define void @foo()
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; CHECK: call void @bar()
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; CHECK: call void @llvm.dbg.value(metadata i32 undef, metadata ![[LOCAL2:[0-9]+]]
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; CHECK: call void @bar()
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; Function Attrs: nounwind uwtable
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define void @foo() #0 !dbg !6 {
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entry:
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%deadret = call i32 @bar(i32 0), !dbg !9
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call void @llvm.dbg.value(metadata i32 %deadret, metadata !16, metadata !DIExpression()), !dbg !9
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call i32 @bar(i32 1), !dbg !9
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ret void, !dbg !9
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}
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declare void @sink() local_unnamed_addr
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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attributes #0 = { nounwind uwtable }
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attributes #1 = { alwaysinline nounwind uwtable }
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attributes #2 = { nounwind readnone speculatable }
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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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; CHECK: ![[LOCAL1]] = !DILocalVariable(name: "local1"
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; CHECK: ![[LOCAL2]] = !DILocalVariable(name: "local2"
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 8.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "pr23260.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 = !{!"clang version 8.0.0"}
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!6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !7, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!7 = !DISubroutineType(types: !8)
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!8 = !{null}
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!9 = !DILocation(line: 4, column: 3, scope: !6)
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!10 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 2, type: !11, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !14)
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!11 = !DISubroutineType(types: !12)
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!12 = !{!13, !13}
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!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!14 = !{!15}
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!15 = !DILocalVariable(name: "local1", arg: 1, scope: !10, file: !1, line: 2, type: !13)
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!16 = !DILocalVariable(name: "local2", arg: 1, scope: !6, file: !1, line: 2, type: !13)
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!17 = !DILocation(line: 2, column: 52, scope: !10)
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