42 lines
1.5 KiB
LLVM
42 lines
1.5 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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; When removing the llvm.dbg.value intrinsic in the unreachable block
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; InstCombine would incorrectly return a false Modified status.
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; CHECK: cond.true:
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; CHECK-NEXT: br label %cond.end
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define i32 @foo() !dbg !7 {
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entry:
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br i1 false, label %cond.true, label %cond.end
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cond.true:
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call void @llvm.dbg.value(metadata i32 undef, metadata !12, metadata !DIExpression()), !dbg !13
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br label %cond.end
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cond.end:
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ret i32 undef
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata) #0
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attributes #0 = { nounwind readnone speculatable willreturn }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "foo.c", directory: "/")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!6 = !{!"clang version 12.0.0"}
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!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12, !12}
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!12 = !DILocalVariable(name: "bar", scope: !7, file: !1, line: 1, type: !10)
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!13 = !DILocation(line: 0, scope: !7)
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