derek.holloway
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56 lines
2.2 KiB
LLVM
56 lines
2.2 KiB
LLVM
;; Check that adce salvages debug info properly.
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; RUN: opt -passes=adce -S < %s | FileCheck %s
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; ModuleID = 'test.ll'
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source_filename = "test.ll"
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; Function Attrs: nounwind readnone
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declare void @may_not_return(i32) #0
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; Function Attrs: nounwind readnone willreturn
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declare void @will_return(i32) #1
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define void @test(i32 %a) !dbg !6 {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: [[B:%.*]] = add i32 [[A:%.*]], 1
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; CHECK-NEXT: #dbg_value(i32 [[B]]
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; CHECK-NEXT: call void @may_not_return(i32 [[B]])
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; CHECK-NEXT: #dbg_value(i32 [[B]], {{.*}}DIExpression(DW_OP_plus_uconst, 1, DW_OP_stack_value)
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; CHECK-NEXT: ret void
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;
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%b = add i32 %a, 1, !dbg !12
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call void @llvm.dbg.value(metadata i32 %b, metadata !9, metadata !DIExpression()), !dbg !12
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call void @may_not_return(i32 %b), !dbg !13
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%c = add i32 %b, 1, !dbg !14
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call void @llvm.dbg.value(metadata i32 %c, metadata !11, metadata !DIExpression()), !dbg !14
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call void @will_return(i32 %c), !dbg !15
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ret void, !dbg !16
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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attributes #0 = { nounwind readnone }
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attributes #1 = { nounwind readnone willreturn }
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!llvm.dbg.cu = !{!0}
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!llvm.debugify = !{!3, !4}
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!llvm.module.flags = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "test.ll", directory: "/")
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!2 = !{}
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!3 = !{i32 5}
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!4 = !{i32 2}
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!5 = !{i32 2, !"Debug Info Version", i32 3}
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!6 = distinct !DISubprogram(name: "test", linkageName: "test", scope: null, file: !1, line: 1, type: !7, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
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!7 = !DISubroutineType(types: !2)
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!8 = !{!9, !11}
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!9 = !DILocalVariable(name: "1", scope: !6, file: !1, line: 1, type: !10)
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!10 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned)
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!11 = !DILocalVariable(name: "2", scope: !6, file: !1, line: 3, type: !10)
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!12 = !DILocation(line: 1, column: 1, scope: !6)
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!13 = !DILocation(line: 2, column: 1, scope: !6)
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!14 = !DILocation(line: 3, column: 1, scope: !6)
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!15 = !DILocation(line: 4, column: 1, scope: !6)
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!16 = !DILocation(line: 5, column: 1, scope: !6)
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