derek.holloway
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52 lines
2.0 KiB
LLVM
52 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -S -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 | FileCheck %s
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; In 'simplifycfg', during the flattening of a 'br', the instructions for the
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; 'true' and 'false' parts, are moved out from their respective basic blocks.
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; Their original debug locations (DILocations) and debug intrinsic instructions
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; (dbg.values) are removed.
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; As those basic blocks are now empty, their associated labels are removed.
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;
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; For the given test case, the labels 'W' and 'cleanup4' are removed.
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; We're expecting the dbg.label associated with 'W' to disappear, because
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; the 'W' label was removed.
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define i16 @_Z7test_itv(i1 %c) {
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; CHECK-LABEL: @_Z7test_itv(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[RETVAL_0:%.*]] = select i1 [[C:%.*]], i16 1, i16 0
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; CHECK-NEXT: ret i16 0
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;
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entry:
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br label %sw.bb
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sw.bb: ; preds = %entry
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br i1 %c, label %W, label %cleanup4
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W: ; preds = %sw.bb
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call void @llvm.dbg.label(metadata !1), !dbg !8
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br label %cleanup4
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cleanup4: ; preds = %W, %sw.bb
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%retval.0 = phi i16 [ 1, %W ], [ 0, %sw.bb ]
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ret i16 0
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.label(metadata) #0
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attributes #0 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{}
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!llvm.module.flags = !{!0}
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!0 = !{i32 2, !"Debug Info Version", i32 3}
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!1 = !DILabel(scope: !2, name: "W", file: !3, line: 47)
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!2 = distinct !DILexicalBlock(scope: !4, file: !3, line: 40, column: 3)
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!3 = !DIFile(filename: "foo.c", directory: "./")
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!4 = distinct !DISubprogram(name: "test_it", scope: !3, file: !3, line: 35, type: !5, scopeLine: 36, unit: !7)
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!5 = !DISubroutineType(types: !6)
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!6 = !{}
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!7 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!8 = !DILocation(line: 47, column: 2, scope: !2)
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