forked from OSchip/llvm-project
58 lines
2.2 KiB
LLVM
58 lines
2.2 KiB
LLVM
; RUN: opt < %s -lcssa -S | FileCheck %s
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; This test ensures that LCSSA does not insert dbg.value intrinsics using
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; insertDebugValuesForPHIs() which effectively cause assignments to be
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; re-ordered.
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; See PR48206 for more information.
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define dso_local i32 @_Z5lcssab(i1 zeroext %S2) {
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entry:
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br label %loop.interior
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loop.interior: ; preds = %post.if, %entry
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br i1 %S2, label %if.true, label %if.false
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if.true: ; preds = %loop.interior
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%X1 = add i32 0, 0
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br label %post.if
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if.false: ; preds = %loop.interior
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%X2 = add i32 0, 1
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br label %post.if
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post.if: ; preds = %if.false, %if.true
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%X3 = phi i32 [ %X1, %if.true ], [ %X2, %if.false ], !dbg !21
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call void @llvm.dbg.value(metadata i32 %X3, metadata !9, metadata !DIExpression()), !dbg !21
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%Y1 = add i32 4, %X3, !dbg !22
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call void @llvm.dbg.value(metadata i32 %Y1, metadata !9, metadata !DIExpression()), !dbg !22
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br i1 %S2, label %loop.exit, label %loop.interior, !dbg !23
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loop.exit: ; preds = %post.if
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; CHECK: loop.exit:
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; CHECK-NEXT: %X3.lcssa = phi i32
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; CHECK-NOT: call void @llvm.dbg.value
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%X4 = add i32 3, %X3
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ret i32 %X4
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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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 and Author", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "./testcase.ll", directory: "/")
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!2 = !{}
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!3 = !{i32 11}
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!4 = !{i32 5}
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!5 = !{i32 2, !"Debug Info Version", i32 3}
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!6 = distinct !DISubprogram(name: "_Z5lcssab", linkageName: "_Z5lcssab", scope: null, file: !1, line: 1, type: !7, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !{!9})
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!7 = !DISubroutineType(types: !2)
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!9 = !DILocalVariable(name: "var", scope: !6, file: !1, line: 3, type: !10)
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!10 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned)
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!21 = !DILocation(line: 7, column: 1, scope: !6)
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!22 = !DILocation(line: 8, column: 1, scope: !6)
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!23 = !DILocation(line: 9, column: 1, scope: !6)
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