72 lines
3.7 KiB
LLVM
72 lines
3.7 KiB
LLVM
; RUN: opt -simplifycfg -S < %s | FileCheck %s
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; Checks that when the if.then block is eliminated due to containing no
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; instructions, the debug intrinsics are hoisted out of the block before its
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; deletion. The hoisted intrinsics should have undef values as the branch
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; behaviour is unknown to the intrinsics after hoisting.
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define dso_local i32 @"?fn@@YAHH@Z"(i32 %foo) local_unnamed_addr !dbg !8 {
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entry:
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call void @llvm.dbg.value(metadata i32 %foo, metadata !13, metadata !DIExpression()), !dbg !16
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call void @llvm.dbg.value(metadata i32 0, metadata !14, metadata !DIExpression()), !dbg !16
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call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !16
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%cmp = icmp eq i32 %foo, 4, !dbg !17
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br i1 %cmp, label %if.then, label %if.else, !dbg !17
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if.then: ; preds = %entry
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call void @llvm.dbg.value(metadata i32 8, metadata !14, metadata !DIExpression()), !dbg !16
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call void @llvm.dbg.value(metadata i32 3, metadata !15, metadata !DIExpression()), !dbg !16
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br label %if.end, !dbg !18
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if.else: ; preds = %entry
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call void @"?side@@YAXXZ"(), !dbg !21
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call void @llvm.dbg.value(metadata i32 4, metadata !14, metadata !DIExpression()), !dbg !16
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call void @llvm.dbg.value(metadata i32 6, metadata !15, metadata !DIExpression()), !dbg !16
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br label %if.end, !dbg !23
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; CHECK-LABEL: if.end:
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if.end: ; preds = %if.else, %if.then
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; CHECK: call void @llvm.dbg.value(metadata i32 undef, metadata [[BEARDS:![0-9]+]]
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; CHECK: call void @llvm.dbg.value(metadata i32 undef, metadata [[BIRDS:![0-9]+]]
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%beards.0 = phi i32 [ 8, %if.then ], [ 4, %if.else ], !dbg !24
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call void @llvm.dbg.value(metadata i32 %beards.0, metadata !14, metadata !DIExpression()), !dbg !16
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ret i32 %beards.0, !dbg !25
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}
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declare dso_local void @"?side@@YAXXZ"() local_unnamed_addr
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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.module.flags = !{!3, !4, !5, !6}
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!llvm.ident = !{!7}
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; CHECK: [[BEARDS]] = !DILocalVariable(name: "beards"
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; CHECK: [[BIRDS]] = !DILocalVariable(name: "birds"
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "test2.cpp", directory: "C:\5Cdev\5Cllvm-project", checksumkind: CSK_MD5, checksum: "8ac5d40fcc9914d6479c1a770dfdc176")
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!2 = !{}
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!3 = !{i32 2, !"CodeView", i32 1}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 2}
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!6 = !{i32 7, !"PIC Level", i32 2}
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!7 = !{!"clang version 10.0.0 "}
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!8 = distinct !DISubprogram(name: "fn", linkageName: "?fn@@YAHH@Z", scope: !1, file: !1, line: 3, type: !9, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)
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!9 = !DISubroutineType(types: !10)
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!10 = !{!11, !11}
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!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!12 = !{!13, !14, !15}
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!13 = !DILocalVariable(name: "foo", arg: 1, scope: !8, file: !1, line: 3, type: !11)
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!14 = !DILocalVariable(name: "beards", scope: !8, file: !1, line: 4, type: !11)
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!15 = !DILocalVariable(name: "birds", scope: !8, file: !1, line: 5, type: !11)
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!16 = !DILocation(line: 0, scope: !8)
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!17 = !DILocation(line: 7, scope: !8)
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!18 = !DILocation(line: 10, scope: !19)
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!19 = distinct !DILexicalBlock(scope: !20, file: !1, line: 7)
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!20 = distinct !DILexicalBlock(scope: !8, file: !1, line: 7)
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!21 = !DILocation(line: 11, scope: !22)
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!22 = distinct !DILexicalBlock(scope: !20, file: !1, line: 10)
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!23 = !DILocation(line: 14, scope: !22)
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!24 = !DILocation(line: 0, scope: !20)
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!25 = !DILocation(line: 16, scope: !8)
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