55 lines
2.5 KiB
LLVM
55 lines
2.5 KiB
LLVM
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; RUN: opt -disable-basic-aa -enable-new-pm=0 -print-memoryssa -disable-output %s 2>&1 | FileCheck %s
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; Note that the test crashes the MemorySSA verification when doing loop-rotate,
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; if debuginfo is modelled in MemorySSA, due to the fact that MemorySSA is not
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; updated when adding/removing debuginfo intrinsics.
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target triple = "x86_64-unknown-linux-gnu"
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; CHECK-LABEL: @overflow_iter_var
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; CHECK-NOT: MemoryDef
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define void @overflow_iter_var() !dbg !11 {
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entry:
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call void @llvm.dbg.value(metadata i16 0, metadata !16, metadata !DIExpression()), !dbg !18
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br label %for.cond
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for.cond: ; preds = %for.body, %entry
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call void @llvm.dbg.value(metadata i16 0, metadata !16, metadata !DIExpression()), !dbg !18
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call void @llvm.dbg.value(metadata i16 undef, metadata !20, metadata !DIExpression()), !dbg !21
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br i1 undef, label %for.end, label %for.body
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for.body: ; preds = %for.cond
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%0 = load i16, i16* undef, align 1
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br label %for.cond
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for.end: ; preds = %for.cond
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ret void
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #1 = { nounwind readnone speculatable willreturn }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!10}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3, nameTableKind: None)
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!1 = !DIFile(filename: "2_loops.c", directory: "/")
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!2 = !{}
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!3 = !{}
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!6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 4096, elements: !8)
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!7 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
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!8 = !{!9}
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!9 = !DISubrange(count: 256)
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!10 = !{i32 2, !"Debug Info Version", i32 3}
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!11 = distinct !DISubprogram(name: "overflow_iter_var", scope: !1, file: !1, line: 20, type: !12, scopeLine: 21, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!12 = !DISubroutineType(types: !13)
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!13 = !{null, !14, !14}
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!14 = !DIBasicType(name: "unsigned int", size: 16, encoding: DW_ATE_unsigned)
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!16 = !DILocalVariable(name: "i", scope: !17, file: !1, line: 23, type: !14)
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!17 = distinct !DILexicalBlock(scope: !11, file: !1, line: 23, column: 3)
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!18 = !DILocation(line: 0, scope: !17)
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!20 = !DILocalVariable(name: "stop1", arg: 1, scope: !11, file: !1, line: 20, type: !14)
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!21 = !DILocation(line: 0, scope: !11)
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