forked from OSchip/llvm-project
65 lines
2.9 KiB
LLVM
65 lines
2.9 KiB
LLVM
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; RUN: opt < %s -mem2reg -S | FileCheck %s
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; Testing conversion from dbg.declare to dbg.value when the variable is a VLA.
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;
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; We can't derive the size of the variable since it is a VLA with an unknown
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; number of element.
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;
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; Verify that we do not get a dbg.value after the phi node (we can't know if
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; the phi nodes result describes the whole array or not). Also verify that we
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; get a dbg.value that says that we do not know the value of the VLA in place
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; of the store (since we do not know which part of the VLA the store is
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; writing to).
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; ModuleID = 'debug-alloca-vla.ll'
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.12.0"
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; Function Attrs: nounwind ssp uwtable
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define void @scan(i32 %n) #0 !dbg !4 {
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entry:
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%vla1 = alloca i32, i32 %n, align 8
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call void @llvm.dbg.declare(metadata i32* %vla1, metadata !10, metadata !DIExpression()), !dbg !18
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br label %for.cond, !dbg !18
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for.cond: ; preds = %for.cond, %entry
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; CHECK: %[[PHI:.*]] = phi i32 [ undef, %entry ], [ %t0, %for.cond ]
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%entryN = load i32, i32* %vla1, align 8, !dbg !18
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; CHECK-NOT: call void @llvm.dbg.value
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%t0 = add i32 %entryN, 1
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; CHECK: %t0 = add i32 %[[PHI]], 1
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; CHECK: call void @llvm.dbg.value(metadata i32 undef,
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; CHECK-SAME: metadata !DIExpression())
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store i32 %t0, i32* %vla1, align 8, !dbg !18
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br label %for.cond, !dbg !18
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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attributes #0 = { nounwind ssp uwtable }
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attributes #1 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "adrian", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "<stdin>", directory: "/")
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!2 = !{i32 2, !"Debug Info Version", i32 3}
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!3 = !{i32 7, !"PIC Level", i32 2}
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!4 = distinct !DISubprogram(name: "scan", scope: !1, file: !1, line: 4, type: !5, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null, !7, !7}
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!7 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!8 = !{!9}
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!9 = !DILocalVariable(name: "entry", scope: !4, file: !1, line: 6, type: !7)
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!10 = !DILocalVariable(name: "ptr32", scope: !4, file: !1, line: 240, type: !11)
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!11 = !DICompositeType(tag: DW_TAG_array_type, baseType: !12, elements: !14)
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!12 = !DIDerivedType(tag: DW_TAG_typedef, name: "__uint32_t", file: !1, line: 41, baseType: !13)
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!13 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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!14 = !{!15}
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!15 = !DISubrange(count: !16)
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!16 = !DILocalVariable(name: "__vla_expr", scope: !4, type: !17, flags: DIFlagArtificial)
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!17 = !DIBasicType(name: "long unsigned int", size: 64, encoding: DW_ATE_unsigned)
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!18 = !DILocation(line: 6, scope: !4)
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