bf82ff61a6
It is technically legal for optimizations to create an alloca that is used by more than one dbg.declare, if one or both of them are inlined instances of aliasing variables. Differential Revision: https://reviews.llvm.org/D85172
73 lines
4.5 KiB
LLVM
73 lines
4.5 KiB
LLVM
; Test that SROA can deal with allocas that have more than one
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; dbg.declare hanging off of it.
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; RUN: opt < %s -sroa -S | FileCheck %s
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source_filename = "/tmp/inlinesplit.cpp"
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target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.15.0"
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%struct.pair = type { i64, i64 }
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; Function Attrs: noinline optnone ssp uwtable
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define i64 @_Z1g4pair(i64 %p.coerce0, i64 %p.coerce1) #0 !dbg !8 {
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entry:
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%p = alloca %struct.pair, align 8
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%0 = getelementptr inbounds %struct.pair, %struct.pair* %p, i32 0, i32 0
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store i64 %p.coerce0, i64* %0, align 8
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%1 = getelementptr inbounds %struct.pair, %struct.pair* %p, i32 0, i32 1
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store i64 %p.coerce1, i64* %1, align 8
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; CHECK-DAG: call void @llvm.dbg.value(metadata i64 %p.coerce0, metadata ![[VAR:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)), !dbg ![[LOC:[0-9]+]]
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; CHECK-DAG: call void @llvm.dbg.value(metadata i64 %p.coerce1, metadata ![[VAR]], metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg ![[LOC]]
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; CHECK-DAG: call void @llvm.dbg.value(metadata i64 %p.coerce0, metadata ![[INLINED_VAR:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64)), !dbg ![[INLINED_LOC:[0-9]+]]
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; CHECK-DAG: call void @llvm.dbg.value(metadata i64 %p.coerce1, metadata ![[INLINED_VAR]], metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg ![[INLINED_LOC]]
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call void @llvm.dbg.declare(metadata %struct.pair* %p, metadata !17, metadata !DIExpression()), !dbg !18
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call void @llvm.dbg.declare(metadata %struct.pair* %p, metadata !21, metadata !DIExpression()), !dbg !23
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%a.i = getelementptr inbounds %struct.pair, %struct.pair* %p, i32 0, i32 0, !dbg !25
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%x2 = load i64, i64* %0, align 8, !dbg !25
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ret i64 %x2, !dbg !26
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: argmemonly nounwind willreturn
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) #2
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attributes #0 = { noinline ssp uwtable }
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attributes #1 = { nounwind readnone speculatable willreturn }
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attributes #2 = { argmemonly nounwind willreturn }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 12.0.0 (git@github.com:llvm/llvm-project 5110fd0343c2d06c8ae538741fbef13ece5e68de)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None, sysroot: "/")
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!1 = !DIFile(filename: "/tmp/inlinesplit.cpp", directory: "/Volumes/Data/llvm-project")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{i32 7, !"PIC Level", i32 2}
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!8 = distinct !DISubprogram(name: "g", linkageName: "_Z1g4pair", scope: !9, file: !9, line: 9, type: !10, scopeLine: 9, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!9 = !DIFile(filename: "/tmp/inlinesplit.cpp", directory: "")
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!10 = !DISubroutineType(types: !11)
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!11 = !{!12, !13}
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!12 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned)
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!13 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "pair", file: !9, line: 1, size: 128, flags: DIFlagTypePassByValue, elements: !14, identifier: "_ZTS4pair")
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!14 = !{!15, !16}
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!15 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !13, file: !9, line: 1, baseType: !12, size: 64)
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!16 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !13, file: !9, line: 1, baseType: !12, size: 64, offset: 64)
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!17 = !DILocalVariable(name: "p", arg: 1, scope: !8, file: !9, line: 9, type: !13)
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; CHECK: ![[LOC]] = !DILocation
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; CHECK-NOT: inlinedAt
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; CHECK: =
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!18 = !DILocation(line: 9, column: 27, scope: !8)
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!19 = !DILocation(line: 10, column: 12, scope: !8)
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!20 = !DILocation(line: 10, column: 10, scope: !8)
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!21 = !DILocalVariable(name: "p", arg: 1, scope: !22, file: !9, line: 5, type: !13)
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!22 = distinct !DISubprogram(name: "f", linkageName: "_ZL1f4pair", scope: !9, file: !9, line: 5, type: !10, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition, unit: !0, retainedNodes: !2)
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; CHECK: ![[INLINED_LOC]] = !DILocation({{.*}}inlinedAt
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!23 = !DILocation(line: 5, column: 27, scope: !22, inlinedAt: !24)
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!24 = distinct !DILocation(line: 10, column: 10, scope: !8)
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!25 = !DILocation(line: 6, column: 12, scope: !22, inlinedAt: !24)
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!26 = !DILocation(line: 10, column: 3, scope: !8)
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