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[ARM64] Debug info for structure argument missing DW_AT_location

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Summary:
Prevent eliminating dbg_val due to COPY.

Fixes this
https://bugs.llvm.org/show_bug.cgi?id=40709

Patch by: Kamlesh Kumar (kamleshbhalui)

Reviewers: aprantl, dblaikie, vsk, dsanders

Reviewed By: dsanders

Subscribers: dstenb, kristof.beyls, hiraditya, llvm-commits

Tags: #debug-info, #llvm

Differential Revision: https://reviews.llvm.org/D73159
This commit is contained in:
David Stenberg 2020-01-29 09:44:02 +01:00
parent 838c174864
commit c38f7a01f2
2 changed files with 52 additions and 1 deletions
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2
lib/CodeGen/GlobalISel/InstructionSelect.cpp
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@ -175,7 +175,7 @@ bool InstructionSelect::runOnMachineFunction(MachineFunction &MF) {
auto DstRC = MRI.getRegClass(DstReg);
if (SrcRC == DstRC) {
MRI.replaceRegWith(DstReg, SrcReg);
MI.eraseFromParentAndMarkDBGValuesForRemoval();
MI.eraseFromParent();
}
}
}

51
test/DebugInfo/AArch64/pr40709.ll Normal file
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@ -0,0 +1,51 @@
; RUN: llc -global-isel=1 -filetype=obj -mtriple=aarch64-linux-gnu -o - %s | llvm-dwarfdump -v - | FileCheck %s
;
; CHECK: .debug_info contents:
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_AT_location
%struct.mystruct = type { double, double, double, double, double }
@.str = private unnamed_addr constant [5 x i8] c"%llu\00", align 1
define dso_local void @foo(%struct.mystruct* %ms) !dbg !9 {
entry:
call void @llvm.dbg.declare(metadata %struct.mystruct* %ms, metadata !21, metadata !DIExpression()), !dbg !22
%0 = ptrtoint %struct.mystruct* %ms to i64, !dbg !23
%call = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i64 %0), !dbg !24
ret void, !dbg !25
}
declare void @llvm.dbg.declare(metadata, metadata, metadata)
declare dso_local i32 @printf(i8*, ...)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!5, !6, !7}
!llvm.ident = !{!8}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: ".", directory: ".")
!2 = !{}
!3 = !{!4}
!4 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned)
!5 = !{i32 7, !"Dwarf Version", i32 4}
!6 = !{i32 2, !"Debug Info Version", i32 3}
!7 = !{i32 1, !"wchar_size", i32 4}
!8 = !{!"clang version 10.0.0"}
!9 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 5, type: !10, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!10 = !DISubroutineType(types: !11)
!11 = !{null, !12}
!12 = !DIDerivedType(tag: DW_TAG_typedef, name: "mystruct", file: !1, line: 3, baseType: !13)
!13 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !1, line: 1, size: 320, elements: !14)
!14 = !{!15, !17, !18, !19, !20}
!15 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !13, file: !1, line: 2, baseType: !16, size: 64)
!16 = !DIBasicType(name: "double", size: 64, encoding: DW_ATE_float)
!17 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !13, file: !1, line: 2, baseType: !16, size: 64, offset: 64)
!18 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !13, file: !1, line: 2, baseType: !16, size: 64, offset: 128)
!19 = !DIDerivedType(tag: DW_TAG_member, name: "d", scope: !13, file: !1, line: 2, baseType: !16, size: 64, offset: 192)
!20 = !DIDerivedType(tag: DW_TAG_member, name: "e", scope: !13, file: !1, line: 2, baseType: !16, size: 64, offset: 256)
!21 = !DILocalVariable(name: "ms", arg: 1, scope: !9, file: !1, line: 5, type: !12)
!22 = !DILocation(line: 5, column: 19, scope: !9)
!23 = !DILocation(line: 7, column: 1, scope: !9)
!24 = !DILocation(line: 6, column: 5, scope: !9)
!25 = !DILocation(line: 8, column: 1, scope: !9)