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llvm-mirror/test/DebugInfo/COFF/unnamed-nested.ll
Amy Huang 995a26bf12 Reland "[codeview] Reference types in type parent scopes"
Summary:
Original description (https://reviews.llvm/org/D69924)
Without this change, when a nested tag type of any kind (enum, class,
struct, union) is used as a variable type, it is emitted without
emitting the parent type. In CodeView, parent types point to their inner
types, and inner types do not point back to their parents. We already
walk over all of the parent scopes to build the fully qualified name.
This change simply requests their type indices as we go along to enusre
they are all emitted.

Now, while walking over the parent scopes, add the types to
DeferredCompleteTypes, since they might already be in the process of
being emitted.

Fixes PR43905

Reviewers: rnk, amccarth

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D78249
2020-04-16 12:08:52 -07:00

52 lines
2.3 KiB
LLVM

; RUN: llc < %s -filetype=obj -o %t.o
; RUN: llvm-pdbutil dump -types %t.o | FileCheck %s
; C source to regenerate:
; $ clang -g -gcodeview -S -emit-llvm t.c
; $ cat t.c
; struct {
; union {
; struct {};
; };
; } S;
; Test that this compiles without errors.
; CHECK: LF_STRUCTURE{{.*}}<unnamed-tag>::<unnamed-tag>::<unnamed-tag>
; CHECK: LF_UNION{{.*}}<unnamed-tag>::<unnamed-tag>
; CHECK: LF_STRUCTURE{{.*}}<unnamed-tag>
; ModuleID = 't.c'
source_filename = "t.c"
target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc19.24.28316"
%struct.anon = type { %union.anon }
%union.anon = type { %struct.anon.0 }
%struct.anon.0 = type { [4 x i8] }
@S = dso_local global %struct.anon zeroinitializer, align 1, !dbg !0
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!13, !14, !15, !16}
!llvm.ident = !{!17}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "S", scope: !2, file: !3, line: 5, type: !6, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 11.0.0 (https://github.com/llvm/llvm-project.git 60d09bec7f8699728d38057430422d955d32a904)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)
!3 = !DIFile(filename: "t.c", directory: "C:\\src\\llvm-build", checksumkind: CSK_MD5, checksum: "c31fe86676dd2fb56f847f926c0f2c71")
!4 = !{}
!5 = !{!0}
!6 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 1, size: 32, elements: !7)
!7 = !{!8, !12}
!8 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !6, file: !3, line: 2, size: 32, elements: !9)
!9 = !{!10, !11}
!10 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !8, file: !3, line: 3, size: 32, elements: !4)
!11 = !DIDerivedType(tag: DW_TAG_member, scope: !8, file: !3, line: 3, baseType: !10, size: 32)
!12 = !DIDerivedType(tag: DW_TAG_member, scope: !6, file: !3, line: 2, baseType: !8, size: 32)
!13 = !{i32 2, !"CodeView", i32 1}
!14 = !{i32 2, !"Debug Info Version", i32 3}
!15 = !{i32 1, !"wchar_size", i32 2}
!16 = !{i32 7, !"PIC Level", i32 2}
!17 = !{!"clang version 11.0.0 (https://github.com/llvm/llvm-project.git 60d09bec7f8699728d38057430422d955d32a904)"}