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1; This tests that emitting CodeView arrays doesn't assert when an ODR violation2; makes our array dimension size calculations inaccurate. (PR32383)3 4; Here was the scenario:5; $ cat a.cpp6; typedef union YYSTYPE { int x; } YYSTYPE;7; YYSTYPE a;8; $ cat b.cpp9; typedef union YYSTYPE { char x; } YYSTYPE;10; void fn1() { YYSTYPE a[1]; }11; $ clang-cl -c -Zi -flto a.cpp b.cpp12; $ llvm-link a.obj b.obj -S -o t.ll # This is the test case IR.13; $ llc t.ll # Used to assert14 15; RUN: llc < %s | FileCheck %s16 17; FIXME: sizeof(a) in the user program is 1, but we claim it is 4 because18; sometimes the frontend lies to us. See array-types-advanced.ll for an example.19;20; CHECK: # Array (0x1004)21; CHECK: .short 0xe # Record length22; CHECK: .short 0x1503 # Record kind: LF_ARRAY23; CHECK: .long 0x1003 # ElementType: YYSTYPE24; CHECK: .long 0x23 # IndexType: unsigned __int6425; CHECK: .short 0x4 # SizeOf26; CHECK: .byte 0 # Name27; CHECK: .byte 24128 29; CHECK: # Union (0x1006)30; CHECK: .short 0x22 # Record length31; CHECK: .short 0x1506 # Record kind: LF_UNION32; CHECK: .short 0x1 # MemberCount33; CHECK: .short 0x600 # Properties ( HasUniqueName (0x200) | Sealed (0x400) )34; CHECK: .long 0x1005 # FieldList: <field list>35; CHECK: .short 0x4 # SizeOf36; CHECK: .asciz "YYSTYPE" # Name37; CHECK: .asciz ".?ATYYSTYPE@@" # LinkageName38 39; ModuleID = 'llvm-link'40source_filename = "llvm-link"41target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"42target triple = "x86_64-pc-windows-msvc19.10.24728"43 44%union.YYSTYPE = type { i32 }45%union.YYSTYPE.0 = type { i8 }46 47@"\01?a@@3TYYSTYPE@@A" = global %union.YYSTYPE zeroinitializer, align 4, !dbg !048 49; Function Attrs: noinline nounwind sspstrong uwtable50define void @"\01?fn1@@YAXXZ"() #0 !dbg !21 {51entry:52 %a = alloca [1 x %union.YYSTYPE.0], align 153 call void @llvm.dbg.declare(metadata ptr %a, metadata !24, metadata !29), !dbg !3054 ret void, !dbg !3055}56 57; Function Attrs: nounwind readnone58declare void @llvm.dbg.declare(metadata, metadata, metadata) #159 60attributes #0 = { noinline nounwind sspstrong uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "use-soft-float"="false" }61attributes #1 = { nounwind readnone }62 63!llvm.dbg.cu = !{!2, !11}64!llvm.ident = !{!13, !13}65!llvm.module.flags = !{!18, !19, !20}66 67!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())68!1 = distinct !DIGlobalVariable(name: "a", linkageName: "\01?a@@3TYYSTYPE@@A", scope: !2, file: !3, line: 2, type: !6, isLocal: false, isDefinition: true)69!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 5.0.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)70!3 = !DIFile(filename: "a.cpp", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "c0005139aa3df153c30d8c6953390a4b")71!4 = !{}72!5 = !{!0}73!6 = !DIDerivedType(tag: DW_TAG_typedef, name: "YYSTYPE", file: !3, line: 1, baseType: !7)74!7 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "YYSTYPE", file: !3, line: 1, size: 32, elements: !8, identifier: ".?ATYYSTYPE@@")75!8 = !{!9}76!9 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !7, file: !3, line: 1, baseType: !10, size: 32)77!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)78!11 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !12, producer: "clang version 5.0.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4)79!12 = !DIFile(filename: "b.cpp", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "9cfd390d8827beab36769147bb037abc")80!13 = !{!"clang version 5.0.0 "}81!18 = !{i32 2, !"CodeView", i32 1}82!19 = !{i32 2, !"Debug Info Version", i32 3}83!20 = !{i32 1, !"PIC Level", i32 2}84!21 = distinct !DISubprogram(name: "fn1", linkageName: "\01?fn1@@YAXXZ", scope: !12, file: !12, line: 2, type: !22, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !11, retainedNodes: !4)85!22 = !DISubroutineType(types: !23)86!23 = !{null}87!24 = !DILocalVariable(name: "a", scope: !21, file: !12, line: 2, type: !25)88!25 = !DICompositeType(tag: DW_TAG_array_type, baseType: !26, size: 8, elements: !27)89!26 = !DIDerivedType(tag: DW_TAG_typedef, name: "YYSTYPE", file: !12, line: 1, baseType: !7)90!27 = !{!28}91!28 = !DISubrange(count: 1)92!29 = !DIExpression()93!30 = !DILocation(line: 2, scope: !21)94