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66 lines
3.3 KiB
66 lines
3.3 KiB
; RUN: llc < %s | FileCheck %s
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; Original C++ source:
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; struct Bits {
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; unsigned char b0 : 1;
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; unsigned char b1 : 1;
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; } bits;
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; const unsigned char *p_const;
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; In PR37492, there was an issue in global type hashing where we forgot to
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; consider the prefix portion of a type record when hashing it. This lead to a
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; collision between this LF_BITFIELD and LF_MODIFIER record, so we only emitted
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; one under the assumption that the other was redundant. Check that we emit both.
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; CHECK-LABEL: # BitField (0x1001)
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; CHECK-NEXT: .short 0xa # Record length
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; CHECK-NEXT: .short 0x1205 # Record kind: LF_BITFIELD
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; CHECK-NEXT: .long 0x20 # Type: unsigned char
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; CHECK-NEXT: .byte 0x1 # BitSize
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; CHECK-NEXT: .byte 0x0 # BitOffset
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; CHECK-NEXT: .byte 242
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; CHECK-NEXT: .byte 241
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; CHECK-LABEL: # Modifier (0x1007)
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; CHECK-NEXT: .short 0xa # Record length
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; CHECK-NEXT: .short 0x1001 # Record kind: LF_MODIFIER
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; CHECK-NEXT: .long 0x20 # ModifiedType: unsigned char
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; CHECK-NEXT: .short 0x1 # Modifiers ( Const (0x1) )
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; CHECK-NEXT: .byte 242
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; CHECK-NEXT: .byte 241
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; ModuleID = 't.cpp'
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source_filename = "t.cpp"
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc19.13.26131"
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%struct.Bits = type { i8 }
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@"?bits@@3UBits@@A" = dso_local global %struct.Bits zeroinitializer, align 1, !dbg !0
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@"?p_const@@3PEBEEB" = dso_local global i8* null, align 8, !dbg !6
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!15, !16, !17, !18}
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!llvm.ident = !{!19}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "bits", linkageName: "?bits@@3UBits@@A", scope: !2, file: !3, line: 4, type: !11, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 7.0.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
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!3 = !DIFile(filename: "t.cpp", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "8910833bbe8b669a3787c8f44dff1313")
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!4 = !{}
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!5 = !{!0, !6}
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!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
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!7 = distinct !DIGlobalVariable(name: "p_const", linkageName: "?p_const@@3PEBEEB", scope: !2, file: !3, line: 5, type: !8, isLocal: false, isDefinition: true)
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!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64)
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!9 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !10)
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!10 = !DIBasicType(name: "unsigned char", size: 8, encoding: DW_ATE_unsigned_char)
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!11 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "Bits", file: !3, line: 1, size: 8, flags: DIFlagTypePassByValue, elements: !12, identifier: ".?AUBits@@")
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!12 = !{!13, !14}
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!13 = !DIDerivedType(tag: DW_TAG_member, name: "b0", scope: !11, file: !3, line: 2, baseType: !10, size: 1, flags: DIFlagBitField, extraData: i64 0)
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!14 = !DIDerivedType(tag: DW_TAG_member, name: "b1", scope: !11, file: !3, line: 3, baseType: !10, size: 1, offset: 1, flags: DIFlagBitField, extraData: i64 0)
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!15 = !{i32 2, !"CodeView", i32 1}
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!16 = !{i32 2, !"Debug Info Version", i32 3}
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!17 = !{i32 1, !"wchar_size", i32 2}
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!18 = !{i32 7, !"PIC Level", i32 2}
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!19 = !{!"clang version 7.0.0 "}
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