468275dc49
PR #141106 changed the debug metadata to allow dynamic bit offsets and sizes. In that patch, I forgot to update AsmWriter to handle this case. This patch corrects the oversight.
65 lines
3.2 KiB
LLVM
65 lines
3.2 KiB
LLVM
; The use of llvm-dis here tests that round-tripping the IR works
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; correctly for the expression case.
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; RUN: llvm-as < %s | llvm-dis | llc -mtriple=x86_64 -O0 -filetype=obj -o - | llvm-dwarfdump -v -debug-info - | FileCheck %s
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; A basic test of using a DIExpression for DW_AT_data_bit_offset and
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; DW_AT_bit_size.
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source_filename = "bitfield.c"
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%struct.PackedBits = type <{ i8, i32 }>
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@s = common global %struct.PackedBits zeroinitializer, align 1, !dbg !2
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@value = common global i32 zeroinitializer, align 4, !dbg !0
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!llvm.dbg.cu = !{!4}
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!llvm.module.flags = !{!17, !18, !19}
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!llvm.ident = !{!20}
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!0 = distinct !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = !DIGlobalVariable(name: "value", scope: !4, file: !5, line: 8, type: !15, isLocal: false, isDefinition: true)
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!2 = distinct !DIGlobalVariableExpression(var: !3, expr: !DIExpression())
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!3 = !DIGlobalVariable(name: "s", scope: !4, file: !5, line: 8, type: !8, isLocal: false, isDefinition: true)
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!4 = distinct !DICompileUnit(language: DW_LANG_C99, file: !5, producer: "clang version 3.9.0 (trunk 267633)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !6, globals: !7)
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!5 = !DIFile(filename: "bitfield.c", directory: "/Volumes/Data/llvm")
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!6 = !{}
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!7 = !{!0, !2}
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!8 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "PackedBits", file: !5, line: 3, size: 40, elements: !9)
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!9 = !{!10, !12, !16}
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!10 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !8, file: !5, line: 5, baseType: !11, size: 8)
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; CHECK: DW_TAG_member
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; CHECK-NEXT: DW_AT_name{{.*}}"a"
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; CHECK-NOT: DW_TAG
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; CHECK-NOT: DW_AT_bit_offset
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; CHECK-NOT: DW_AT_data_bit_offset
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; CHECK: DW_AT_data_member_location [DW_FORM_data1] (0x00)
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!11 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!12 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !8, file: !5, line: 6, baseType: !13, size: !3, offset: !3, flags: DIFlagBitField)
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!13 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint32_t", file: !14, line: 183, baseType: !15)
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!14 = !DIFile(filename: "/Volumes/Data/llvm/_build.ninja.release/bin/../lib/clang/3.9.0/include/stdint.h", directory: "/Volumes/Data/llvm")
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!15 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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; CHECK: DW_TAG_member
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; CHECK-NEXT: DW_AT_name{{.*}}"b"
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; CHECK-NOT: DW_TAG
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; CHECK-NOT: DW_AT_bit_offset
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; CHECK-NOT: DW_AT_byte_size
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; CHECK: DW_AT_bit_size [DW_FORM_ref4] ({{.*}})
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; CHECK-NEXT: DW_AT_data_bit_offset [DW_FORM_ref4] ({{.*}})
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; CHECK-NOT: DW_AT_data_member_location
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!16 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !8, file: !5, line: 7, baseType: !13, size: !DIExpression(DW_OP_constu, 27), offset: !DIExpression(DW_OP_constu, 13), flags: DIFlagBitField)
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!17 = !{i32 2, !"Dwarf Version", i32 4}
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!18 = !{i32 2, !"Debug Info Version", i32 3}
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!19 = !{i32 1, !"PIC Level", i32 2}
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; CHECK: DW_TAG_member
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; CHECK-NEXT: DW_AT_name{{.*}}"c"
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; CHECK-NOT: DW_TAG
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; CHECK-NOT: DW_AT_bit_offset
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; CHECK-NOT: DW_AT_byte_size
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; CHECK: DW_AT_bit_size [DW_FORM_exprloc] (DW_OP_lit27)
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; CHECK-NEXT: DW_AT_data_bit_offset [DW_FORM_exprloc] (DW_OP_lit13)
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; CHECK-NOT: DW_AT_data_member_location
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; CHECK: DW_TAG
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!20 = !{!"clang version 3.9.0 (trunk 267633)"}
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