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69e607f200
This change simplifies code that has to deal with DIGlobalVariableExpression and mirrors how we treat DIExpressions in debug info intrinsics. Before this change there were two ways of representing empty expressions on globals, a nullptr and an empty !DIExpression(). If someone needs to upgrade out-of-tree testcases: perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll> will catch 95%. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312144 91177308-0d34-0410-b5e6-96231b3b80d8
76 lines
3.1 KiB
LLVM
76 lines
3.1 KiB
LLVM
; RUN: llc -mtriple x86_64-apple-macosx -O0 -filetype=obj -o %t_le.o %s
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; RUN: llvm-dwarfdump -debug-dump=info %t_le.o | FileCheck %s
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; Produced at -O0 from:
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; struct bitfield {
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; int a : 2;
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; int b : 32;
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; int c : 1;
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; int d : 28;
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; };
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; struct bitfield b;
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; Note that DWARF 2 counts bit offsets backwards from the high end of
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; the storage unit to the high end of the bit field.
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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_member
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; CHECK: DW_AT_byte_size {{.*}} (0x04)
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; CHECK-NEXT: DW_AT_bit_size {{.*}} (0x02)
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; CHECK-NEXT: DW_AT_bit_offset {{.*}} (0x1e)
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; CHECK-NEXT: DW_AT_data_member_location {{.*}} (DW_OP_plus_uconst 0x0)
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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_member
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; CHECK: DW_AT_data_member_location {{.*}} (DW_OP_plus_uconst 0x4)
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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_member
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; CHECK: DW_AT_byte_size {{.*}} (0x04)
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; CHECK-NEXT: DW_AT_bit_size {{.*}} (0x01)
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; CHECK-NEXT: DW_AT_bit_offset {{.*}} (0x1f)
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; CHECK: DW_AT_data_member_location {{.*}} (DW_OP_plus_uconst 0x8)
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; CHECK: DW_TAG_member
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; CHECK-NEXT: DW_AT_name{{.*}}"d"
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; CHECK-NOT: DW_TAG_member
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; CHECK: DW_AT_byte_size {{.*}} (0x04)
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; CHECK-NEXT: DW_AT_bit_size {{.*}} (0x1c)
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; CHECK-NEXT: DW_AT_bit_offset {{.*}} (0x03)
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; CHECK-NEXT: DW_AT_data_member_location {{.*}} (DW_OP_plus_uconst 0x8)
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; ModuleID = 'bitfields.c'
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source_filename = "test/DebugInfo/X86/bitfields.ll"
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx"
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%struct.bitfield = type <{ i8, [3 x i8], i64 }>
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@b = common global %struct.bitfield zeroinitializer, align 4, !dbg !0
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!13, !14, !15}
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!llvm.ident = !{!16}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 8, type: !6, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.7.0 (trunk 240548) (llvm/trunk 240554)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !4, globals: !5, imports: !4)
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!3 = !DIFile(filename: "bitfields.c", directory: "/")
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!4 = !{}
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!5 = !{!0}
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!6 = !DICompositeType(tag: DW_TAG_structure_type, name: "bitfield", file: !3, line: 1, size: 96, elements: !7)
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!7 = !{!8, !10, !11, !12}
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!8 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !6, file: !3, line: 2, baseType: !9, size: 2)
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!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!10 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !6, file: !3, line: 3, baseType: !9, size: 32, offset: 32)
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!11 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !6, file: !3, line: 4, baseType: !9, size: 1, offset: 64)
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!12 = !DIDerivedType(tag: DW_TAG_member, name: "d", scope: !6, file: !3, line: 5, baseType: !9, size: 28, offset: 65)
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!13 = !{i32 2, !"Dwarf Version", i32 2}
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!14 = !{i32 2, !"Debug Info Version", i32 3}
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!15 = !{i32 1, !"PIC Level", i32 2}
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!16 = !{!"clang version 3.7.0 (trunk 240548) (llvm/trunk 240554)"}
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