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llvm-project/llvm/test/DebugInfo/X86/bitfields-dwarf4.ll

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Debug info: Support DWARF4 bitfields via DW_AT_data_bit_offset. The DWARF2 specification of DW_AT_bit_offset was written from the perspective of a big-endian machine with unclear semantics for other systems. DWARF4 deprecated DW_AT_bit_offset and introduced a new attribute DW_AT_data_bit_offset that simply counts the number of bits from the beginning of the containing entity regardless of endianness. After this patch LLVM emits DW_AT_bit_offset for DWARF 2 or 3 and DW_AT_data_bit_offset when DWARF 4 or later is requested. llvm-svn: 267895
2016-04-28 23:37:48 +08:00
; RUN: llc -mtriple x86_64-apple-macosx -O0 -filetype=obj -o - %s \
llvm-dwarfdump: Make -brief the default and add a -verbose option instead. Differential Revision: https://reviews.llvm.org/D37717 llvm-svn: 312972
2017-09-12 07:05:20 +08:00
; RUN: | llvm-dwarfdump -v -debug-info - | FileCheck %s
Debug Info: Don't emit bitfields in the DWARF4 format when tuning for GDB. As discovered in PR27758, GDB does not fully support the DWARF 4 format. This patch ensures we always emit bitfields in the DWARF 2 when tuning for GDB. llvm-svn: 269827
2016-05-18 04:12:08 +08:00
; RUN: llc -mtriple x86_64-gnu-linux -O0 -filetype=obj -o - %s \
llvm-dwarfdump: Make -brief the default and add a -verbose option instead. Differential Revision: https://reviews.llvm.org/D37717 llvm-svn: 312972
2017-09-12 07:05:20 +08:00
; RUN: | llvm-dwarfdump -v -debug-info - | FileCheck %s --check-prefix=LINUX
Debug Info: Don't emit bitfields in the DWARF4 format when tuning for GDB. As discovered in PR27758, GDB does not fully support the DWARF 4 format. This patch ensures we always emit bitfields in the DWARF 2 when tuning for GDB. llvm-svn: 269827
2016-05-18 04:12:08 +08:00
; LINUX-NOT: DW_AT_data_bit_offset
Debug info: Support DWARF4 bitfields via DW_AT_data_bit_offset. The DWARF2 specification of DW_AT_bit_offset was written from the perspective of a big-endian machine with unclear semantics for other systems. DWARF4 deprecated DW_AT_bit_offset and introduced a new attribute DW_AT_data_bit_offset that simply counts the number of bits from the beginning of the containing entity regardless of endianness. After this patch LLVM emits DW_AT_bit_offset for DWARF 2 or 3 and DW_AT_data_bit_offset when DWARF 4 or later is requested. llvm-svn: 267895
2016-04-28 23:37:48 +08:00
;
; Generated from:
; #include <stdint.h>
; #pragma pack(1)
; struct PackedBits
; {
; char a;
; uint32_t b : 5,
; c : 27
; } s;
; #pragma pack()
source_filename = "bitfield.c"
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx"
%struct.PackedBits = type <{ i8, i32 }>
Renumber testcase metadata nodes after r290153. This patch renumbers the metadata nodes in debug info testcases after https://reviews.llvm.org/D26769. This is a separate patch because it causes so much churn. This was implemented with a python script that pipes the testcases through llvm-as - | llvm-dis - and then goes through the original and new output side-by side to insert all comments at a close-enough location. Differential Revision: https://reviews.llvm.org/D27765 llvm-svn: 290292
2016-12-22 08:45:21 +08:00
@s = common global %struct.PackedBits zeroinitializer, align 1, !dbg !0
Debug info: Support DWARF4 bitfields via DW_AT_data_bit_offset. The DWARF2 specification of DW_AT_bit_offset was written from the perspective of a big-endian machine with unclear semantics for other systems. DWARF4 deprecated DW_AT_bit_offset and introduced a new attribute DW_AT_data_bit_offset that simply counts the number of bits from the beginning of the containing entity regardless of endianness. After this patch LLVM emits DW_AT_bit_offset for DWARF 2 or 3 and DW_AT_data_bit_offset when DWARF 4 or later is requested. llvm-svn: 267895
2016-04-28 23:37:48 +08:00
Renumber testcase metadata nodes after r290153. This patch renumbers the metadata nodes in debug info testcases after https://reviews.llvm.org/D26769. This is a separate patch because it causes so much churn. This was implemented with a python script that pipes the testcases through llvm-as - | llvm-dis - and then goes through the original and new output side-by side to insert all comments at a close-enough location. Differential Revision: https://reviews.llvm.org/D27765 llvm-svn: 290292
2016-12-22 08:45:21 +08:00
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!15, !16, !17}
!llvm.ident = !{!18}
Debug info: Support DWARF4 bitfields via DW_AT_data_bit_offset. The DWARF2 specification of DW_AT_bit_offset was written from the perspective of a big-endian machine with unclear semantics for other systems. DWARF4 deprecated DW_AT_bit_offset and introduced a new attribute DW_AT_data_bit_offset that simply counts the number of bits from the beginning of the containing entity regardless of endianness. After this patch LLVM emits DW_AT_bit_offset for DWARF 2 or 3 and DW_AT_data_bit_offset when DWARF 4 or later is requested. llvm-svn: 267895
2016-04-28 23:37:48 +08:00
Canonicalize the representation of empty an expression in DIGlobalVariableExpression 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%. llvm-svn: 312144
2017-08-31 02:06:51 +08:00
!0 = distinct !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
Renumber testcase metadata nodes after r290153. This patch renumbers the metadata nodes in debug info testcases after https://reviews.llvm.org/D26769. This is a separate patch because it causes so much churn. This was implemented with a python script that pipes the testcases through llvm-as - | llvm-dis - and then goes through the original and new output side-by side to insert all comments at a close-enough location. Differential Revision: https://reviews.llvm.org/D27765 llvm-svn: 290292
2016-12-22 08:45:21 +08:00
!1 = !DIGlobalVariable(name: "s", scope: !2, file: !3, line: 8, type: !6, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.9.0 (trunk 267633)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
!3 = !DIFile(filename: "bitfield.c", directory: "/Volumes/Data/llvm")
!4 = !{}
!5 = !{!0}
!6 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "PackedBits", file: !3, line: 3, size: 40, elements: !7)
!7 = !{!8, !10, !14}
!8 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !6, file: !3, line: 5, baseType: !9, size: 8)
Debug info: Support DWARF4 bitfields via DW_AT_data_bit_offset. The DWARF2 specification of DW_AT_bit_offset was written from the perspective of a big-endian machine with unclear semantics for other systems. DWARF4 deprecated DW_AT_bit_offset and introduced a new attribute DW_AT_data_bit_offset that simply counts the number of bits from the beginning of the containing entity regardless of endianness. After this patch LLVM emits DW_AT_bit_offset for DWARF 2 or 3 and DW_AT_data_bit_offset when DWARF 4 or later is requested. llvm-svn: 267895
2016-04-28 23:37:48 +08:00
; CHECK: DW_TAG_member
; CHECK-NEXT: DW_AT_name{{.*}}"a"
; CHECK-NOT: DW_TAG
; CHECK-NOT: DW_AT_bit_offset
; CHECK-NOT: DW_AT_data_bit_offset
; CHECK: DW_AT_data_member_location [DW_FORM_data1] (0x00)
Renumber testcase metadata nodes after r290153. This patch renumbers the metadata nodes in debug info testcases after https://reviews.llvm.org/D26769. This is a separate patch because it causes so much churn. This was implemented with a python script that pipes the testcases through llvm-as - | llvm-dis - and then goes through the original and new output side-by side to insert all comments at a close-enough location. Differential Revision: https://reviews.llvm.org/D27765 llvm-svn: 290292
2016-12-22 08:45:21 +08:00
!9 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
!10 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !6, file: !3, line: 6, baseType: !11, size: 5, offset: 8)
!11 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint32_t", file: !12, line: 183, baseType: !13)
!12 = !DIFile(filename: "/Volumes/Data/llvm/_build.ninja.release/bin/../lib/clang/3.9.0/include/stdint.h", directory: "/Volumes/Data/llvm")
!13 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
Debug info: Support DWARF4 bitfields via DW_AT_data_bit_offset. The DWARF2 specification of DW_AT_bit_offset was written from the perspective of a big-endian machine with unclear semantics for other systems. DWARF4 deprecated DW_AT_bit_offset and introduced a new attribute DW_AT_data_bit_offset that simply counts the number of bits from the beginning of the containing entity regardless of endianness. After this patch LLVM emits DW_AT_bit_offset for DWARF 2 or 3 and DW_AT_data_bit_offset when DWARF 4 or later is requested. llvm-svn: 267895
2016-04-28 23:37:48 +08:00
; CHECK: DW_TAG_member
; CHECK-NEXT: DW_AT_name{{.*}}"b"
; CHECK-NOT: DW_TAG
; CHECK-NOT: DW_AT_bit_offset
Debug info: Don't emit a DW_AT_byte_size when emitting a DWARF4 bit field. The DWARF spec clearly states that a bit field member should have either a DW_AT_byte_size or a DW_AT_bit_size, but not both. Also the DW_AT_byte_size is redundant with the size of the type of the member. This fixes a bug found in PR 27758. llvm-svn: 269714
2016-05-17 06:45:10 +08:00
; CHECK-NOT: DW_AT_byte_size
; CHECK: DW_AT_bit_size [DW_FORM_data1] (0x05)
; CHECK-NOT: DW_AT_byte_size
; CHECK-NEXT: DW_AT_data_bit_offset [DW_FORM_data1] (0x08)
Debug Info: Don't emit a DW_AT_data_member_location for DWARF bitfields. The DWARF spec states that a member entry may have either a DW_AT_data_member_location or a DW_AT_data_bit_offset, but not both. This fixes a bug found in PR 27758. llvm-svn: 269731
2016-05-17 10:37:53 +08:00
; CHECK-NOT: DW_AT_data_member_location
Renumber testcase metadata nodes after r290153. This patch renumbers the metadata nodes in debug info testcases after https://reviews.llvm.org/D26769. This is a separate patch because it causes so much churn. This was implemented with a python script that pipes the testcases through llvm-as - | llvm-dis - and then goes through the original and new output side-by side to insert all comments at a close-enough location. Differential Revision: https://reviews.llvm.org/D27765 llvm-svn: 290292
2016-12-22 08:45:21 +08:00
!14 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !6, file: !3, line: 7, baseType: !11, size: 27, offset: 13)
!15 = !{i32 2, !"Dwarf Version", i32 4}
!16 = !{i32 2, !"Debug Info Version", i32 3}
!17 = !{i32 1, !"PIC Level", i32 2}
Debug info: Support DWARF4 bitfields via DW_AT_data_bit_offset. The DWARF2 specification of DW_AT_bit_offset was written from the perspective of a big-endian machine with unclear semantics for other systems. DWARF4 deprecated DW_AT_bit_offset and introduced a new attribute DW_AT_data_bit_offset that simply counts the number of bits from the beginning of the containing entity regardless of endianness. After this patch LLVM emits DW_AT_bit_offset for DWARF 2 or 3 and DW_AT_data_bit_offset when DWARF 4 or later is requested. llvm-svn: 267895
2016-04-28 23:37:48 +08:00
; CHECK: DW_TAG_member
; CHECK-NEXT: DW_AT_name{{.*}}"c"
; CHECK-NOT: DW_TAG
; CHECK-NOT: DW_AT_bit_offset
Debug info: Don't emit a DW_AT_byte_size when emitting a DWARF4 bit field. The DWARF spec clearly states that a bit field member should have either a DW_AT_byte_size or a DW_AT_bit_size, but not both. Also the DW_AT_byte_size is redundant with the size of the type of the member. This fixes a bug found in PR 27758. llvm-svn: 269714
2016-05-17 06:45:10 +08:00
; CHECK-NOT: DW_AT_byte_size
; CHECK: DW_AT_bit_size [DW_FORM_data1] (0x1b)
; CHECK-NEXT: DW_AT_data_bit_offset [DW_FORM_data1] (0x0d)
Debug Info: Don't emit a DW_AT_data_member_location for DWARF bitfields. The DWARF spec states that a member entry may have either a DW_AT_data_member_location or a DW_AT_data_bit_offset, but not both. This fixes a bug found in PR 27758. llvm-svn: 269731
2016-05-17 10:37:53 +08:00
; CHECK-NOT: DW_AT_data_member_location
; CHECK: DW_TAG
Renumber testcase metadata nodes after r290153. This patch renumbers the metadata nodes in debug info testcases after https://reviews.llvm.org/D26769. This is a separate patch because it causes so much churn. This was implemented with a python script that pipes the testcases through llvm-as - | llvm-dis - and then goes through the original and new output side-by side to insert all comments at a close-enough location. Differential Revision: https://reviews.llvm.org/D27765 llvm-svn: 290292
2016-12-22 08:45:21 +08:00
!18 = !{!"clang version 3.9.0 (trunk 267633)"}
Debug info: Support DWARF4 bitfields via DW_AT_data_bit_offset. The DWARF2 specification of DW_AT_bit_offset was written from the perspective of a big-endian machine with unclear semantics for other systems. DWARF4 deprecated DW_AT_bit_offset and introduced a new attribute DW_AT_data_bit_offset that simply counts the number of bits from the beginning of the containing entity regardless of endianness. After this patch LLVM emits DW_AT_bit_offset for DWARF 2 or 3 and DW_AT_data_bit_offset when DWARF 4 or later is requested. llvm-svn: 267895
2016-04-28 23:37:48 +08:00