caio/clang-p2996
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
c6c7bfc4d2bc37f55f57504c19d47deb7645dd76
clang-p2996/llvm/test/DebugInfo/X86/split-dwarf-cross-unit-reference.ll
Shiva Chen 2c864551df [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 
In order to set breakpoints on labels and list source code around
labels, we need collect debug information for labels, i.e., label
name, the function label belong, line number in the file, and the
address label located. In order to keep these information in LLVM
IR and to allow backend to generate debug information correctly.
We create a new kind of metadata for labels, DILabel. The format
of DILabel is

!DILabel(scope: !1, name: "foo", file: !2, line: 3)

We hope to keep debug information as much as possible even the
code is optimized. So, we create a new kind of intrinsic for label
metadata to avoid the metadata is eliminated with basic block.
The intrinsic will keep existing if we keep it from optimized out.
The format of the intrinsic is

llvm.dbg.label(metadata !1)

It has only one argument, that is the DILabel metadata. The
intrinsic will follow the label immediately. Backend could get the
label metadata through the intrinsic's parameter.

We also create DIBuilder API for labels to be used by Frontend.
Frontend could use createLabel() to allocate DILabel objects, and use
insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR.

Differential Revision: https://reviews.llvm.org/D45024

Patch by Hsiangkai Wang.

llvm-svn: 331841
2018-05-09 02:40:45 +00:00

196 lines
9.5 KiB
LLVM
Raw Blame History

; RUN: llc -mtriple=x86_64-linux -split-dwarf-cross-cu-references -split-dwarf-file=foo.dwo -filetype=obj -o %t < %s
; RUN: llvm-objdump -r %t | FileCheck %s
; RUN: llvm-dwarfdump -v -debug-info %t | FileCheck --check-prefix=ALL --check-prefix=INFO --check-prefix=DWO --check-prefix=CROSS %s
; RUN: llvm-dwarfdump -v -debug-info %t | FileCheck --check-prefix=ALL --check-prefix=INFO %s
; RUN: llc -mtriple=x86_64-linux -split-dwarf-file=foo.dwo -filetype=obj -o %t < %s
; RUN: llvm-objdump -r %t | FileCheck %s
; RUN: llvm-dwarfdump -v -debug-info %t | FileCheck --check-prefix=ALL --check-prefix=DWO --check-prefix=NOCROSS %s
; RUN: llvm-dwarfdump -v -debug-info %t | FileCheck --check-prefix=ALL --check-prefix=INFO %s
; Testing cross-CU references for types, subprograms, and variables
; Built from code something like this:
; foo.cpp:
; struct t1 { int i; };
; void f();
; __attribute__((always_inline)) void f1(t1 t) {
; f();
; }
; void foo(t1 t) {
; f1(t);
; }
; bar.cpp:
; struct t1 { int i; };
; void f1(t1);
; void bar(t1 t) {
; f1(t);
; }
; $ clang++-tot -emit-llvm -S {foo,bar}.cpp -g
; $ llvm-link-tot {foo,bar}.ll -S -o foobar.ll
; $ clang++-tot -emit-llvm foobar.ll -o foobar.opt.ll -S -c
;
; Then manually removing the original f1 definition, to simplify the DWARF a bit
; (so it only has the inlined definitions, no concrete definition)
; Check that:
; * no relocations are emitted for the debug_info.dwo section no matter what
; * one debug_info->debug_info relocation in debug_info no matter what (for
; split dwarf inlining)
; * debug_info uses relocations and ref_addr no matter what
; * debug_info.dwo uses relocations for types as well as abstract subprograms
; and variables when -split-dwarf-cross-cu-references is used
; * debug_info.dwo contains duplicate types, abstract subprograms and abstract
; variables otherwise to avoid the need for cross-cu references
; DWO: .debug_info.dwo contents:
; CHECK-NOT: .rel{{a?}}.debug_info.dwo
; CHECK: RELOCATION RECORDS FOR [.rel{{a?}}.debug_info]:
; CHECK-NOT: RELOCATION RECORDS
; Expect one relocation in debug_info, from the inlined f1 in foo to its
; abstract origin in bar
; CHECK: R_X86_64_32 .debug_info
; CHECK-NOT: RELOCATION RECORDS
; CHECK-NOT: .debug_info
; CHECK: RELOCATION RECORDS
; CHECK-NOT: .rel{{a?}}.debug_info.dwo
; ALL: Compile Unit
; ALL: DW_TAG_compile_unit
; DWO: DW_AT_name {{.*}} "foo.cpp"
; ALL: 0x[[F1:.*]]: DW_TAG_subprogram
; ALL: DW_AT_name {{.*}} "f1"
; DWO: 0x[[F1T:.*]]: DW_TAG_formal_parameter
; DWO: DW_AT_name {{.*}} "t"
; DWO: DW_AT_type [DW_FORM_ref4] {{.*}}{0x[[T1:.*]]}
; DWO: NULL
; DWO: 0x[[T1]]: DW_TAG_structure_type
; DWO: DW_AT_name {{.*}} "t1"
; ALL: DW_TAG_subprogram
; ALL: DW_AT_name {{.*}} "foo"
; DWO: DW_TAG_formal_parameter
; DWO: DW_AT_name {{.*}} "t"
; DWO: DW_AT_type [DW_FORM_ref4] {{.*}}{0x[[T1]]}
; ALL: DW_TAG_inlined_subroutine
; ALL: DW_AT_abstract_origin [DW_FORM_ref4] {{.*}}{0x[[F1]]}
; DWO: DW_TAG_formal_parameter
; DWO: DW_AT_abstract_origin [DW_FORM_ref4] {{.*}}{0x[[F1T]]}
; ALL: Compile Unit
; ALL: DW_TAG_compile_unit
; DWO: DW_AT_name {{.*}} "bar.cpp"
; NOCROSS: 0x[[BAR_F1:.*]]: DW_TAG_subprogram
; NOCROSS: DW_AT_name {{.*}} "f1"
; NOCROSS: 0x[[BAR_F1T:.*]]: DW_TAG_formal_parameter
; NOCROSS: DW_AT_name {{.*}} "t"
; NOCROSS: DW_AT_type [DW_FORM_ref4] {{.*}}{0x[[BAR_T1:.*]]}
; NOCROSS: NULL
; NOCROSS: 0x[[BAR_T1]]: DW_TAG_structure_type
; NOCROSS: DW_AT_name {{.*}} "t1"
; ALL: DW_TAG_subprogram
; ALL: DW_AT_name {{.*}} "bar"
; DWO: DW_TAG_formal_parameter
; DWO: DW_AT_name {{.*}} "t"
; CROSS: DW_AT_type [DW_FORM_ref_addr] (0x00000000[[T1]]
; NOCROSS: DW_AT_type [DW_FORM_ref4] {{.*}}{0x[[BAR_T1]]}
; ALL: DW_TAG_inlined_subroutine
; INFO: DW_AT_abstract_origin [DW_FORM_ref_addr] (0x00000000[[F1]]
; NOCROSS: DW_AT_abstract_origin [DW_FORM_ref4] {{.*}}{0x[[BAR_F1]]}
; DWO: DW_TAG_formal_parameter
; CROSS: DW_AT_abstract_origin [DW_FORM_ref_addr] (0x00000000[[F1T]]
; NOCROSS: DW_AT_abstract_origin [DW_FORM_ref4] {{.*}}{0x[[BAR_F1T]]
%struct.t1 = type { i32 }
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare void @_Z1fv() #2
; Function Attrs: noinline uwtable
define void @_Z3foo2t1(i32 %t.coerce) #3 !dbg !20 {
entry:
%t.i = alloca %struct.t1, align 4
call void @llvm.dbg.declare(metadata %struct.t1* %t.i, metadata !15, metadata !16), !dbg !21
%t = alloca %struct.t1, align 4
%agg.tmp = alloca %struct.t1, align 4
%coerce.dive = getelementptr inbounds %struct.t1, %struct.t1* %t, i32 0, i32 0
store i32 %t.coerce, i32* %coerce.dive, align 4
call void @llvm.dbg.declare(metadata %struct.t1* %t, metadata !23, metadata !16), !dbg !24
%0 = bitcast %struct.t1* %agg.tmp to i8*, !dbg !25
%1 = bitcast %struct.t1* %t to i8*, !dbg !25
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %0, i8* align 4 %1, i64 4, i1 false), !dbg !25
%coerce.dive1 = getelementptr inbounds %struct.t1, %struct.t1* %agg.tmp, i32 0, i32 0, !dbg !26
%2 = load i32, i32* %coerce.dive1, align 4, !dbg !26
%coerce.dive.i = getelementptr inbounds %struct.t1, %struct.t1* %t.i, i32 0, i32 0
store i32 %2, i32* %coerce.dive.i, align 4
call void @_Z1fv(), !dbg !27
ret void, !dbg !28
}
; Function Attrs: argmemonly nounwind
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1) #4
; Function Attrs: noinline uwtable
define void @_Z3bar2t1(i32 %t.coerce) #3 !dbg !29 {
entry:
%t.i = alloca %struct.t1, align 4
call void @llvm.dbg.declare(metadata %struct.t1* %t.i, metadata !15, metadata !16), !dbg !30
%t = alloca %struct.t1, align 4
%agg.tmp = alloca %struct.t1, align 4
%coerce.dive = getelementptr inbounds %struct.t1, %struct.t1* %t, i32 0, i32 0
store i32 %t.coerce, i32* %coerce.dive, align 4
call void @llvm.dbg.declare(metadata %struct.t1* %t, metadata !32, metadata !16), !dbg !33
%0 = bitcast %struct.t1* %agg.tmp to i8*, !dbg !34
%1 = bitcast %struct.t1* %t to i8*, !dbg !34
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %0, i8* align 4 %1, i64 4, i1 false), !dbg !34
%coerce.dive1 = getelementptr inbounds %struct.t1, %struct.t1* %agg.tmp, i32 0, i32 0, !dbg !35
%2 = load i32, i32* %coerce.dive1, align 4, !dbg !35
%coerce.dive.i = getelementptr inbounds %struct.t1, %struct.t1* %t.i, i32 0, i32 0
store i32 %2, i32* %coerce.dive.i, align 4
call void @_Z1fv(), !dbg !36
ret void, !dbg !37
}
!llvm.dbg.cu = !{!0, !3}
!llvm.ident = !{!5, !5}
!llvm.module.flags = !{!6, !7}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 5.0.0 (trunk 302809) (llvm/trunk 302815)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: true)
!1 = !DIFile(filename: "foo.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch")
!2 = !{}
!3 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !4, producer: "clang version 5.0.0 (trunk 302809) (llvm/trunk 302815)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: true)
!4 = !DIFile(filename: "bar.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch")
!5 = !{!"clang version 5.0.0 (trunk 302809) (llvm/trunk 302815)"}
!6 = !{i32 2, !"Dwarf Version", i32 4}
!7 = !{i32 2, !"Debug Info Version", i32 3}
!8 = distinct !DISubprogram(name: "f1", linkageName: "_Z2f12t1", scope: !1, file: !1, line: 3, type: !9, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!9 = !DISubroutineType(types: !10)
!10 = !{null, !11}
!11 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "t1", file: !1, line: 1, size: 32, elements: !12, identifier: "_ZTS2t1")
!12 = !{!13}
!13 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !11, file: !1, line: 1, baseType: !14, size: 32)
!14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!15 = !DILocalVariable(name: "t", arg: 1, scope: !8, file: !1, line: 3, type: !11)
!16 = !DIExpression()
!17 = !DILocation(line: 3, column: 43, scope: !8)
!18 = !DILocation(line: 4, column: 3, scope: !8)
!19 = !DILocation(line: 5, column: 1, scope: !8)
!20 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foo2t1", scope: !1, file: !1, line: 6, type: !9, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!21 = !DILocation(line: 3, column: 43, scope: !8, inlinedAt: !22)
!22 = distinct !DILocation(line: 7, column: 3, scope: !20)
!23 = !DILocalVariable(name: "t", arg: 1, scope: !20, file: !1, line: 6, type: !11)
!24 = !DILocation(line: 6, column: 13, scope: !20)
!25 = !DILocation(line: 7, column: 6, scope: !20)
!26 = !DILocation(line: 7, column: 3, scope: !20)
!27 = !DILocation(line: 4, column: 3, scope: !8, inlinedAt: !22)
!28 = !DILocation(line: 8, column: 1, scope: !20)
!29 = distinct !DISubprogram(name: "bar", linkageName: "_Z3bar2t1", scope: !4, file: !4, line: 3, type: !9, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !3, retainedNodes: !2)
!30 = !DILocation(line: 3, column: 43, scope: !8, inlinedAt: !31)
!31 = distinct !DILocation(line: 4, column: 3, scope: !29)
!32 = !DILocalVariable(name: "t", arg: 1, scope: !29, file: !4, line: 3, type: !11)
!33 = !DILocation(line: 3, column: 13, scope: !29)
!34 = !DILocation(line: 4, column: 6, scope: !29)
!35 = !DILocation(line: 4, column: 3, scope: !29)
!36 = !DILocation(line: 4, column: 3, scope: !8, inlinedAt: !31)
!37 = !DILocation(line: 5, column: 1, scope: !29)
Reference in New Issue View Git Blame Copy Permalink