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llvm-project/llvm/test/DebugInfo/COFF/comdat.ll

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[codeview] Use comdats for debug info describing comdat functions Summary: This allows the linker to discard unused symbol information for comdat functions that were discarded during the link. Before this change, searching for the name of an inline function in the debugger would return multiple results, one per symbol subsection in the object file. After this change, there is only one result, the result for the function chosen by the linker. Reviewers: zturner, majnemer Subscribers: aaboud, amccarth, llvm-commits Differential Revision: http://reviews.llvm.org/D20642 llvm-svn: 270792
2016-05-26 07:16:12 +08:00
; RUN: llc < %s | FileCheck %s
; Verify that we get *two* .debug$S sections, the main one describing bar and
; main, and one for f and fin$f, which is comdat with f.
; Start in the main symbol section describing bar and main.
; CHECK: .section .debug$S,"dr"{{$}}
; CHECK: .long 4 # Debug section magic
; CHECK: # Symbol subsection for bar
; CHECK-NOT: Debug section magic
; CHECK: # Symbol subsection for main
; Emit symbol info for f and its associated code in a separate associated
; section.
; CHECK: .section .debug$S,"dr",associative,f{{$}}
; CHECK: .long 4 # Debug section magic
; CHECK: # Symbol subsection for f
; CHECK-NOT: Debug section magic
; CHECK: # Symbol subsection for ?fin$0@0@f@@
; Switch back to the main section for the shared file checksum table and string
; table.
; CHECK: .section .debug$S,"dr"{{$}}
; CHECK-NOT: Debug section magic
; CHECK: .cv_filechecksums
; CHECK: .cv_stringtable
; CHECK-NOT: .section .debug$S,
; Generated with this C++ source:
; void foo();
; void bar();
; extern volatile int x;
; inline void __declspec(noinline) f(bool c) {
; x++;
; if (c) {
; __try {
; foo();
; } __finally {
; x++;
; }
; } else
; bar();
; x++;
; }
; void bar() {
; x++;
; }
; int main() {
; f(true);
; }
; ModuleID = 't.cpp'
source_filename = "t.cpp"
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc19.0.23918"
$f = comdat any
@x = external global i32, align 4
; Function Attrs: norecurse nounwind uwtable
define void @bar() #0 !dbg !7 {
entry:
%0 = load volatile i32, i32* @x, align 4, !dbg !10, !tbaa !11
%inc = add nsw i32 %0, 1, !dbg !10
store volatile i32 %inc, i32* @x, align 4, !dbg !10, !tbaa !11
ret void, !dbg !15
}
; Function Attrs: nounwind uwtable
define i32 @main() #1 !dbg !16 {
entry:
tail call void @f(i32 1), !dbg !20
ret i32 0, !dbg !21
}
; Function Attrs: inlinehint noinline nounwind uwtable
define linkonce_odr void @f(i32 %c) #2 comdat personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) !dbg !22 {
entry:
Remove the obsolete offset parameter from @llvm.dbg.value There is no situation where this rarely-used argument cannot be substituted with a DIExpression and removing it allows us to simplify the DWARF backend. Note that this patch does not yet remove any of the newly dead code. rdar://problem/33580047 Differential Revision: https://reviews.llvm.org/D35951 llvm-svn: 309426
2017-07-29 04:21:02 +08:00
tail call void @llvm.dbg.value(metadata i32 %c, metadata !26, metadata !27), !dbg !28
[codeview] Use comdats for debug info describing comdat functions Summary: This allows the linker to discard unused symbol information for comdat functions that were discarded during the link. Before this change, searching for the name of an inline function in the debugger would return multiple results, one per symbol subsection in the object file. After this change, there is only one result, the result for the function chosen by the linker. Reviewers: zturner, majnemer Subscribers: aaboud, amccarth, llvm-commits Differential Revision: http://reviews.llvm.org/D20642 llvm-svn: 270792
2016-05-26 07:16:12 +08:00
%0 = load volatile i32, i32* @x, align 4, !dbg !29, !tbaa !11
%inc = add nsw i32 %0, 1, !dbg !29
store volatile i32 %inc, i32* @x, align 4, !dbg !29, !tbaa !11
%tobool = icmp eq i32 %c, 0, !dbg !30
br i1 %tobool, label %if.else, label %if.then, !dbg !32
if.then: ; preds = %entry
invoke void bitcast (void (...)* @foo to void ()*)() #6
to label %invoke.cont unwind label %ehcleanup, !dbg !33
invoke.cont: ; preds = %if.then
tail call fastcc void @"\01?fin$0@0@f@@"() #7, !dbg !36
br label %if.end, !dbg !37
ehcleanup: ; preds = %if.then
%1 = cleanuppad within none [], !dbg !36
tail call fastcc void @"\01?fin$0@0@f@@"() #7 [ "funclet"(token %1) ], !dbg !36
cleanupret from %1 unwind to caller, !dbg !36
if.else: ; preds = %entry
tail call void @bar(), !dbg !38
br label %if.end
if.end: ; preds = %if.else, %invoke.cont
%2 = load volatile i32, i32* @x, align 4, !dbg !39, !tbaa !11
%inc1 = add nsw i32 %2, 1, !dbg !39
store volatile i32 %inc1, i32* @x, align 4, !dbg !39, !tbaa !11
ret void, !dbg !40
}
; Function Attrs: nounwind
define internal fastcc void @"\01?fin$0@0@f@@"() unnamed_addr #3 comdat($f) !dbg !41 {
entry:
Remove the obsolete offset parameter from @llvm.dbg.value There is no situation where this rarely-used argument cannot be substituted with a DIExpression and removing it allows us to simplify the DWARF backend. Note that this patch does not yet remove any of the newly dead code. rdar://problem/33580047 Differential Revision: https://reviews.llvm.org/D35951 llvm-svn: 309426
2017-07-29 04:21:02 +08:00
tail call void @llvm.dbg.value(metadata i8* null, metadata !44, metadata !27), !dbg !48
tail call void @llvm.dbg.value(metadata i8 0, metadata !46, metadata !27), !dbg !48
[codeview] Use comdats for debug info describing comdat functions Summary: This allows the linker to discard unused symbol information for comdat functions that were discarded during the link. Before this change, searching for the name of an inline function in the debugger would return multiple results, one per symbol subsection in the object file. After this change, there is only one result, the result for the function chosen by the linker. Reviewers: zturner, majnemer Subscribers: aaboud, amccarth, llvm-commits Differential Revision: http://reviews.llvm.org/D20642 llvm-svn: 270792
2016-05-26 07:16:12 +08:00
%0 = load volatile i32, i32* @x, align 4, !dbg !49, !tbaa !11
%inc = add nsw i32 %0, 1, !dbg !49
store volatile i32 %inc, i32* @x, align 4, !dbg !49, !tbaa !11
ret void, !dbg !51
}
declare void @foo(...) #4
declare i32 @__C_specific_handler(...)
; Function Attrs: nounwind readnone
Remove the obsolete offset parameter from @llvm.dbg.value There is no situation where this rarely-used argument cannot be substituted with a DIExpression and removing it allows us to simplify the DWARF backend. Note that this patch does not yet remove any of the newly dead code. rdar://problem/33580047 Differential Revision: https://reviews.llvm.org/D35951 llvm-svn: 309426
2017-07-29 04:21:02 +08:00
declare void @llvm.dbg.value(metadata, metadata, metadata) #5
[codeview] Use comdats for debug info describing comdat functions Summary: This allows the linker to discard unused symbol information for comdat functions that were discarded during the link. Before this change, searching for the name of an inline function in the debugger would return multiple results, one per symbol subsection in the object file. After this change, there is only one result, the result for the function chosen by the linker. Reviewers: zturner, majnemer Subscribers: aaboud, amccarth, llvm-commits Differential Revision: http://reviews.llvm.org/D20642 llvm-svn: 270792
2016-05-26 07:16:12 +08:00
attributes #0 = { norecurse nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { inlinehint noinline nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #3 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #4 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #5 = { nounwind readnone }
attributes #6 = { noinline }
attributes #7 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "t.cpp", directory: "D:\5Csrc\5Cllvm\5Cbuild")
!2 = !{}
!3 = !{i32 2, !"CodeView", i32 1}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"PIC Level", i32 2}
!6 = !{!"clang version 3.9.0 "}
[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 10:40:45 +08:00
!7 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 19, type: !8, isLocal: false, isDefinition: true, scopeLine: 19, isOptimized: true, unit: !0, retainedNodes: !2)
[codeview] Use comdats for debug info describing comdat functions Summary: This allows the linker to discard unused symbol information for comdat functions that were discarded during the link. Before this change, searching for the name of an inline function in the debugger would return multiple results, one per symbol subsection in the object file. After this change, there is only one result, the result for the function chosen by the linker. Reviewers: zturner, majnemer Subscribers: aaboud, amccarth, llvm-commits Differential Revision: http://reviews.llvm.org/D20642 llvm-svn: 270792
2016-05-26 07:16:12 +08:00
!8 = !DISubroutineType(types: !9)
!9 = !{null}
!10 = !DILocation(line: 20, column: 4, scope: !7)
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !13, i64 0}
!13 = !{!"omnipotent char", !14, i64 0}
!14 = !{!"Simple C/C++ TBAA"}
!15 = !DILocation(line: 21, column: 1, scope: !7)
[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 10:40:45 +08:00
!16 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 22, type: !17, isLocal: false, isDefinition: true, scopeLine: 22, isOptimized: true, unit: !0, retainedNodes: !2)
[codeview] Use comdats for debug info describing comdat functions Summary: This allows the linker to discard unused symbol information for comdat functions that were discarded during the link. Before this change, searching for the name of an inline function in the debugger would return multiple results, one per symbol subsection in the object file. After this change, there is only one result, the result for the function chosen by the linker. Reviewers: zturner, majnemer Subscribers: aaboud, amccarth, llvm-commits Differential Revision: http://reviews.llvm.org/D20642 llvm-svn: 270792
2016-05-26 07:16:12 +08:00
!17 = !DISubroutineType(types: !18)
!18 = !{!19}
!19 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!20 = !DILocation(line: 23, column: 3, scope: !16)
!21 = !DILocation(line: 24, column: 1, scope: !16)
[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 10:40:45 +08:00
!22 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 5, type: !23, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !25)
[codeview] Use comdats for debug info describing comdat functions Summary: This allows the linker to discard unused symbol information for comdat functions that were discarded during the link. Before this change, searching for the name of an inline function in the debugger would return multiple results, one per symbol subsection in the object file. After this change, there is only one result, the result for the function chosen by the linker. Reviewers: zturner, majnemer Subscribers: aaboud, amccarth, llvm-commits Differential Revision: http://reviews.llvm.org/D20642 llvm-svn: 270792
2016-05-26 07:16:12 +08:00
!23 = !DISubroutineType(types: !24)
!24 = !{null, !19}
!25 = !{!26}
!26 = !DILocalVariable(name: "c", arg: 1, scope: !22, file: !1, line: 5, type: !19)
!27 = !DIExpression()
!28 = !DILocation(line: 5, column: 40, scope: !22)
!29 = !DILocation(line: 6, column: 4, scope: !22)
!30 = !DILocation(line: 7, column: 7, scope: !31)
!31 = distinct !DILexicalBlock(scope: !22, file: !1, line: 7, column: 7)
!32 = !DILocation(line: 7, column: 7, scope: !22)
!33 = !DILocation(line: 9, column: 7, scope: !34)
!34 = distinct !DILexicalBlock(scope: !35, file: !1, line: 8, column: 11)
!35 = distinct !DILexicalBlock(scope: !31, file: !1, line: 7, column: 10)
!36 = !DILocation(line: 10, column: 5, scope: !34)
!37 = !DILocation(line: 13, column: 3, scope: !35)
!38 = !DILocation(line: 14, column: 5, scope: !31)
!39 = !DILocation(line: 15, column: 4, scope: !22)
!40 = !DILocation(line: 16, column: 1, scope: !22)
[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 10:40:45 +08:00
!41 = distinct !DISubprogram(linkageName: "\01?fin$0@0@f@@", scope: !1, file: !1, line: 10, type: !42, isLocal: true, isDefinition: true, scopeLine: 10, flags: DIFlagArtificial, isOptimized: true, unit: !0, retainedNodes: !43)
[codeview] Use comdats for debug info describing comdat functions Summary: This allows the linker to discard unused symbol information for comdat functions that were discarded during the link. Before this change, searching for the name of an inline function in the debugger would return multiple results, one per symbol subsection in the object file. After this change, there is only one result, the result for the function chosen by the linker. Reviewers: zturner, majnemer Subscribers: aaboud, amccarth, llvm-commits Differential Revision: http://reviews.llvm.org/D20642 llvm-svn: 270792
2016-05-26 07:16:12 +08:00
!42 = !DISubroutineType(types: !2)
!43 = !{!44, !46}
!44 = !DILocalVariable(name: "frame_pointer", arg: 2, scope: !41, type: !45, flags: DIFlagArtificial)
!45 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64, align: 64)
!46 = !DILocalVariable(name: "abnormal_termination", arg: 1, scope: !41, type: !47, flags: DIFlagArtificial | DIFlagObjectPointer)
!47 = !DIBasicType(name: "unsigned char", size: 8, align: 8, encoding: DW_ATE_unsigned_char)
!48 = !DILocation(line: 0, scope: !41)
!49 = !DILocation(line: 11, column: 8, scope: !50)
!50 = distinct !DILexicalBlock(scope: !41, file: !1, line: 10, column: 17)
!51 = !DILocation(line: 12, column: 5, scope: !41)