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https://github.com/RPCS3/llvm-mirror.git
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a2029fa58e
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
168 lines
5.8 KiB
LLVM
168 lines
5.8 KiB
LLVM
; RUN: llc -mcpu=core2 -mtriple=i686-pc-win32 -O0 < %s | FileCheck --check-prefix=X86 %s
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; RUN: llc -mcpu=core2 -mtriple=i686-pc-win32 -o - -O0 < %s | llvm-mc -triple=i686-pc-win32 -filetype=obj | llvm-readobj -s -sr -codeview | FileCheck --check-prefix=OBJ32 %s
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; RUN: llc -mcpu=core2 -mtriple=x86_64-pc-win32 -O0 < %s | FileCheck --check-prefix=X64 %s
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; RUN: llc -mcpu=core2 -mtriple=x86_64-pc-win32 -o - -O0 < %s | llvm-mc -triple=x86_64-pc-win32 -filetype=obj | llvm-readobj -s -sr -codeview | FileCheck --check-prefix=OBJ64 %s
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; This LL file was generated by running clang on the following code:
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; D:\asm.c:
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; 1 void g(void);
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; 2
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; 3 void f(void) {
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; 4 __asm align 4;
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; 5 g();
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; 6 }
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; X86-LABEL: _f:
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; X86: .cv_file 1 "D:\\asm.c"
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; X86: .cv_loc 0 1 4 0 is_stmt 0
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; X86: .cv_loc 0 1 5 0
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; X86: calll _g
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; X86: .cv_loc 0 1 6 0
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; X86: ret
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; X86: [[END_OF_F:.?Lfunc_end.*]]:
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; Line table
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; X86: .cv_linetable 0, _f, [[END_OF_F]]
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; File index to string table offset subsection
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; X86-NEXT: .cv_filechecksums
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; String table
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; X86-NEXT: .cv_stringtable
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; OBJ32: Section {
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; OBJ32: Name: .debug$S (2E 64 65 62 75 67 24 53)
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; OBJ32: Characteristics [ (0x42300040)
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; OBJ32: ]
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; OBJ32: CodeViewDebugInfo [
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; OBJ32: Subsection [
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; OBJ32-NEXT: SubSectionType: Symbols (0xF1)
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; OBJ32: {{.*}}Proc{{.*}}Sym {
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; OBJ32: CodeSize: 0x6
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; OBJ32: DisplayName: f
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; OBJ32: LinkageName: _f
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; OBJ32: }
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; OBJ32: ProcEnd {
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; OBJ32: }
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; OBJ32-NEXT: ]
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; OBJ32: FunctionLineTable [
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; OBJ32-NEXT: Name: _f
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; OBJ32-NEXT: Flags: 0x0
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; OBJ32-NEXT: CodeSize: 0x6
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; OBJ32-NEXT: FilenameSegment [
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; OBJ32-NEXT: Filename: D:\asm.c
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; FIXME: An empty __asm stmt creates an extra entry.
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; We seem to know that these offsets are the same statically during the
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; execution of endModule(). See PR18679 for the details.
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; OBJ32-NEXT: +0x0 [
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; OBJ32-NEXT: LineNumberStart: 4
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; OBJ32-NEXT: LineNumberEndDelta: 0
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; OBJ32-NEXT: IsStatement: No
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; OBJ32-NEXT: ]
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; OBJ32-NEXT: +0x0 [
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; OBJ32-NEXT: LineNumberStart: 5
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; OBJ32-NEXT: LineNumberEndDelta: 0
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; OBJ32-NEXT: IsStatement: No
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; OBJ32-NEXT: ]
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; OBJ32-NEXT: +0x5 [
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; OBJ32-NEXT: LineNumberStart: 6
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; OBJ32-NEXT: LineNumberEndDelta: 0
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; OBJ32-NEXT: IsStatement: No
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; OBJ32-NEXT: ]
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; OBJ32-NEXT: ]
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; X64-LABEL: f:
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; X64: .cv_file 1 "D:\\asm.c"
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; X64: .cv_loc 0 1 3 0 is_stmt 0
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; X64: subq $40, %rsp
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; X64: .cv_loc 0 1 4 0
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; X64: .cv_loc 0 1 5 0
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; X64: callq g
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; X64: .cv_loc 0 1 6 0
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; X64: addq $40, %rsp
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; X64-NEXT: ret
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; X64: [[END_OF_F:.?Lfunc_end.*]]:
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; Line table
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; X64: .cv_linetable 0, f, [[END_OF_F]]
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; File index to string table offset subsection
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; X64-NEXT: .cv_filechecksums
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; String table
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; X64-NEXT: .cv_stringtable
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; OBJ64: Section {
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; OBJ64: Name: .debug$S (2E 64 65 62 75 67 24 53)
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; OBJ64: Characteristics [ (0x42300040)
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; OBJ64: ]
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; OBJ64: Subsection [
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; OBJ64-NEXT: SubSectionType: Symbols (0xF1)
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; OBJ64: {{.*}}Proc{{.*}}Sym {
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; OBJ64: CodeSize: 0xE
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; OBJ64: DisplayName: f
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; OBJ64: LinkageName: f
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; OBJ64: }
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; OBJ64-NEXT: ProcEnd {
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; OBJ64: }
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; OBJ64-NEXT: ]
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; OBJ64: FunctionLineTable [
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; OBJ64-NEXT: Name: f
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; OBJ64-NEXT: Flags: 0x0
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; OBJ64-NEXT: CodeSize: 0xE
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; OBJ64-NEXT: FilenameSegment [
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; OBJ64-NEXT: Filename: D:\asm.c
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; FIXME: An empty __asm stmt creates an extra entry.
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; See PR18679 for the details.
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; OBJ64-NEXT: +0x0 [
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; OBJ64-NEXT: LineNumberStart: 3
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; OBJ64-NEXT: LineNumberEndDelta: 0
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; OBJ64-NEXT: IsStatement: No
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; OBJ64-NEXT: ]
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; OBJ64-NEXT: +0x4 [
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; OBJ64-NEXT: LineNumberStart: 4
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; OBJ64-NEXT: LineNumberEndDelta: 0
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; OBJ64-NEXT: IsStatement: No
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; OBJ64-NEXT: ]
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; OBJ64-NEXT: +0x4 [
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; OBJ64-NEXT: LineNumberStart: 5
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; OBJ64-NEXT: LineNumberEndDelta: 0
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; OBJ64-NEXT: IsStatement: No
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; OBJ64-NEXT: ]
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; OBJ64-NEXT: +0x9 [
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; OBJ64-NEXT: LineNumberStart: 6
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; OBJ64-NEXT: LineNumberEndDelta: 0
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; OBJ64-NEXT: IsStatement: No
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; OBJ64-NEXT: ]
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; OBJ64-NEXT: ]
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; OBJ64-NEXT: ]
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; Function Attrs: nounwind
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define void @f() #0 !dbg !4 {
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entry:
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call void asm sideeffect inteldialect ".align 4", "~{dirflag},~{fpsr},~{flags}"() #2, !dbg !12
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call void @g(), !dbg !13
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ret void, !dbg !14
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}
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declare void @g() #1
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attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!9, !10}
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!llvm.ident = !{!11}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
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!1 = !DIFile(filename: "<unknown>", directory: "D:\5C")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "f", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 3, file: !5, scope: !6, type: !7, retainedNodes: !2)
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!5 = !DIFile(filename: "asm.c", directory: "D:\5C")
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!6 = !DIFile(filename: "asm.c", directory: "D:C")
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!7 = !DISubroutineType(types: !8)
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!8 = !{null}
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!9 = !{i32 2, !"CodeView", i32 1}
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!10 = !{i32 1, !"Debug Info Version", i32 3}
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!11 = !{!"clang version 3.5 "}
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!12 = !DILocation(line: 4, scope: !4)
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!13 = !DILocation(line: 5, scope: !4)
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!14 = !DILocation(line: 6, scope: !4)
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