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llvm-project/llvm/test/CodeGen/X86/label-annotation.ll

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Add llvm.codeview.annotation to implement MSVC __annotation Summary: This intrinsic represents a label with a list of associated metadata strings. It is modelled as reading and writing inaccessible memory so that it won't be removed as dead code. I think the intention is that the annotation strings should appear at most once in the debug info, so I marked it noduplicate. We are allowed to inline code with annotations as long as we strip the annotation, but that can be done later. Reviewers: majnemer Subscribers: eraman, llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D36904 llvm-svn: 312569
2017-09-06 04:14:58 +08:00
; RUN: llc < %s | FileCheck %s
; FIXME: fastisel screws up the order here.
; RUNX: llc -O0 < %s | FileCheck %s
; Source to regenerate:
; $ clang --target=x86_64-windows-msvc -S annotation.c -g -gcodeview -o t.ll \
; -emit-llvm -O1 -Xclang -disable-llvm-passes -fms-extensions
; void g(void);
; void f(void) {
; g();
; __annotation(L"a1", L"a2");
; g();
; }
; ModuleID = 'annotation.c'
source_filename = "annotation.c"
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc19.0.24215"
; Function Attrs: nounwind uwtable
define void @f() #0 !dbg !8 {
entry:
call void @g(), !dbg !11
call void @llvm.codeview.annotation(metadata !12), !dbg !13
call void @g(), !dbg !14
ret void, !dbg !15
}
; CHECK-LABEL: f: # @f
; CHECK: callq g
; CHECK: .Lannotation0:
; CHECK: callq g
; CHECK: retq
; CHECK-LABEL: .short 4423 # Record kind: S_GPROC32_ID
; CHECK: .short 4121 # Record kind: S_ANNOTATION
; CHECK-NEXT: .secrel32 .Lannotation0
; CHECK-NEXT: .secidx .Lannotation0
; CHECK-NEXT: .short 2
; CHECK-NEXT: .asciz "a1"
; CHECK-NEXT: .asciz "a2"
; CHECK-LABEL: .short 4431 # Record kind: S_PROC_ID_END
declare void @g() #1
; Function Attrs: nounwind
declare void @llvm.codeview.annotation(metadata) #2
attributes #0 = { nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "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" "no-signed-zeros-fp-math"="false" "no-trapping-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 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-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 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!llvm.ident = !{!7}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "annotation.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "51164221112d8a5baa55a995027e4ba5")
!2 = !{}
!3 = !{i32 2, !"CodeView", i32 1}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 2}
!6 = !{i32 7, !"PIC Level", i32 2}
!7 = !{!"clang version 6.0.0 "}
[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
!8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
Add llvm.codeview.annotation to implement MSVC __annotation Summary: This intrinsic represents a label with a list of associated metadata strings. It is modelled as reading and writing inaccessible memory so that it won't be removed as dead code. I think the intention is that the annotation strings should appear at most once in the debug info, so I marked it noduplicate. We are allowed to inline code with annotations as long as we strip the annotation, but that can be done later. Reviewers: majnemer Subscribers: eraman, llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D36904 llvm-svn: 312569
2017-09-06 04:14:58 +08:00
!9 = !DISubroutineType(types: !10)
!10 = !{null}
!11 = !DILocation(line: 3, column: 3, scope: !8)
!12 = !{!"a1", !"a2"}
!13 = !DILocation(line: 4, column: 3, scope: !8)
!14 = !DILocation(line: 5, column: 3, scope: !8)
!15 = !DILocation(line: 6, column: 1, scope: !8)