abe6ecd7e5
Consider only targets where `MCAsmInfo::ExceptionsType == ExceptionHandling::None` and that support CFI (when `MCAsmInfo::UsesCFIForDebug` is set to true): currently, only AMDGPU. This patch enables the emission of CFI information in the .eh_frame section when the uwtable attribute is present on a function. Before, we could generate CFI information for debugging puproses only. This patch prepares AMDGPU to support collecting GPU stack traces in the future. I did a first implementation (https://reviews.llvm.org/D139024) but at the time I had not realized that no other platform used `UsesCFIForDebug`. Reviewed By: scott.linder Differential Revision: https://reviews.llvm.org/D151806
30 lines
1.3 KiB
LLVM
30 lines
1.3 KiB
LLVM
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -o - < %s | FileCheck %s --check-prefix=EH
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; RUN: llc -mtriple=amdgcn-amd-amdhsa --force-dwarf-frame-section -o - < %s | FileCheck %s --check-prefix=BOTH
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; RUN: llc -mtriple=amdgcn-amd-amdhsa --exception-model=dwarf -o - < %s | FileCheck %s --check-prefix=EH
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; RUN: llc -mtriple=amdgcn-amd-amdhsa --force-dwarf-frame-section --exception-model=dwarf -o - < %s | FileCheck %s --check-prefix=BOTH
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; EH: f:
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; EH-NOT: .cfi_sections
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; EH: .cfi_startproc
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; BOTH: f:
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; BOTH: .cfi_sections .eh_frame, .debug_frame
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; BOTH: .cfi_startproc
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define void @f() nounwind uwtable !dbg !0 {
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entry:
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ret void
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}
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!7}
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!5 = !{!0}
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!0 = distinct !DISubprogram(name: "f", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, scopeLine: 1, file: !6, scope: !1, type: !3)
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!1 = !DIFile(filename: "/home/llvm/test.c", directory: "/home/llvm/build")
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang", isOptimized: true, emissionKind: FullDebug, file: !6, enums: !{}, retainedTypes: !{})
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!3 = !DISubroutineType(types: !4)
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!4 = !{null}
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!6 = !DIFile(filename: "/home/llvm/test.c", directory: "/home/llvm/build")
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!7 = !{i32 1, !"Debug Info Version", i32 3}
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