41f8b8e807
This change enables emitting CFI unwind information for debugging purpose for targets with MCAsmInfo::ExceptionsType == ExceptionHandling::None. Currently generating CFI unwind information is entangled with supporting the exceptions, even when AsmPrinter explicitly recognizes that the unwind tables are being generated as debug information. In fact, the unwind information is not generated even if we specify --force-dwarf-frame-section, unless exceptions are enabled. The LIT test llvm/test/CodeGen/AMDGPU/debug_frame.ll demonstrates this behavior. Enable this option for AMDGPU to prepare for future patches which add complete CFI support. Reviewed By: dblaikie, MaskRay Differential Revision: https://reviews.llvm.org/D78778
35 lines
1.1 KiB
LLVM
35 lines
1.1 KiB
LLVM
; RUN: llc -mcpu=gfx900 -mtriple=amdgcn-amd-amdhsa -filetype=obj -o - %s | llvm-dwarfdump -debug-frame - | FileCheck %s
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; CHECK: .debug_frame contents:
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; CHECK: 00000000 0000000c ffffffff CIE
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; CHECK-NEXT: Format: DWARF32
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; CHECK-NEXT: Version: 4
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; CHECK-NEXT: Augmentation: ""
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; CHECK-NEXT: Address size: 8
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; CHECK-NEXT: Segment desc size: 0
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; CHECK-NEXT: Code alignment factor: 4
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; CHECK-NEXT: Data alignment factor: 4
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; CHECK-NEXT: Return address column: 16
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; CHECK-EMPTY:
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; CHECK: DW_CFA_nop:
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; CHECK-EMPTY:
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; CHECK: 00000010 {{[0-9]+}} 00000000 FDE cie=00000000 pc=00000000...{{[0-9]+}}
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; CHECK-NEXT: Format: DWARF32
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; CHECK-EMPTY:
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; CHECK: .eh_frame contents:
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; CHECK-NOT: CIE
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define void @func() #0 {
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ret void
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}
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attributes #0 = { nounwind }
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!llvm.module.flags = !{!0, !1}
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!llvm.dbg.cu = !{!2}
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!0 = !{i32 7, !"Dwarf Version", i32 5}
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!1 = !{i32 2, !"Debug Info Version", i32 3}
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, emissionKind: FullDebug)
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!3 = !DIFile(filename: "file", directory: "dir")
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