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[DebugInfo] Add tests that we emit .eh_frame instead of .debug_frame

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Add tests which can catch the issue in 0ce723cb228bc1d1a0f5718f3862fb836145a333
(If any function needs CFISection::EH, the module should use CFISection::EH).

Reviewed By: echristo

Differential Revision: https://reviews.llvm.org/D101339
This commit is contained in:
Fangrui Song 2021-04-29 09:35:48 -07:00
parent 479a2a2021
commit d7be2f3eb3
2 changed files with 96 additions and 22 deletions
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96
test/DebugInfo/X86/cfi_sections.ll Normal file
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@ -0,0 +1,96 @@
; RUN: split-file %s %t
; RUN: llc < %t/1.ll -mtriple=x86_64 | FileCheck %s --check-prefix=DEBUG_FRAME
; RUN: llc < %t/1.ll -mtriple=x86_64 -force-dwarf-frame-section | FileCheck %s --check-prefix=DEBUG_FRAME
; RUN: llc < %t/2.ll -mtriple=x86_64 | FileCheck %s --check-prefix=EH_FRAME
; RUN: llc < %t/2.ll -mtriple=x86_64 -force-dwarf-frame-section | FileCheck %s --check-prefix=BOTH
; RUN: llc < %t/3.ll -mtriple=x86_64 | FileCheck %s --check-prefix=EH_FRAME
; RUN: llc < %t/3.ll -mtriple=x86_64 -force-dwarf-frame-section | FileCheck %s --check-prefix=BOTH
; EH_FRAME-NOT: .cfi_sections
; DEBUG_FRAME: .cfi_sections .debug_frame{{$}}
; BOTH: .cfi_sections .eh_frame, .debug_frame{{$}}
;--- 1.ll
;; No function has uwtable/personality or throws && f needs debug info -> emit .debug_frame
define void @f() nounwind !dbg !6 {
entry:
ret void
}
define void @g() nounwind {
entry:
ret void
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 13.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "a.c", directory: "/tmp")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 5}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !7, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!7 = !DISubroutineType(types: !8)
!8 = !{null}
!9 = !DILocation(line: 1, column: 15, scope: !6)
;--- 2.ll
;; g has uwtable and thus needs .eh_frame
define void @f() nounwind !dbg !6 {
entry:
ret void
}
define void @g() nounwind uwtable !dbg !10 {
entry:
ret void
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 13.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "a.c", directory: "/tmp")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 5}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !7, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!7 = !DISubroutineType(types: !8)
!8 = !{null}
!9 = !DILocation(line: 1, column: 15, scope: !6)
!10 = distinct !DISubprogram(name: "g", scope: !1, file: !1, line: 2, type: !7, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!11 = !DILocation(line: 2, column: 15, scope: !10)
;--- 3.ll
;; g has no nounwind, so it is treated as throwable. Emit .eh_frame.
define void @f() nounwind !dbg !6 {
entry:
ret void
}
define void @g() !dbg !10 {
entry:
ret void
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 13.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "a.c", directory: "/tmp")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 5}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !7, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!7 = !DISubroutineType(types: !8)
!8 = !{null}
!9 = !DILocation(line: 1, column: 15, scope: !6)
!10 = distinct !DISubprogram(name: "g", scope: !1, file: !1, line: 2, type: !7, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!11 = !DILocation(line: 2, column: 15, scope: !10)

22
test/DebugInfo/X86/debug_frame.ll
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@ -1,22 +0,0 @@
; RUN: llc %s -mtriple=i686-pc-linux-gnu -o - | FileCheck %s
; Test that we produce a .debug_frame, not an .eh_frame
; CHECK: .cfi_sections .debug_frame
define void @f() nounwind !dbg !0 {
entry:
ret void
}
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!7}
!5 = !{!0}
!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)
!1 = !DIFile(filename: "/home/espindola/llvm/test.c", directory: "/home/espindola/llvm/build")
!2 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.0 ()", isOptimized: true, emissionKind: FullDebug, file: !6, enums: !{}, retainedTypes: !{})
!3 = !DISubroutineType(types: !4)
!4 = !{null}
!6 = !DIFile(filename: "/home/espindola/llvm/test.c", directory: "/home/espindola/llvm/build")
!7 = !{i32 1, !"Debug Info Version", i32 3}