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Add debug location verification for !llvm.loop attachments.
This patch teaches the Verifier how to detect broken !llvm.loop attachments as discussed in https://reviews.llvm.org/D60831. This allows LLVM to warn and strip out the broken debug info before attempting an LTO compilation with input generated by LLVM predating https://reviews.llvm.org/rL361149. rdar://problem/51631158 Differential Revision: https://reviews.llvm.org/D63499 llvm-svn: 363725
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Original file line number | Diff line number | Diff line change |
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; RUN: llvm-as -disable-output < %s -o /dev/null 2>&1 | FileCheck %s | ||
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define i32 @foo() !dbg !4 { | ||
entry: | ||
ret i32 0, !dbg !6 | ||
} | ||
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define i32 @bar() !dbg !5 { | ||
entry: | ||
; CHECK: !dbg attachment points at wrong subprogram for function | ||
ret i32 0, !dbg !10, !llvm.loop !9 | ||
} | ||
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; CHECK: warning: ignoring invalid debug info | ||
!llvm.dbg.cu = !{!0} | ||
!llvm.module.flags = !{!7, !8} | ||
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2, imports: !2) | ||
!1 = !DIFile(filename: "dwarf-test.c", directory: "test") | ||
!2 = !{} | ||
!4 = distinct !DISubprogram(name: "foo", scope: !0, isDefinition: true, unit: !0) | ||
!5 = distinct !DISubprogram(name: "bar", scope: !0, isDefinition: true, unit: !0) | ||
!6 = !DILocation(line: 7, scope: !4) | ||
!7 = !{i32 2, !"Dwarf Version", i32 3} | ||
!8 = !{i32 1, !"Debug Info Version", i32 3} | ||
!9 = !{!9, !10, !11} | ||
!10 = !DILocation(line: 1, scope: !5) | ||
!11 = !DILocation(line: 1, scope: !4) |