354944d675
Finish making LLVM's implementation of `DW_LNCT_LLVM_source` conform to the final accepted version of `DW_LNCT_source` from https://dwarfstd.org/issues/180201.1.html This is effectively a continuation of a few commits which have moved in this direction already, including: * c9cb4fc761cd7 [DebugInfo] Store optional DIFile::Source as pointer * 87e22bdd2bd6d Allow for mixing source/no-source DIFiles in one CU This patch: * Teaches LLParser that there is a distinction between an empty and an absent "source:" field on DIFile. * Makes printing the "source:" field in AsmWriter conditional on it being present, instead of being conditional on it being non-empty. * Teaches MC to map an empty-but-present source field to "\n" (which is ambiguous, making the source strings "" and "\n" indistinguishable, but that's what the DWARF issue specifies). Add a test for round-tripping an empty source field through assembler/bitcode. Extend the test for the actual DWARF generation so it covers all of the cases (absent, present-but-empty, present-and-ambiguously-single-newline, present).
13 lines
481 B
LLVM
13 lines
481 B
LLVM
; RUN: llvm-as < %s | llvm-dis | llvm-as | llvm-dis | FileCheck %s
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; RUN: verify-uselistorder
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; CHECK: !DIFile({{.*}}, source: "")
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3}
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!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, emissionKind: FullDebug)
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!1 = !DIFile(filename: "-", directory: "/", checksumkind: CSK_MD5, checksum: "d41d8cd98f00b204e9800998ecf8427e", source: "")
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!2 = !{i32 7, !"Dwarf Version", i32 5}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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