[PATCH] D48135: [DWARFv5] Tolerate files not all having an MD5 checksum.

[Paul Robinson via Phabricator via llvm-commits]

probinson created this revision.
probinson added reviewers: dblaikie, aprantl.
probinson added a project: debug-info.
Herald added subscribers: llvm-commits, JDevlieghere, hiraditya, arichardson, emaste.
Herald added a reviewer: espindola.

In some cases, for example when compiling a preprocessed file, the
front-end is not able to provide an MD5 checksum for all files. When
that happens, omit the MD5 checksums from the final DWARF, because
DWARF doesn't have a way to indicate that some but not all files have
a checksum.

When assembling a .s file, and some but not all .file directives
provide an MD5 checksum, issue a warning and don't emit MD5 into the
DWARF.

Fixes PR37623.


Repository:
  rL LLVM

https://reviews.llvm.org/D48135

Files:
  llvm/include/llvm/MC/MCContext.h
  llvm/include/llvm/MC/MCDwarf.h
  llvm/lib/MC/MCAsmStreamer.cpp
  llvm/lib/MC/MCDwarf.cpp
  llvm/lib/MC/MCParser/AsmParser.cpp
  llvm/test/CodeGen/Generic/dwarf-md5.ll
  llvm/test/CodeGen/Generic/dwarf-source.ll
  llvm/test/MC/ELF/debug-md5-err.s
  llvm/test/MC/ELF/debug-mixed-md5.ll

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