[PATCH] D63473: Support -fclang-abi-compat=8.0 to keep old ABI behavior

[Saleem Abdulrasool via Phabricator via cfe-commits]

compnerd added a comment.

Could you please add a test to ensure that Darwin defaults to the old behaviour?



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Comment at: include/clang/Basic/LangOptions.h:142
+    /// Attempt to be ABI-compatible with code generated by Clang 8.0.x
+    /// (https://reviews.llvm.org/D59744). This causes __m64 to be passed in
+    /// MMX register instead of integer register.
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Referencing the SVN revision is better IMO as the infrastructure can change, but, the reference to the commit is useful as that can be mapped.


Repository:
  rC Clang

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D63473/new/

https://reviews.llvm.org/D63473