[PATCH] D30834: [x86] these aren't the undefs you're looking for (PR32176)

[Sanjay Patel via Phabricator via cfe-commits]

spatel created this revision.
Herald added a subscriber: mcrosier.

x86 has undef SSE/AVX intrinsics that should represent a bogus register operand. This is not the same as LLVM's undef value which can take on multiple bit patterns.

There are better solutions / follow-ups to this discussed here:
https://bugs.llvm.org/show_bug.cgi?id=32176
...but this should prevent miscompiles with a one-line code change.


https://reviews.llvm.org/D30834

Files:
  lib/CodeGen/CGBuiltin.cpp
  test/CodeGen/avx-builtins.c
  test/CodeGen/avx2-builtins.c
  test/CodeGen/avx512bw-builtins.c
  test/CodeGen/avx512dq-builtins.c
  test/CodeGen/avx512f-builtins.c
  test/CodeGen/avx512vl-builtins.c
  test/CodeGen/avx512vldq-builtins.c
  test/CodeGen/sse-builtins.c
  test/CodeGen/sse2-builtins.c

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