jfb added a comment.

In D59287#1427654 <https://reviews.llvm.org/D59287#1427654>, @craig.topper 
wrote:

> Most if not all of the test cases in test/CodeGen/X86/atomic128.ll fail with 
> a fatal error if you run it in 32-bit mode with -mattr=+cx16  Looks like the 
> backend is also bad at checking 64 bit mode.


So you're saying we're consistent, but in a bad way? It seems like an i386 
target just shouldn't be allowed to set cx16, no?


Repository:
  rC Clang

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D59287/new/

https://reviews.llvm.org/D59287



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