[PATCH] D36414: [X86][X87] Ensure x87 instructions are tagged as altering the FPSW reg

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

In https://reviews.llvm.org/D36414#834085, @craig.topper wrote:

> Weirdly, Intel's documentation says that FNOP puts the FPU flags in an undefined state. AMD says they are unmodified. I'll see if I can find someone internally to determine if that's a mistake in Intel's documentation.


@craig.topper Did you get an answer to this? The patch shouldn't introduce any new bugs to FNOP.


Repository:
  rL LLVM

https://reviews.llvm.org/D36414