[PATCH] D72675: Fix -ffast-math/-ffp-contract interaction

[Warren Ristow via Phabricator via cfe-commits]

wristow added a comment.

> One commit for the clang changes should be ok; it's a very small diff. But I'm still not sure if the driver change induces frontend diffs that we should make visible via tests.

The only thing I can think of is that it changes whether/when `__FAST_MATH__` is defined.  But that'll be indirectly tested, via the updated tests in "Driver/fast-math.c", which will verify that "-ffast-math" is passed appropriately (and the `__FAST_MATH__` dependency on "-ffast-math" is already tested in "Preprocessor/predefined-macros.c").

In addition to adding the second pair of driver tests you suggested for `-ffp-contract=on`, I'll also add another pair for `-ffp-contract=fast` to verify that "-ffast-math" is passed in that case (no change in behavior for that pair, but just confirming it continues to work correctly).


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D72675/new/

https://reviews.llvm.org/D72675