[InstCombine] simplify fneg+fadd folds; NFC

Description

[InstCombine] simplify fneg+fadd folds; NFC

Two cleanups:

  1. As noted in D45453, we had tests that don't need FMF that were misplaced in the 'fast-math.ll' test file.
  2. This removes the final uses of dyn_castFNegVal, so that can be deleted. We use 'match' now.

Details

Committed
spatelApr 16 2018, 7:13 AM
Parents
rL330125: Put all the tidbits about the current state of relicensing into one place so it…
Branches
Unknown
Tags
Unknown