[InstSimplify] (X * Y) / Y --> X for relaxed floating-point ops

This is the FP counterpart that was mentioned in PR35709:
https://bugs.llvm.org/show_bug.cgi?id=35709

Differential Revision: https://reviews.llvm.org/D42385


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323716 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed