Summary:
This patch addresses some weird assembly sequences we were seeing during
comparing floats. In particular, comparing a float to itself tells you whether
it is NaN or not, which we were doing correctly, but with an extra unneeded
`and` instruction.
This patch specialises the existing patterns to remove the `and` instructions
when both their operands are the same.
Reviewed By: luismarques, asb
Differential Revision: https://reviews.llvm.org/D78908
Summary:
I worked on adding some SelectionDag patterns to address code generated by these
examples, which came out of some differential testing against GCC. The pattern
additions will be in a follow-up patch.
Reviewers: luismarques, asb
Reviewed By: luismarques, asb
Differential Revision: https://reviews.llvm.org/D78907
Sam Elliott