[PATCH] D32680: [X86] Apply the new instruction's register classes constraints on the operands of the replaced instruction when memory folding

[Ayman Musa via Phabricator via llvm-commits]

aymanmus added a comment.

@craig.topper, i encountered this issue by coincidence but could not find a test case which fails without this. all the folded instructions right now have the same register classes constrains for both register and memory forms.
But as we entirely replace the instruction I saw that this change should be added even though it doesn't effect anything right now. Maybe it will be needed in the future.


https://reviews.llvm.org/D32680