[PATCH] D36711: [X86] Combining CMOVs with [ANY, SIGN, ZERO]_EXTEND for cases where CMOV has constant arguments

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

I believe X86 lowers all selects of any type to X86ISD::CMOV. If the target supports CMOV for a type, isel will emit a real CMOV instruction. If the target doesn't support CMOV or the type isn't supported by CMOV we emit a CMOV peusdo instruction which gets custom inserted to control flow via EmitLoweredSelect.


https://reviews.llvm.org/D36711