Craig Topper 1e569e3b7b [RISCV] Add CMOV isel pattern for (select (setgt X, -1), Y, Z) ...

setgt X, -1 is the canonical form of setge X, 0. We can swap the
select operands and use setlt X, X0 when selecting CMOV. This
avoid materializing the -1 in a register.

2022-03-04 22:35:13 -08:00

6.8 KiB

Raw Blame History

View Raw