Craig Topper 2ad50f354a [DAGCombiner][RISCV][AArch64][PowerPC] Restrict foldAndOrOfSETCC from using SMIN/SMAX where and OR/AND would do. ...

This removes some diffs created by D153502.

I'm assuming an AND/OR won't be worse than an SMIN/SMAX. For
RISC-V at least, AND/OR can be a shorter encoding than SMIN/SMAX.

It's weird that we have two different functions responsible for
folding logic of setccs, but I'm not ready to try to untangle that.

I'm unclear if the PowerPC chang is a regression or not. It looks
like it might use more registers, but I don't understand PowerPC
register so I'm not sure.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D158292

2023-08-23 20:26:23 -07:00

6.7 KiB

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