af3de9e209
Another czero related adjustment. This time in costing of conditional move sequences. Essentially a copy from a promoted subreg can and should be ignored from a costing standpoint. We had some code to do this, but its conditions were too strict. No real surprises evaluating spec. This should be a minor, but probably not measurable improvement in x264 and xz. It is if-converting more in some particular harm to hot routines, but not necessarily in the hot parts of those routines. It's been tested on riscv32-elf and riscv64-elf. Versions of this have bootstrapped and regression tested as well, though perhaps not this exact version. Waiting on pre-commit testing. gcc/ * config/riscv/riscv.cc (riscv_noce_conversion_profitable_p): Relax condition for adjustments due to copies from promoted SUBREGs. |
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