Re: [PATCH] i386: Add more forms peephole2 for adc/sbb

On Mon, May 26, 2025 at 4:55 PM Hu, Lin1 wrote: > > Hi, all > > Enable -mapxf will change some patterns about adc/sbb. > > Hence gcc will raise an extra mov like > movq8(%rdi), %rax > adcq%rax, 8(%rsi), %rax > movq%rax, 8(%rdi) > rather than > movq

[PATCH] i386: Add more forms peephole2 for adc/sbb

Hi, all Enable -mapxf will change some patterns about adc/sbb. Hence gcc will raise an extra mov like movq8(%rdi), %rax adcq%rax, 8(%rsi), %rax movq%rax, 8(%rdi) rather than movq8(%rsi), %rax adcq%rax, 8(%rdi) The patch add more ki