> > The rtx_cost may consider the compare operation in `seq` as quite expensive.
> Overall it sounds like a target issue to me -- ie, now that we're
> testing for profitability instead of just assuming it's profitable some
> targets need adjustment. Either in their costing model or in the
> testsuite expectations.
>
Yes. You are right, I find the real problem. In mips-cpus.def
MIPS_CPU ("mips32", PROCESSOR_4KC, MIPS_ISA_MIPS32,
PTF_AVOID_BRANCHLIKELY_ALWAYS)
MIPS_CPU ("mips64", PROCESSOR_5KC, MIPS_ISA_MIPS64,
PTF_AVOID_BRANCHLIKELY_ALWAYS)
MIPS_CPU ("mips64r2", PROCESSOR_5KC, MIPS_ISA_MIPS64R2,
PTF_AVOID_BRANCHLIKELY_ALWAYS)
MIPS_CPU ("mips64r3", PROCESSOR_5KC, MIPS_ISA_MIPS64R3,
PTF_AVOID_BRANCHLIKELY_ALWAYS)
MIPS_CPU ("mips64r5", PROCESSOR_5KC, MIPS_ISA_MIPS64R5,
PTF_AVOID_BRANCHLIKELY_ALWAYS)
Here PROCESSOR_4KC and PROCESSOR_5KC are both FPU-less.
> Jeff
>
--
YunQiang Su
