On 03/31/2011 08:52 PM, Jeff Law wrote: > On 03/31/11 12:42, Tom de Vries wrote: >> Uses regnotes to analyze whether we can replace insn a by insn b, even >> if we cannot replace insn b by insn a. Uses this info in crossjumping.
> Shouldn't this be using single_set rather than digging through PATTERN, > then verifying both are SETs, etc.? > > Otherwise don't you miss most of the benefit on architectures where most > insns clobber the flags register in a PARALLEL with the SET? I see what you mean about missing these insns currently. I guess I will have to check that the non-SET part of the PARALLEL is identical between the 2 insns. I'll update the patch to handle this case. Thanks, - Tom
