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Re: [PATCH, PR43920, 6/9] Cross-jumping - Use reg-notes.

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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?

Jeff
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