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Re: ssa bootstrap problem on x86 (cmpstrsi_1 pattern)
>>>>> "Richard" == Richard Henderson <rth@cygnus.com> writes:
Richard> On Thu, Jul 27, 2000 at 01:10:11PM -0700, Mark Mitchell
Richard> wrote:
>> I think we need to bite the bullet and get the CLOBBERs out of
>> there; otherwise, we are forced to do some kind of dataflow
>> anlaysis in SSA...
Richard> Not at all. We have a register set, once, to an
Richard> unspecified value. That unspecified value is "valid"
Richard> everywhere, just as with a register set to a useful
Richard> value.
In Geoff's examples, I believe it was SET once, and then CLOBBERed.
Did I misread?
--
Mark Mitchell mark@codesourcery.com
CodeSourcery, LLC http://www.codesourcery.com