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Re: [dataflow]: patch committed to do incremental scanning of rtl.



4) Many of the passes use defered scanning. In this mode, a bitmap is
kept of the insns that have been changed and at the end of the pass
all of the marked insns are rescanned. This is particularly efficient
for passes like combine which modify insns many times but do not
directly make use of the scanning information. FWprop also uses this
technique and has been re-enabled by this patch.

Thank you. I was about to write some thoughts about deferring the scan until the end of the pass, but you beat me by a wide margin.


Paolo


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