Author: Frank Phillips
Date: 11:32:56 08/05/03
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On August 05, 2003 at 14:27:03, Eugene Nalimov wrote: >On August 05, 2003 at 13:35:18, Frank Phillips wrote: > >>... >> >>Eugene has previously stated that gcc is philosophically slow because of the >>developers intention to not concentrate on specific cpu architecture – I think. > >No, I did bot stated that. I stated that > >(1) Some ancient decisions were made in gcc design when VAX and mc68k were >primary gcc targets; the worst one is poor memory disambiguation. Now that >decisions hurt optimizations a lot, especially on CPUs with large number of >registers, but fixing those decisions require *highly coordinated* rewrite of >lot of code for lot of targets. > >(2) Some optimizations that would benefit *all* target CPUs are rejected on the >strictly ideological principles. > >Thanks, >Eugene > >>Frank I had in mind (2), but clearly misunderstood – apologies. (1) does perhaps not bode well for the AMD64 depending on what a large number of registers is .....? Frank
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