------- Comment #5 from rakdver at kam dot mff dot cuni dot cz 2007-05-07 09:38 ------- Subject: Re: [4.2/4.3 Regression] Code size regression caused by fix to PR 31360
> (In reply to comment #2) > > > 1) Hoists a register containing 0 out of the loop > > The correct thing to do. > > > Not necessarily. Hoisting literal constants means that opportunities to > simply > insns based on that constant are potentially lost. This could be prevented if invariant motion added equivalence notes; nevertheless, one could argue that such simplifications should have been performed before loop invariant motion (in cse). -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31849
