------- Comment #21 from hjl at lucon dot org 2007-06-04 22:19 ------- (In reply to comment #20) > Subject: Re: [4.3 Regression] reassoc2 can more extra calculations into a > loop > > > Can anyone show that the newly added dce_loop anything useful? > > Yes, predictive commoning does not work as well if there is dead code > (which is why it was added. >
But predictive commoning isn't enabled at -O2, why add it for -O2? What does it give us at -O2? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32183
