On Thu, 5 Jun 2014, Christian Bruel wrote: > Hello, > > while checking why a loop snippet like > > for (i = 0; i <= 5000; i++) > if (b) > a = 2; > else > a = x; > > was not optimized in -O2 (unless loop unrolling or loop switching), I > found out that the case was already partially handled by Richard in > PR43934. So this patch just adds a cost to the phi defs constants to > allow the whole test to be hoisted out of the loop. > > Richard, does this seem reasonable and OK for 4.10 ?
Ok with dropping the assert, constant-propagating cst_cost and adding a comment like /* Assign const 1 to invariants. */ Thanks, Richard.
