On Tue, Oct 20, 2015 at 10:22:53AM -0600, Jeff Law wrote: > bz21182 has a testcase that's still helped by local register variables.
I tried it out, and it now is much worse *with* the reg vars than without (and -O2 vs. -O3 makes no difference at all). It doesn't look to have used the pre-determined allocation at all. The difference at expand time is huge already; maybe some things weren't optimised at tree level with the register vars? It's a bit big to really look into ;-) Segher
