[Bug tree-optimization/50557] [4.7 Regression] Register pressure increase after reassociation (x86, 32 bits)

[wschmidt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50557

--- Comment #4 from William J. Schmidt <wschmidt at gcc dot gnu.org> 2011-09-29 12:16:46 UTC ---
No, that's OK.  I should be able to reproduce this on a pool machine.

It may be difficult to come up with a good heuristic here given that
reassociation doesn't have a good estimate of register pressure available.  The
fix solved a couple of other problem reports in addition to 49749, so we need
to be careful about constraining it too much.

All this is just to say I may not have something for you right away. :)