[Bug tree-optimization/47355] [4.6 Regression] ICE: verify_ssa failed with -O2 -fipa-cp-clone

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47355

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-20 10:45:43 UTC ---
Created attachment 23042
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23042
gcc46-pr47355.patch

Untested fix.  Seems ehcleanup assumes nop is used just in the following phi
and not somewhere else, because it doesn't attempt to rename it.  I'll see with
this patch how much it triggers during bootstraps/regtests.  We can't just
replace the other uses in this case, because it is changed in the loop.