[Bug tree-optimization/50183] ICE in verify_ssa for 416.gamess when optimizing using profile data

[wschmidt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50183

--- Comment #8 from William J. Schmidt <wschmidt at gcc dot gnu.org> 2011-09-12 20:15:59 UTC ---
Previous comment is incorrect.  The statement:

  # err2.395_571 = PHI <err2.395_561(43)>

is the close_phi for the outer loop, while:

  # err2.395_561 = PHI <err2.395_219(41)>

is the close_phi for the inner loop.  Deleting the second one is fine under the
assumption that the first one will become dead code after an assignment to
err2.395_571 is introduced following it.  However, somewhere along the way the
LHS of the first one was replaced, and that assumption no longer holds. 
Continuing to dig.