[Bug rtl-optimization/51924] [4.7 regression] wrong code with -O -free -fno-rename-registers -ftree-vectorize -funroll-loops

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51924

--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-01-22 14:35:44 UTC ---
Author: ebotcazou
Date: Sun Jan 22 14:35:39 2012
New Revision: 183390

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=183390
Log:
    PR rtl-optimization/51924
    * ree.c (combine_set_extension): Improve debugging message.
    (combine_reaching_defs): Likewise.
    (get_defs): Rename confusingly named variable.
    (find_and_remove_re): Skip a candidate if the extension expression has
    been modified.

Added:
    trunk/gcc/testsuite/gcc.dg/ext-elim-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ree.c
    trunk/gcc/testsuite/ChangeLog