[Bug tree-optimization/69726] [6 Regression] Bogus warnings with -O3 -Wuninitialized because dead code after if-conversion

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69726

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Feb 10 12:46:33 2016
New Revision: 233267

URL: https://gcc.gnu.org/viewcvs?rev=233267&root=gcc&view=rev
Log:
2016-02-10  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/69726
        * passes.def: Add DCE pass before late uninit.
        * match.pd: Add A ? B : (!A ? C : X) -> A ? B : C patterns to
        really fixup if-conversions job.

        * gcc.dg/uninit-22.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/uninit-22.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/passes.def
    trunk/gcc/testsuite/ChangeLog