[Bug tree-optimization/79034] [6 Regression] error: missing PHI def in verify_gimple_in_cfg

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79034

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jan 26 13:08:43 2017
New Revision: 244930

URL: https://gcc.gnu.org/viewcvs?rev=244930&root=gcc&view=rev
Log:
2017-01-26  Richard Biener  <rguent...@suse.de>

        Backport from mainline
        2016-01-10  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/79034
        * tree-call-cdce.c (shrink_wrap_one_built_in_call_with_conds):
        Propagate out degenerate PHIs in the joiner.

        * g++.dg/torture/pr79034.C: New testcase.

        2016-11-07  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/78224
        * tree-call-cdce.c (shrink_wrap_one_built_in_call_with_conds):
        Split the fallthru edge in case its successor may have PHIs.
        Do not free dominance info.

        * g++.dg/torture/pr78224.C: New testcase.

Added:
    branches/gcc-5-branch/gcc/testsuite/g++.dg/torture/pr78224.C
    branches/gcc-5-branch/gcc/testsuite/g++.dg/torture/pr79034.C
Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/testsuite/ChangeLog
    branches/gcc-5-branch/gcc/tree-call-cdce.c