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Subject: [Bug tree-optimization/65063] [4.8 Regression] gcc.dg/vect/vect-double-reduc-6.c FAILs with -O3 -fno-tree-loop-ivcanon -fno-tree-vectorize
Date: Wed, 25 Feb 2015 10:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65063

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Feb 25 10:28:01 2015
New Revision: 220960

URL: https://gcc.gnu.org/viewcvs?rev=220960&root=gcc&view=rev
Log:
2015-02-25  Richard Biener  <rguenther@suse.de>

    Backport from mainline
    2015-02-16  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/63593
    * tree-predcom.c (execute_pred_commoning_chain): Delay removing
    stmts and releasing SSA names until...
    (execute_pred_commoning): ... after processing all chains.

    * gcc.dg/pr63593.c: New testcase.

    2015-02-18  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/65063
    * tree-predcom.c (determine_unroll_factor): Return 1 if we
    have replaced looparound PHIs.

    * gcc.dg/pr65063.c: New testcase.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/pr63593.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/pr65063.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_8-branch/gcc/tree-predcom.c