[Bug tree-optimization/60280] [4.9 Regression] gcc.target/arm/ivopts.c and gcc.target/arm/ivopts-2.c failed caused by preserving loop structure.

[amker at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60280

--- Comment #5 from amker at gcc dot gnu.org ---
Author: amker
Date: Wed Feb 26 01:49:35 2014
New Revision: 208165

URL: http://gcc.gnu.org/viewcvs?rev=208165&root=gcc&view=rev
Log:

    PR target/60280
    * tree-cfgcleanup.c (tree_forwarder_block_p): Protect loop
    preheaders and latches only if requested.  Fix latch if it
    is removed.
    * tree-ssa-dom.c (tree_ssa_dominator_optimize): Set
    LOOPS_HAVE_PREHEADERS.

    PR target/60280
    * gnat.dg/renaming5.adb: Change to two expected gotos.
    * gcc.dg/tree-ssa/pr21559.c: Change back to three expected
    jump threads.
    * gcc.dg/tree-prof/update-loopch.c: Check two "Invalid sum"
    messages for removed basic block.
    * gcc.dg/tree-ssa/ivopt_1.c: Fix unreliable scanning string.
    * gcc.dg/tree-ssa/ivopt_2.c: Ditto.
    * gcc.dg/tree-ssa/ivopt_3.c: Ditto.
    * gcc.dg/tree-ssa/ivopt_4.c: Ditto.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/tree-prof/update-loopch.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ivopt_1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ivopt_2.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ivopt_3.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ivopt_4.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr21559.c
    trunk/gcc/testsuite/gnat.dg/renaming5.adb
    trunk/gcc/tree-cfgcleanup.c
    trunk/gcc/tree-ssa-dom.c