[Bug tree-optimization/52678] [4.7 Regression] internal compiler error: in vect_update_ivs_after_vectorizer, at tree-vect-loop-manip.c:1842

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52678

--- Comment #8 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-04-03 11:55:29 UTC ---
Author: rguenth
Date: Tue Apr  3 11:55:24 2012
New Revision: 186105

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186105
Log:
2012-04-03  Richard Guenther  <rguenther@suse.de>

    Backport from mainline
    2012-03-06  Richard Guenther  <rguenther@suse.de>

    PR middle-end/52493
    * tree-ssa-alias.c (ptr_derefs_may_alias_p): Robustify.

    * gcc.dg/torture/pr52493.c: New testcase.

    2012-03-23  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/52678
    * tree-vectorizer.h (struct _stmt_vec_info): Add
    loop_phi_evolution_part member.
    (STMT_VINFO_LOOP_PHI_EVOLUTION_PART): New define.
    * tree-vect-loop.c (vect_analyze_scalar_cycles_1): Initialize
    STMT_VINFO_LOOP_PHI_EVOLUTION_PART.
    * tree-vect-loop-manip.c (vect_update_ivs_after_vectorizer):
    Use the cached evolution part and the PHI nodes value from
    the loop preheader edge instead of re-analyzing the evolution.

    * gfortran.dg/pr52678.f: New testcase.

    2012-03-26  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/52701
    * tree-vect-loop.c (vect_analyze_scalar_cycles_1): Always
    compute and set the evolution part of PHI nodes.

    * gfortran.dg/pr52701.f90: New testcase.

    2012-03-30  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/52754
    * tree-ssa-forwprop.c (forward_propagate_addr_expr_1): Only
    propagate arbitrary addresses into really plain dereferences.

    * gcc.target/i386/pr52754.c: New testcase.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/torture/pr52493.c
    branches/gcc-4_7-branch/gcc/testsuite/gcc.target/i386/pr52754.c
    branches/gcc-4_7-branch/gcc/testsuite/gfortran.dg/pr52678.f
    branches/gcc-4_7-branch/gcc/testsuite/gfortran.dg/pr52701.f90
Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_7-branch/gcc/tree-ssa-alias.c
    branches/gcc-4_7-branch/gcc/tree-ssa-forwprop.c
    branches/gcc-4_7-branch/gcc/tree-vect-loop-manip.c
    branches/gcc-4_7-branch/gcc/tree-vect-loop.c
    branches/gcc-4_7-branch/gcc/tree-vectorizer.h