[Bug tree-optimization/77544] [6 Regression] segfault at -O0 - infinite loop in simplification

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77544

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep 27 10:54:00 2016
New Revision: 240527

URL: https://gcc.gnu.org/viewcvs?rev=240527&root=gcc&view=rev
Log:
2016-09-27  Richard Biener  <rguenther@suse.de>

        Backport from mainline
        2016-09-01  Richard Biener  <rguenther@suse.de>

        PR middle-end/77436
        * tree-chrec.c (tree_fold_binomial): Use widest_int, properly
        check whether the result fits the desired result type.

        * gcc.dg/torture/pr77436.c: New testcase.

        2016-09-06  Richard Biener  <rguenther@suse.de>

        PR c/77450
        c-family/
        * c-common.c (c_common_mark_addressable_vec): Handle
        COMPOUND_LITERAL_EXPR.

        * gcc.dg/pr77450.c: New testcase.

        2016-09-19  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/77514
        * tree-ssa-pre.c (create_expression_by_pieces): Optimize
        search for folded stmt.

        2016-09-15  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/77514
        * tree-ssa-pre.c (create_expression_by_pieces): Handle garbage
        only forced_stmts sequence.

        * gcc.dg/torture/pr77514.c: New testcase.

        2016-09-15  Richard Biener  <rguenther@suse.de>

        PR middle-end/77544
        * fold-const.c (split_tree): Do not split constant ~X.

        * c-c++-common/torture/pr77544.c: New testcase.

        2016-09-19  Richard Biener  <rguenther@suse.de>

        PR middle-end/77605
        * tree-data-ref.c (analyze_subscript_affine_affine): Use the
        proper niter to bound the loops.

        * gcc.dg/torture/pr77605.c: New testcase.

        2016-09-22  Richard Biener  <rguenther@suse.de>

        PR middle-end/77679
        * gimple-fold.c (fold_array_ctor_reference): Turn asserts into
        fold fails.

Added:
    branches/gcc-6-branch/gcc/testsuite/c-c++-common/torture/pr77544.c
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr77450.c
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr77436.c
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr77514.c
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr77605.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/c-family/ChangeLog
    branches/gcc-6-branch/gcc/c-family/c-common.c
    branches/gcc-6-branch/gcc/fold-const.c
    branches/gcc-6-branch/gcc/gimple-fold.c
    branches/gcc-6-branch/gcc/testsuite/ChangeLog
    branches/gcc-6-branch/gcc/tree-chrec.c
    branches/gcc-6-branch/gcc/tree-data-ref.c
    branches/gcc-6-branch/gcc/tree-ssa-pre.c