[Bug tree-optimization/71522] [5/6 Regression] Wrong optimization of memcpy through a var of type long double

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71522

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jul  7 07:30:04 2016
New Revision: 238077

URL: https://gcc.gnu.org/viewcvs?rev=238077&root=gcc&view=rev
Log:
2016-07-07  Richard Biener  <rguenther@suse.de>

        Backport from mainline
        2016-05-25  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/71264
        * tree-vect-stmts.c (vect_init_vector): Properly deal with
        vector type val.

        * gcc.dg/vect/pr71264.c: New testcase.

        2016-06-07  Richard Biener  <rguenther@suse.de>

        PR middle-end/71423
        * match.pd ((X | ~Y) -> Y <= X): Properly invert the comparison
        for signed ops.

        * gcc.dg/torture/pr71423.c: New testcase.

        2016-06-14  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/71521
        * tree-vrp.c (extract_range_from_binary_expr_1): Guard
        division int_const_binop against zero divisor.

        * gcc.dg/tree-ssa/vrp101.c: New testcase.

        2016-06-08  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/71452
        * tree-ssa.c (non_rewritable_lvalue_p): Make sure that the
        type used for the SSA rewrite has enough precision to cover
        the dynamic type of the location.

        * gcc.dg/torture/pr71452.c: New testcase.

        2016-06-14  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/71522
        * tree-ssa.c (non_rewritable_lvalue_p): Do not rewrite non-float
        copying into float copying.

        * gcc.dg/torture/pr71522.c: New testcase.

Added:
    branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr71452.C
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr71423.c
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr71452.c
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr71522.c
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/tree-ssa/vrp101.c
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/vect/pr71264.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/match.pd
    branches/gcc-6-branch/gcc/testsuite/ChangeLog
    branches/gcc-6-branch/gcc/tree-ssa.c
    branches/gcc-6-branch/gcc/tree-vect-stmts.c
    branches/gcc-6-branch/gcc/tree-vrp.c