[Bug tree-optimization/71522] [5/6/7 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 #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jun 14 10:42:00 2016
New Revision: 237429

URL: https://gcc.gnu.org/viewcvs?rev=237429&root=gcc&view=rev
Log:
2016-06-14  Richard Biener  <rguent...@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:
    trunk/gcc/testsuite/gcc.dg/torture/pr71522.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa.c