[Bug tree-optimization/77808] [7 Regression] ICE in duplicate_ssa_name_ptr_info, at tree-ssanames.c:630 starting with r240439

[mpf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77808

--- Comment #1 from mpf at gcc dot gnu.org ---
Author: mpf
Date: Tue Oct  4 15:28:23 2016
New Revision: 240749

URL: https://gcc.gnu.org/viewcvs?rev=240749&root=gcc&view=rev
Log:
Fix PR tree-optimization/77808

gcc/
        PR tree-optimization/77808
        * tree-ssa-loop-prefetch.c (issue_prefetch_ref): Check base_addr
        and addr are different before copying points-to information.

gcc/testsuite/
        PR tree-optimization/77808
        * gcc.dg/tree-ssa/pr77808.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr77808.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-prefetch.c