[Bug middle-end/81719] Range-based for loop on short fixed size array generates long unrolled loop

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81719

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Aug  8 12:51:20 2017
New Revision: 250954

URL: https://gcc.gnu.org/viewcvs?rev=250954&root=gcc&view=rev
Log:
2017-08-08  Richard Biener  <rguent...@suse.de>

        PR middle-end/81719
        * tree-ssa-loop-niter.c: Include tree-dfa.h.
        (expand_simple_operations): Also look through ADDR_EXPRs with
        MEM_REF bases treating them as POINTER_PLUS_EXPR.

        * g++.dg/tree-ssa/pr81719.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/tree-ssa/pr81719.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-niter.c