[Bug tree-optimization/71691] [6/7 Regression] wrong code at -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu (Floating point exception)

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71691

--- Comment #21 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Author: aldyh
Date: Tue Jan 31 10:30:47 2017
New Revision: 245057

URL: https://gcc.gnu.org/viewcvs?rev=245057&root=gcc&view=rev
Log:
        PR tree-optimization/71691
        * bitmap.h (class auto_bitmap): New.
        * tree-ssa-loop-unswitch.c (tree_may_unswitch_on): Call
        is_maybe_undefined instead of ssa_undefined_value_p.

Added:
    trunk/gcc/testsuite/gcc.dg/loop-unswitch-5.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/bitmap.h
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/loop-unswitch-1.c
    trunk/gcc/tree-ssa-loop-unswitch.c