[Bug tree-optimization/64322] More optimize opportunity for constant folding

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64322

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Dec 17 09:29:12 2014
New Revision: 218812

URL: https://gcc.gnu.org/viewcvs?rev=218812&root=gcc&view=rev
Log:
    PR tree-optimization/64322
    * tree-vrp.c (extract_range_from_binary_expr_1): Attempt to derive
    range for RSHIFT_EXPR even if vr0 range is not VR_RANGE or is symbolic.

    * gcc.dg/tree-ssa/vrp95.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp95.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c