[Bug tree-optimization/51721] -Warray-bounds false positives and inconsistencies

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51721

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-03-05 
12:28:12 UTC ---
Author: jakub
Date: Mon Mar  5 12:27:55 2012
New Revision: 184927

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184927
Log:
    PR tree-optimization/51721
    * tree-vrp.c (register_edge_assert_for_2): If comparing
    lhs of right shift by constant with an integer constant,
    add ASSERT_EXPRs for the rhs1 of the right shift.

    * gcc.dg/tree-ssa/vrp63.c: New test.
    * gcc.dg/pr51721.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr51721.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp63.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c