[Bug rtl-optimization/66187] [6 Regression] wrong code at -O1, -O2 and -O3 on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66187

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 19 13:54:32 2015
New Revision: 223366

URL: https://gcc.gnu.org/viewcvs?rev=223366&root=gcc&view=rev
Log:
        PR tree-optimization/66187
        * match.pd ((bit_and (plus/minus (convert @0) (convert @1)) mask)):
        Pass TYPE_SIGN to tree_int_cst_min_precision.  If
        !TYPE_OVERFLOW_WRAPS, ensure @4 is non-negative.

        * gcc.c-torture/execute/pr66187.c: New test.
        * gcc.dg/pr66187-1.c: New test.
        * gcc.dg/pr66187-2.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr66187.c
    trunk/gcc/testsuite/gcc.dg/pr66187-1.c
    trunk/gcc/testsuite/gcc.dg/pr66187-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog