[Bug c/56566] bogus "is narrower than values of its type" warning

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56566

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-03-18 07:10:41 UTC ---
Author: jakub
Date: Mon Mar 18 07:10:33 2013
New Revision: 196767

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196767
Log:
    PR c/56566
    * tree.c (tree_int_cst_min_precision): For integer_zerop (value)
    return 1 even for !unsignedp.

    * c-c++-common/pr56566.c: New test.

Added:
    trunk/gcc/testsuite/c-c++-common/pr56566.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree.c