2005-11-07  Paolo Bonzini  <bonzini@gnu.org>

        * c-typeck.c (build_c_cast): Try using a shared constant, and see
        if TREE_OVERFLOW or TREE_CONSTANT_OVERFLOW really changed.

testsuite:
2005-11-07  Paolo Bonzini  <bonzini@gnu.org>

        * gcc.dg/overflow-2.c: New testcase.

From-SVN: r106587