[PATCH] fix combine.c:reg_nonzero_bits_for_combine where last_set_mode is narrower than mode

[Paulo Matos]

Please find patch for bug discussed in:
http://gcc.gnu.org/ml/gcc/2013-11/msg00571.html

Bootstrapped successfully in x86_64.

2013-11-29  Paulo Matos <pma...@broadcom.com>
             Eric Botcazou <ebotca...@adacore.com>

        * combine.c (reg_nonzero_bits_for_combine): Apply mask transformation
        as applied to nonzero_sign_valid fixing bug when last_set_mode has
        less precision than mode.


OK to submit?

Paulo Matos

reg_nonzero_bits_for_combine.patch
Description: reg_nonzero_bits_for_combine.patch