expmed.c (strict_volatile_bitfield_p): Check that the access will not cross a MODESIZ...

expmed.c (strict_volatile_bitfield_p): Check that the access will not cross a MODESIZE boundary.

gcc:
2015-04-01  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * expmed.c (strict_volatile_bitfield_p): Check that the access will
        not cross a MODESIZE boundary.
        (store_bit_field, extract_bit_field): Added assertions in the
        strict volatile bitfields code path.

testsuite:
2015-04-01  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * gcc.dg/pr23623.c: Added aligned attribute.
        * gcc.dg/20141029-1.c: Likewise.
        * gcc.dg/20150306-1.c: New test.

From-SVN: r221809