Properly handle 256bit load cast.

gcc/

2011-05-18  H.J. Lu  <hongjiu.lu@intel.com>

	PR target/49002
	* config/i386/sse.md (avx_<ssemodesuffix><avxsizesuffix>_<ssemodesuffix>):
	Properly handle load cast.

gcc/testsuite/

2011-05-18  H.J. Lu  <hongjiu.lu@intel.com>

	PR target/49002
	* gcc.target/i386/pr49002-1.c: New test.
	* gcc.target/i386/pr49002-2.c: Likewise.

From-SVN: r173880