re PR target/50788 (ICE: in merge_overlapping_regs, at regrename.c:318 with -mavx...

re PR target/50788 (ICE: in merge_overlapping_regs, at regrename.c:318 with -mavx -fpeel-loops -fstack-protector-all and __builtin_ia32_maskloadpd256)

	PR target/50788
	* config/i386/sse.md (avx2_maskload<ssemodesuffix><avxsizesuffix>):
	Remove (match_dup 0).
	(*avx2_maskload<ssemodesuffix><avxsizesuffix>): New insn pattern.
	(*avx_maskload<ssemodesuffix><avxsizesuffix>): Ditto.
	(*avx2_maskstore<ssemodesuffix><avxsizesuffix>): Ditto.
	(*avx_maskstore<ssemodesuffix><avxsizesuffix>): Ditto.
	(*avx2_maskmov<ssemodesuffix><avxsizesuffix>): Remove insn pattern.
	(*avx_maskmov<ssemodesuffix><avxsizesuffix>): Ditto.

testsuite/ChangeLog:

2011-10-23  Uros Bizjak  <ubizjak@gmail.com>

	PR target/50788
	* testsuite/gcc.target/i386/pr50788.c: New test.

From-SVN: r180335