2017-06-29 Kyrylo Tkachov <kyrylo.tkachov@arm.com>

2017-06-29  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
	    Michael Collison <michael.collison@arm.com>

	PR target/70119
	* config/aarch64/aarch64.md (*aarch64_<optab>_reg_<mode>3_mask1):
	New pattern.
	(*aarch64_reg_<mode>3_neg_mask2): New pattern.
	(*aarch64_reg_<mode>3_minus_mask): New pattern.
	(*aarch64_<optab>_reg_di3_mask2): New pattern.
	* config/aarch64/aarch64.c (aarch64_rtx_costs): Account for cost
	of shift when the shift amount is masked with constant equal to
	the size of the mode.
	* config/aarch64/predicates.md (subreg_lowpart_operator): New
	predicate.

2017-06-29  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
	    Michael Collison <michael.collison@arm.com>

	PR target/70119
	* gcc.target/aarch64/var_shift_mask_1.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@249774 138bc75d-0d04-0410-961f-82ee72b054a4