r230797 - in /trunk/gcc: ChangeLog optabs.c tes...

[jakub@gcc.gnu.org]

Author: jakub
Date: Tue Nov 24 10:45:52 2015
New Revision: 230797

URL: https://gcc.gnu.org/viewcvs?rev=230797&root=gcc&view=rev
Log:
	PR target/68483
	* tree-vect-generic.c (lower_vec_perm): If VEC_PERM_EXPR
	is valid vec_shr pattern, don't lower it even if can_vec_perm_p
	returns false.
	* optabs.c (shift_amt_for_vec_perm_mask): Return NULL_RTX
	whenever first is nelt or above.  Don't mask expected with
	2 * nelt - 1.

	* gcc.target/i386/pr68483-1.c: New test.
	* gcc.target/i386/pr68483-2.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr68483-1.c
    trunk/gcc/testsuite/gcc.target/i386/pr68483-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/optabs.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-generic.c