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author	Richard Biener <rguenther@suse.de>
	Tue, 21 May 2019 12:01:00 +0000 (12:01 +0000)
committer	Richard Biener <rguenth@gcc.gnu.org>
	Tue, 21 May 2019 12:01:00 +0000 (12:01 +0000)
commit	4f8b89f092467f9550cb2aa873c2e30ac809c08a
tree	d44631d84c87d1c813dd1788c15ca29337dbdf91	tree \| snapshot
parent	3b0657dce501046ebe11b7ba30653a41221f4797	commit \| diff

re PR tree-optimization/90510 (Unnecessary permutation)

2019-05-21 Richard Biener <rguenther@suse.de>

PR middle-end/90510
* fold-const.c (fold_read_from_vector): New function.
* fold-const.h (fold_read_from_vector): Declare.
* match.pd (VEC_PERM_EXPR): Build BIT_INSERT_EXPRs for
single-element insert permutations. Canonicalize selector
further and fix issue with last commit.

* gcc.target/i386/pr90510.c: New testcase.

From-SVN: r271463

gcc/ChangeLog		diff \| blob \| blame \| history
gcc/fold-const.c		diff \| blob \| blame \| history
gcc/fold-const.h		diff \| blob \| blame \| history
gcc/match.pd		diff \| blob \| blame \| history
gcc/testsuite/ChangeLog		diff \| blob \| blame \| history
gcc/testsuite/gcc.target/i386/pr90510.c	[new file with mode: 0644]	blob

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