re PR other/63387 (Optimize pairs of isnan() calls into a single isunordered())

re PR other/63387 (Optimize pairs of isnan() calls into a single isunordered())

2015-05-22  Marc Glisse  <marc.glisse@inria.fr>

	PR tree-optimization/63387
gcc/
	* match.pd ((X /[ex] A) * A -> X): Remove unnecessary condition.
	((x ord x) & (y ord y) -> (x ord y),
	(x ord x) & (x ord y) -> (x ord y)): New simplifications.
	* fold-const.c (tree_unary_nonnegative_warnv_p) <ABS_EXPR>: Handle
	vectors like scalars.
gcc/testsuite/
	* gcc.dg/pr63387-2.c: New testcase.

From-SVN: r223591