re PR tree-optimization/77848 (Gimple if-conversion results in redundant comparisons)

re PR tree-optimization/77848 (Gimple if-conversion results in redundant comparisons)

2016-11-16  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/77848
	* tree-if-conv.c (version_loop_for_if_conversion): When versioning
	an outer loop, only save basic block aux information for the inner
	loop.
	(versionable_outer_loop_p): New function.
	(tree_if_conversion): Version the outer loop instead of the inner
	one if the pattern will be recognized for outer-loop
	vectorization.

From-SVN: r242520