re PR tree-optimization/83202 (Try joining operations on consecutive array elements during tree vectorization)

2017-11-30  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/83202
	* tree-ssa-loop-ivcanon.c (try_unroll_loop_completely): Add
	allow_peel argument and guard peeling.
	(canonicalize_loop_induction_variables): Likewise.
	(canonicalize_induction_variables): Pass false.
	(tree_unroll_loops_completely_1): Pass unroll_outer to disallow
	peeling from cunrolli.

	* gcc.dg/vect/pr83202-1.c: New testcase.
	* gcc.dg/tree-ssa/pr61743-1.c: Adjust.

From-SVN: r255267