tree-ssa-loop-ivcanon.c (constant_after_peeling): Do not require sth as strict as a simple_iv but a chrec without symbols and an...

2016-04-21  Richard Biener  <rguenther@suse.de>

	* tree-ssa-loop-ivcanon.c (constant_after_peeling): Do not require
	sth as strict as a simple_iv but a chrec without symbols and an
	operand defined in the loop we are peeling (and not some subloop).
	(propagate_constants_for_unrolling): Propagate all constants.

	* gcc.dg/vect/no-scevccp-outer-13.c: Adjust to prevent unrolling
	of inner loops.
	* gcc.dg/vect/no-scevccp-outer-7.c: Likewise.
	* gcc.dg/vect/vect-104.c: Likewise.

From-SVN: r247048