PR tree-optimization/69848
	* tree-vectorizer.h (enum vect_def_type): New condition reduction
	type CONST_COND_REDUCTION.
	* tree-vect-loop.c (vectorizable_reduction): Support new condition
	reudction type CONST_COND_REDUCTION.

	gcc/testsuite
	PR tree-optimization/69848
	* gcc.dg/vect/vect-pr69848.c: New test.

From-SVN: r239416