2019-11-08  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/92324
	* tree-vect-loop.c (vect_create_epilog_for_reduction): Use
	STMT_VINFO_REDUC_VECTYPE for all computations, inserting
	sign-conversions as necessary.
	(vectorizable_reduction): Reject conversions in the chain
	that are not sign-conversions, base analysis on a non-converting
	stmt and its operation sign.  Set STMT_VINFO_REDUC_VECTYPE.
	* tree-vect-stmts.c (vect_stmt_relevant_p): Don't dump anything
	for debug stmts.
	* tree-vectorizer.h (_stmt_vec_info::reduc_vectype): New.
	(STMT_VINFO_REDUC_VECTYPE): Likewise.

	* gcc.dg/vect/pr92205.c: XFAIL.
	* gcc.dg/vect/pr92324-1.c: New testcase.
	* gcc.dg/vect/pr92324-2.c: Likewise.

From-SVN: r277955