2019-04-03 Richard Biener <rguenther@suse.de>

2019-04-03  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/84101
	* tree-vect-stmts.c: Include explow.h for hard_function_value,
	regs.h for hard_regno_nregs.
	(cfun_returns): New helper.
	(vect_model_store_cost): When vectorizing a store to a decl
	we return and the function ABI returns in a multi-reg location
	account for the possible spilling that will happen.

	* gcc.target/i386/pr84101.c: New testcase.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@270123 138bc75d-0d04-0410-961f-82ee72b054a4