vect: Look through pattern stmt in fold_left_reduction.

It appears as if we "look through" a statement pattern in
vect_finish_replace_stmt but not before when we replace the newly
created vector statement's lhs.  Then the lhs is the statement pattern's
lhs while in vect_finish_replace_stmt we assert that it's from the
statement the pattern replaced.

This patch uses vect_orig_stmt on the scalar destination's definition so
the replaced statement is used everywhere.

gcc/ChangeLog:

	PR tree-optimization/112464

	* tree-vect-loop.cc (vectorize_fold_left_reduction): Use
	vect_orig_stmt on scalar_dest_def_info.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr112464.c: New test.

0 files changed, 0 insertions, 0 deletions