re PR tree-optimization/88828 (Inefficient update of the first element of vector...

re PR tree-optimization/88828 (Inefficient update of the first element of vector registers)

2019-05-14  Richard Biener  <rguenther@suse.de>
	H.J. Lu  <hongjiu.lu@intel.com>

	PR tree-optimization/88828
	* tree-ssa-forwprop.c (simplify_vector_constructor): Handle
	permuting in a single non-constant element not extracted
	from a vector.

	* gcc.target/i386/pr88828-1.c: New test.
	* gcc.target/i386/pr88828-1a.c: Likewise.
	* gcc.target/i386/pr88828-1b.c: Likewise.
	* gcc.target/i386/pr88828-1c.c: Likewise.
	* gcc.target/i386/pr88828-4a.c: Likewise.
	* gcc.target/i386/pr88828-4b.c: Likewise.
	* gcc.target/i386/pr88828-5a.c: Likewise.
	* gcc.target/i386/pr88828-5b.c: Likewise.
	* gcc.target/i386/pr88828-7.c: Likewise.
	* gcc.target/i386/pr88828-7a.c: Likewise.
	* gcc.target/i386/pr88828-7b.c: Likewise.
	* gcc.target/i386/pr88828-8.c: Likewise.
	* gcc.target/i386/pr88828-8a.c: Likewise.
	* gcc.target/i386/pr88828-8b.c: Likewise.
	* gcc.target/i386/pr88828-9.c: Likewise.
	* gcc.target/i386/pr88828-9a.c: Likewise.
	* gcc.target/i386/pr88828-9b.c: Likewise.

Co-Authored-By: H.J. Lu <hongjiu.lu@intel.com>
From-SVN: r271153