2017-08-04  Yury Gribov  <tetra2005@gmail.com>

	PR tree-optimization/57371

gcc/
	* match.pd: New pattern.

gcc/testsuite/
	* c-c++-common/pr57371-1.c: New test.
	* c-c++-common/pr57371-2.c: New test.
	* c-c++-common/pr57371-3.c: New test.
	* c-c++-common/pr57371-4.c: New test.
	* gcc.dg/pr57371-5.c: New test.

From-SVN: r250877