gcc/
	PR tree-optimization/49809
	* tree-ssa-phiopt.c (cond_if_else_store_replacement): Use
	gimple_get_lhs instead of gimple_assign_lhs.

gcc/testsuite/
	PR tree-optimization/49809
	* gnat.dg/opt18.adb, gnat.dg/opt18.ads, gnat.dg/opt18_pkg.ads: New
	test.

From-SVN: r176750