PR tree-optimization/79411
	* tree-ssa-reassoc.c (is_reassociable_op): Return false if
	stmt operands are SSA_NAMEs used in abnormal phis.
	(can_reassociate_p): Return false if op is SSA_NAME used in abnormal
	phis.

	* gcc.c-torture/compile/pr79411.c: New test.

From-SVN: r245324