re PR rtl-optimization/87918 (ICE in simplify_binary_operation, at simplify-rtx.c:2153 since r264688)

	PR rtl-optimization/87918
	* simplify-rtx.c (simplify_merge_mask): For COMPARISON_P, use
	simplify_gen_relational rather than simplify_gen_binary.

	* gcc.target/i386/pr87918.c: New test.

From-SVN: r266062