[tree-ssa-mathopts] PR tree-optimization/87259: Call execute_cse_reciprocals_1 before trying optimize_recip_sqrt

	PR tree-optimization/87259
	PR lto/87283
	(pass_cse_reciprocals::execute): Run optimize_recip_sqrt after
	execute_cse_reciprocals_1 has tried transforming.

	PR tree-optimization/87259
	* gcc.dg/pr87259.c: New test.

From-SVN: r264312