gcc/
	PR tree-optimization/23234
	* tree-ssa-math-opts.c (place_reciprocal): New enum.
	(execute_cse_reciprocals_1): Replace the 'phi' argument with an
	argument of the new enum.
	(execute_cse_reciprocals): Add reciprocals for function arguments
	on the unique successor edge of the entry block.  Update other calls
	to execute_cse_reciprocals_1.

testsuite/
	PR tree-optimization/23234
	* gcc.dg/tree-ssa/pr23234.c: New test.

From-SVN: r102895