2010-11-30  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/46722
	* tree-ssa-math-opts.c (convert_mult_to_fma): Get multiplication
	operands as arguments.
	(execute_optimize_widening_mul): Also handle power of two as
	multiplication.

	* gcc.target/i386/fma4-fma-2.c: New testcase.

From-SVN: r167304