2011-03-11  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/48067
	* tree-ssa-math-opts.c (convert_mult_to_fma): Verify the
	multiplication result will be only used once on the target
	stmt.

	* gcc.dg/pr48067.c: New testcase.

From-SVN: r170877