re PR tree-optimization/54245 (incorrect optimisation)

re PR tree-optimization/54245 (incorrect optimisation)

gcc:

2012-08-15  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/54245
	* gimple-ssa-strength-reduction.c (legal_cast_p_1): New function.
	(legal_cast_p): Split out logic to legal_cast_p_1.
	(analyze_increments): Avoid introducing multiplies in smaller types.

gcc/testsuite:

2012-08-15  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/54245
	* gcc.dg/tree-ssa/pr54245.c: New test.

From-SVN: r190412