re PR middle-end/26134 (fold *(float*)(&complex_float_var) into REALPART_EXPR<complex_float_var>)

2011-03-16  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/26134
	* tree-ssa.c (maybe_rewrite_mem_ref_base): Handle rewriting
	complex part accesses to REALPART_EXPR and IMAGPART_EXPR.
	(non_rewritable_mem_ref_base): Handle complex type component
	accesses, constrain offsets for vector and complex extracts
	more properly.

	* gcc.dg/tree-ssa/complex-6.c: New testcase.

From-SVN: r171046