fold-const.c (fold_comparison): Remove compile-time evaluation of complex constant...

fold-const.c (fold_comparison): Remove compile-time evaluation of complex constant equality/inequality...

	* fold-const.c (fold_comparison): Remove compile-time evaluation of
	complex constant equality/inequality comparisons for here.
	(fold_binary) <EQ_EXPR>: Simplify complex comparisons that are
	known at compile-time or can be simplified to a scalar comparison.
	(fold_relational_const): Move compile-time evaluation of complex
	constant equality/inequality comparisons to here.

	* gcc.dg/fold-eqcmplx-1.c: New test case.

From-SVN: r122767