re PR tree-optimization/89487 (ICE in expand_expr_addr_expr_1, at expr.c:7993)

	PR tree-optimization/89487
	* gcc.dg/tree-ssa/pr89487.c: Include ../pr87600.h.
	(caml_interprete): Ifdef the whole body out if REG1 or REG2 macros
	aren't defined.  Use REG1 instead of "%r15" and REG2 instead of
	"%r14".

From-SVN: r269388