public VectorSTL<OpTpl> createOpNoOut(Location location, OpCode opc, ExprTree vn) {
		entry("createOpNoOut", opc, vn);
		OpTpl op = new OpTpl(location, opc);
		op.addInput(vn.outvn);
		vn.outvn = null; // There is no longer an output to this expression
		VectorSTL<OpTpl> res = vn.ops;
		vn.ops = null;
		res.push_back(op);
		return res;
	}
Handle a sleigh 'macro' invocation, returning the resulting p-code op templates (OpTpl)

@param location is the file/line where the macro is invoked
@param sym MacroSymbol is the macro symbol
@param param is the parsed list of operand expressions
@return a list of p-code op templates
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/pcodeCPort/slgh_compile/PcodeCompile.java