/**
* Swizzle away later components, but preserve the ordering.
*/
-ir_swizzle *swizzle_for_size(operand a, int components);
+ir_swizzle *swizzle_for_size(operand a, unsigned components);
ir_swizzle *swizzle_xxxx(operand a);
ir_swizzle *swizzle_yyyy(operand a);