Computes the bitwise or of value1 and value2 (which must be ints). The int result replaces value1 and value2 on the stack.

Example

; This is like the Java code:
;       int x;
;       x |= 2;
;
iload_1          ; load local variable 1 onto stack
iconst_2         ; push the integer 2 onto the stack
ior              ; compute the bitwise or
istore_1         ; store the result in local variable 1