A few trivial improvements for code readability #35
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No feature change, just make code easier to read and understand
I have spent a few time deciphering the function prototype and magic number in code. Meaningful function declarations are essential for user to intuitively guess and use API parameters correctly.
ir_emit{,0,1,2,3} functions require optx
ir_emit_N function require opt
Make this explicit in function declaration.
Naming is kinda ugly. Have not got better names.