[issue27127] Never have GET_ITER not followed by FOR_ITER

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

What if generate following code?

    GET_ITER
    JUMP_FORWARD L2
L1:
    # ...
L2:
    FOR_ITER L1

This saves one jump instruction per iteration.

Next, we can merge GET_ITER+JUMP_FORWARD in one FOR_BEGIN instruction for regular loops. Generators will start with JUMP_FORWARD.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27127>
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