break up JUMP_IF_NOT_EXC/EG_MATCH

[iritkatriel]

JUMP_IF_NOT_EXC_MATCH and JUMP_IF_NOT_EG_MATCH are not hot opcodes (they are part of exception handling).

If we break them up into
(1) check match
(2) POP_JUMP_IF_FALSE
then we will have fewer jump opcodes.

[iritkatriel]

The check opcodes don't have an arg, so we could merge them and use the oparg to distinguish between the except and except* versions.

[iritkatriel]

The check opcodes don't have an arg, so we could merge them and use the oparg to distinguish between the except and except* versions.

Actually these two versions have different stack_effects, so this may not be a good idea.

[iritkatriel]

BPO for this.

[iritkatriel]

This is done.