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gh-93554: Conditional jump opcodes only jump forward (GH-96318)

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Irit Katriel 2022-09-01 21:36:47 +01:00 • committed by GitHub
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13 changed files with 298 additions and 448 deletions
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Doc/library/dis.rst
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@ -999,60 +999,48 @@ iterations of the loop.
.. versionadded:: 3.11
.. opcode:: POP_JUMP_FORWARD_IF_TRUE (delta)
.. opcode:: POP_JUMP_IF_TRUE (delta)
If TOS is true, increments the bytecode counter by *delta*. TOS is popped.
.. versionadded:: 3.11
.. versionchanged:: 3.11
The oparg is now a relative delta rather than an absolute target.
This opcode is a pseudo-instruction, replaced in final bytecode by
the directed versions (forward/backward).
.. versionchanged:: 3.12
This is no longer a pseudo-instruction.
.. opcode:: POP_JUMP_BACKWARD_IF_TRUE (delta)
If TOS is true, decrements the bytecode counter by *delta*. TOS is popped.
.. versionadded:: 3.11
.. opcode:: POP_JUMP_FORWARD_IF_FALSE (delta)
.. opcode:: POP_JUMP_IF_FALSE (delta)
If TOS is false, increments the bytecode counter by *delta*. TOS is popped.
.. versionadded:: 3.11
.. versionchanged:: 3.11
The oparg is now a relative delta rather than an absolute target.
This opcode is a pseudo-instruction, replaced in final bytecode by
the directed versions (forward/backward).
.. versionchanged:: 3.12
This is no longer a pseudo-instruction.
.. opcode:: POP_JUMP_BACKWARD_IF_FALSE (delta)
If TOS is false, decrements the bytecode counter by *delta*. TOS is popped.
.. versionadded:: 3.11
.. opcode:: POP_JUMP_FORWARD_IF_NOT_NONE (delta)
.. opcode:: POP_JUMP_IF_NOT_NONE (delta)
If TOS is not ``None``, increments the bytecode counter by *delta*. TOS is popped.
.. versionadded:: 3.11
.. opcode:: POP_JUMP_BACKWARD_IF_NOT_NONE (delta)
If TOS is not ``None``, decrements the bytecode counter by *delta*. TOS is popped.
.. versionadded:: 3.11
.. versionchanged:: 3.12
This is no longer a pseudo-instruction.
.. opcode:: POP_JUMP_FORWARD_IF_NONE (delta)
.. opcode:: POP_JUMP_IF_NONE (delta)
If TOS is ``None``, increments the bytecode counter by *delta*. TOS is popped.
.. versionadded:: 3.11
.. opcode:: POP_JUMP_BACKWARD_IF_NONE (delta)
If TOS is ``None``, decrements the bytecode counter by *delta*. TOS is popped.
.. versionadded:: 3.11
.. versionchanged:: 3.12
This is no longer a pseudo-instruction.
.. opcode:: JUMP_IF_TRUE_OR_POP (delta)
@ -1433,10 +1421,6 @@ but are replaced by real opcodes or removed before bytecode is generated.
.. opcode:: JUMP
.. opcode:: JUMP_NO_INTERRUPT
.. opcode:: POP_JUMP_IF_FALSE
.. opcode:: POP_JUMP_IF_TRUE
.. opcode:: POP_JUMP_IF_NONE
.. opcode:: POP_JUMP_IF_NOT_NONE
Undirected relative jump instructions which are replaced by their
directed (forward/backward) counterparts by the assembler.