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[3.14] GH-123299: Copyedit 3.14 What's New: CPython bytecode changes (GH-139402) #139420

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Merged
hugovk merged 2 commits into from
Sep 29, 2025
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[3.14] GH-123299: Copyedit 3.14 What's New: CPython bytecode changes (GH-139402) #139420

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GH-123299: Copyedit 3.14 What's New: CPython bytecode changes (GH-139…
AA-Turner Sep 29, 2025
0da40d9
Revert "Delete LOAD_CONST_IMMORTAL (it exists in 3.14 but not 15)"
AA-Turner Sep 29, 2025
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Revert "Delete LOAD_CONST_IMMORTAL (it exists in 3.14 but not 15)" 
This reverts commit 7a1cc7f.
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@AA-Turner
AA-Turner committed Sep 29, 2025
commit 0da40d9c2827592397b5536e0cee8e9441f46275
5 changes: 5 additions & 0 deletions Doc/library/dis.rst
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Expand Up @@ -1964,6 +1964,11 @@ but are replaced by real opcodes or removed before bytecode is generated.
``SETUP_CLEANUP`` or ``SETUP_WITH``.


.. opcode:: LOAD_CONST_IMMORTAL (consti)

Works as :opcode:`LOAD_CONST`, but is more efficient for immortal objects.


.. opcode:: JUMP
JUMP_NO_INTERRUPT

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2 changes: 1 addition & 1 deletion Doc/whatsnew/3.14.rst
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Expand Up @@ -2864,7 +2864,7 @@ Pseudo-instructions
* Add the :opcode:`!LOAD_CONST_MORTAL` pseudo instruction.
(Contributed by Mark Shannon in :gh:`128685`.)

* Add the :opcode:`!LOAD_CONST_IMMORTAL` pseudo instruction,
* Add the :opcode:`LOAD_CONST_IMMORTAL` pseudo instruction,
which does the same as :opcode:`!LOAD_CONST`, but is more efficient
for immortal objects.
(Contributed by Mark Shannon in :gh:`125837`.)
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2 changes: 1 addition & 1 deletion Misc/NEWS.d/3.14.0a2.rst
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Expand Up @@ -1400,7 +1400,7 @@ The :class:`memoryview` type now supports subscription, making it a
.. nonce: KlCdgD
.. section: Core and Builtins

Adds :opcode:`LOAD_SMALL_INT` and :opcode:`!LOAD_CONST_IMMORTAL`
Adds :opcode:`LOAD_SMALL_INT` and :opcode:`LOAD_CONST_IMMORTAL`
instructions. ``LOAD_SMALL_INT`` pushes a small integer equal to the
``oparg`` to the stack. ``LOAD_CONST_IMMORTAL`` does the same as
``LOAD_CONST`` but is more efficient for immortal objects. Removes
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