8000 GH-135904: Optimize the JIT's assembly control flow by brandtbucher · Pull Request #135905 · python/cpython · GitHub
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GH-135904: Optimize the JIT's assembly control flow #135905

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Merged
merged 20 commits into from
Jun 27, 2025
Merged

GH-135904: Optimize the JIT's assembly control flow #135905

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5606078
Do some textual assembly magic
brandtbucher Jun 12, 2025
858624a
Switch to a linked list
brandtbucher Jun 12, 2025
77886d0
Handle prefixes
brandtbucher Jun 12, 2025
da72079
Rework optimizer and break it out into its own module
brandtbucher Jun 19, 2025
9ebb32c
Add AArch64 stub
brandtbucher Jun 20, 2025
4f85fab
Shake out some bugs on Windows
brandtbucher Jun 20, 2025
d2c9ae9
Disable dead code removal for now
brandtbucher Jun 20, 2025
ee97e87
More cleanup, don't add jumps
brandtbucher Jun 20, 2025
b436751
Fix Windows label detection (and cleanup)
brandtbucher Jun 20, 2025
fbb859d
fixup
brandtbucher Jun 20, 2025
4cfabf5
Add comment and jump detection for AArch64
brandtbucher Jun 20, 2025
77a8ba1
Fix bug in predecessor detection
brandtbucher Jun 23, 2025
a987be7
formatting
brandtbucher Jun 23, 2025
5ec6022
Commenting and cleanup
brandtbucher Jun 24, 2025
a577c36
More comments
brandtbucher Jun 24, 2025
807a359
fixup
brandtbucher Jun 24, 2025
3541ef7
fixup
brandtbucher Jun 24, 2025
51456c3
blurb add
brandtbucher Jun 24, 2025
6ddeaaf
Add comments, noise -> noninstructions, jrxz -> jrcxz, predecessor ->…
brandtbucher J 8000 un 25, 2025
b6da4e6
fixup
brandtbucher Jun 25, 2025
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fixup
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@brandtbucher
brandtbucher committed Jun 25, 2025
commit b6da4e6a13a42e88c5c3a1da0d8e9b56f1c1282a
3 changes: 3 additions & 0 deletions Tools/jit/_optimizers.py
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Expand Up @@ -287,6 +287,7 @@ class OptimizerAArch64(Optimizer): # pylint: disable = too-few-public-methods

# TODO: @diegorusso
_alignment = 8
# https://developer.arm.com/documentation/ddi0602/2025-03/Base-Instructions/B--Branch-
_re_jump = re.compile(r"\s*b\s+(?P<target>[\w.]+)")


Expand All @@ -297,7 +298,9 @@ class OptimizerX86(Optimizer): # pylint: disable = too-few-public-methods
_re_branch = re.compile(
rf"\s*(?P<instruction>{'|'.join(_X86_BRANCHES)})\s+(?P<target>[\w.]+)"
)
# https://www.felixcloutier.com/x86/jmp
_re_jump = re.compile(r"\s*jmp\s+(?P<target>[\w.]+)")
# https://www.felixcloutier.com/x86/ret
_re_return = re.compile(r"\s*ret\b")


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