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gh-130704: Strength reduce `LOAD_FAST{_LOAD_FAST}` by mpage · Pull Request #130708 · python/cpython · GitHub

gh-130704: Strength reduce LOAD_FAST{_LOAD_FAST} - #130708

Merged

mpage merged 81 commits into

python:mainfrom

mpage:load-fast-borrow-absinterp

Apr 1, 2025

Commits on Feb 28, 2025

Experiment with borrowing load_fast
mpage
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d716faa
Checkpoint poc
mpage
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3736923
Fix pyframe copy
mpage
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7a14254
Strengthen refs when frame is copied
mpage
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b1607aa
Cleanup
mpage
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e765735
Consider all instructions when computing mutations
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291ace9
Add a super instruction
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17d6dd6
Don't optimize during quickening
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0a74052
Use abstract interpretation
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afbfd88
Fix test_generators
mpage
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696c630
Optimize returns
mpage
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483ac7a
Remove unused arg
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259d5db
Make sure we convert borrowed refs on frame
mpage
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aeafa98
Don't test with malformed bytecode
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85f9a64
Make sure we convert borrowed refs to func/code when copying generator frame
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b6ab2f7
Add support for disassembling LOAD_FAST_BORROW_LOAD_FAST_BORROW
mpage
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fd1ad3d
Make sure exc_obj is always defined
mpage
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eee2195
Make sure we store new stackrefs for frame executable/funcobj
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d75ec9a
Remove refcount check
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66f5351
Don't hardcode initial refcount in refcount tests
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7ef6a0b
Remove invalid bytecode from `test_peepholer`
mpage
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2af2bbc
Fix invalid bytecode in `test_peepholer.DirectCfgOptimizerTests.test_unconditional_jump_threading`
mpage
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bf19b7d
Fix tests that checked for `LOAD_FAST` instructions that are now optimized to borrowed variants
mpage
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a9bca03
Update disassembly in test_dis to match new bytecode
mpage
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293c317
Fix refleak in _BINARY_OP_INPLACE_ADD_UNICODE
mpage
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a12ccd9
Create new references to fast locals overwritten via f_locals
mpage
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1ef26c5
Implement two missing opcodes in the static analysis
mpage
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1eb9226
Use g_block_list when resetting stack depth
mpage
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7291c49
Avoid reallocating state for each basic block
mpage
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90bf8df
Generators
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9bfa922
Move optimize after all other passes have run
mpage
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bf6222b
Don't promote borrowed references in STORE_FAST
mpage
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dd97d0c
Track reasons for not being able to optimize instructions
mpage
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6680709
Rename PyStackRef_DupDeferred
mpage
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6568fd9
Rename _PyStackRef_StealIfUnborrowed
mpage
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6fde7b0
Avoid extra copies in take_ownership
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de13810
Make the default build work
mpage
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fdeae7d
Add docs for new opcodes
mpage
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1aed281
Fix flag array size computation
mpage
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c332912
Add a high level comment explaining our approach
mpage
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76a75a7
Bump magic number after merge (was bumped on main)
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dd6426f
Add more tests
mpage
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bf68eb9
Update commented out assertion
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474a587
Add NEWS entry
mpage
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4b3aacf
Remove debug print
mpage
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e692037
Merge branch 'main' into load-fast-borrow-absinterp
mpage
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2ecfe08
Fix doctest
mpage
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f98d91d

Commits on Mar 1, 2025

Fix JIT tests
mpage
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725dc8e
Fix missed doctest
mpage
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03d35b2
Fix narrowing
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39ff3f0
Formatting
mpage
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f012a9f

Commits on Mar 13, 2025

Merge branch 'main' into load-fast-borrow-absinterp
mpage
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b4b7f73
Implement PyStackRef_{Is,Make}HeapSafe
mpage
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8ea82b5
Add missing error handling
mpage
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9bec9f5
Simplify frees
mpage
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902ae84
Get rid of `PyStackRef_IsBorrowed`
mpage
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b0ea38f

Commits on Mar 14, 2025

Use PyStackRef_Borrow as the new API
mpage
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1f5cfcd

Commits on Mar 15, 2025

Make the default build work
mpage
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d1e8e45

Commits on Mar 17, 2025

Merge branch 'main' into load-fast-borrow-absinterp
mpage
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00c95cc
Regen frozenmain
mpage
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cc01a30
Add a workaround for failing tests rather than change marshal.c
mpage
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6c5faab
Update dis.rst to reflect support for LOAD_FAST_BORROW in the default build
mpage
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32bd0c6
Exclude immortal objects when keeping overwritten locals alive
mpage
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fdb8a82
Use a tuple to store overwritten fast locals
mpage
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a962017
Fix off-by-one error
mpage
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6c2f07d

Commits on Mar 20, 2025

Merge branch 'main' into load-fast-borrow-absinterp
mpage
committed
85b0b00
Fix post-merge issues
mpage
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5ff2dea
English is hard
mpage
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0c1e67f
Improve readability of test cases
mpage
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ae2ec65
Elaborate in the blurb
mpage
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03c474e
Remove parameter to calculate stackdepth
mpage
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60665c9
Update comment
mpage
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ac8940b

Commits on Mar 21, 2025

Test optimize_load_fast as part of OptimizeCfg
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f12573f
Remove test with invalid bytecode
mpage
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44f7ffc
Add helper macro for pushing refs
mpage
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818e94e

Commits on Mar 23, 2025

Handle opcodes that leave at least one input on the stack
mpage
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c30e1e9
Merge branch 'main' into load-fast-borrow-absinterp
mpage
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112cee6
Avoid having stackref only visible from the c stack
mpage
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80fc5aa

Commits on Mar 24, 2025

Merge branch 'main' into load-fast-borrow-absinterp
mpage
committed
492cce1

Commits on Mar 31, 2025

Merge branch 'main' into load-fast-borrow-absinterp
mpage
committed
2e38f0d

Commits on Apr 1, 2025

Merge branch 'main' into load-fast-borrow-absinterp
mpage
committed
2c55722

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