[mypyc] Add irbuild support for vec types#20724

Merged

JukkaL merged 180 commits intomasterfrom

mypyc-vec

Feb 3, 2026

Commits on Feb 2, 2026

[vec] Basic vec support
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Various fixes
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Fix vec test case
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Fix vec comprehensions
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Fix type applications
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Support some borrowing with vecs
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Update a few test cases
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Add TODO
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[WIP] Start work on new representation for vecs
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Support vec[i64] remove()
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Support vec instances in attributes
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Support vec[i64] pop with new repr
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Some partial support for vec[t]
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Some partial support for vec[t | None]
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Test updates
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More vec[t] operations
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Format code
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[mypyc] Add SetElement op for initializing struct values
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Add initial nested vec support
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Add vec tests
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Fix compile errors during vec construction
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Update test case
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Support vec get item in more cases
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Fix set item
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Fix serialization
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Update tests
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Update test case
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Add pop test case
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Update test case
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Fix refcounting of item type + update tests
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Refactor vec irbuild tests
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Add vec test case
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Fix always defined attribute analysis
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WIP make benchmarks compile (not working)
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Format code
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Properly support vec error values
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Fix vec remove
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Fix nested vec get item
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Update some tests
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Implement unboxing
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Split vec tests into multiple files
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Add comments to tests
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Fix set item + add some run tests
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Add test cases
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Add test cases
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Test contains
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Add run tests
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Refactor
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Support construction from an arbitrary iterable
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Test remove
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Add test case for pop
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Add initial vec[t] run tests
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Add test cases for optional items
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Start adding nested vec test cases
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Don't support vec[...] | None as item type, to match runtime
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Allow empty vec[t] and vec[t | None] to be represented with a NULL buf
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Use the latest alloc API that accepts capacity as well
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Make operator assignment faster
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Add some checks for vec item types (incomplete)
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Check vec item types during construction
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Enable nested vec test cases
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Fix step size calculation for nested vecs
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Enable test cases
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Fix tests after rebase
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Support nested vec pop
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Add tests for double nested vecs
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Test nested vec[i64]
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Add tests
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Support negative indexes
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Update irbuild tests for negative indexing
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Detect additional invalid vec item types
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Support final vec values
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Test vec as default argument value
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Test vec as tuple item
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Fix wrapper functions
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Fix memory corruption bug
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Fix vec argument type checking in wrapper functions
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Update to work with the latest vec implementation
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Only import vec capsule if needed
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Fix self check
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WIP add failing test
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Support fast list vec comprehensions (from list/tuple)
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Support fast comprehensions iterating over vecs
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Support additional item types in vec creation
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Support append with additional item types
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Support pop with additional item types
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Support additional item types with remove
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Support slicing with additional item types
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Support construction of vec with misc item types from a list expression
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Test for loop over vec[float]
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Fix vec item size calculation and update tests
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Update tests
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Fix nested vecs and boxing vecs
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Fix vec unboxing with additional item types
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Fix vec remove
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Minimal runtime support for new vec item types (no tests)
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Add a run test for additional item types
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Add run test case
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Add run tests
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Fixes to nested vecs with specialized item types
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Test unboxing
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Test for loop
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Add comprehension tests
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Fix duplicate visit_set_element methods after rebase
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Fix issues due to rebase
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Fix self check errors
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Fix self check
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Update irbuild tests to pass
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Update some vec irbuild test outputs
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Fix a few vec test failures
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Update a few vec irbuild test outputs
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Update a few vec tests
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WIP update symbolic link to vecs.h
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Update vecs.h references to librt_vecs.h
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Remove temporary vecs.pyi
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Remove redundant vecs stub
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Update vecs references in mypy to librt.vecs
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Update vecs references in mypyc to librt.vecs
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Fix mypyc self check
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Fix irbuild tests
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Fix vec capsule in generated code (WIP)
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Steal first arg of pop and remove
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Fix vec[i64] run tests using primitives
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Fix slicing that returns an empty vec
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Fix additional vec run tests
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Fix nested vec run tests
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Fix more tests
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Fix more tests
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Rename some test files
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Fix issues caused by rebase
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Revert test fixture change
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Lint
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Move to a more standard capsule mechanism
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Delete unused vecusage module and tests
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Fix attribute type capsule deps
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WIP fix 32-bit
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WIP
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WIP
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ircheck: Allow pointer arithmetic even though it's unsigned + signed
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Lint
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Add range check helper and int coercion to ssize_t
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Coerce set item index to ssize_t
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Remove temporary test case
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Also coerce on get item
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WIP
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WIP
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WIP
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WIP
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WIP
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WIP
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WIP attempt at fixing 32-bit issue
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WIP Fix 32-bit
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[mypyc] Support isinstance with librt.vecs.vec objects
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Test unions with vec[i64]
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Remove unused 'struct_type' attr
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Add primitive for isinstance(x, vec)
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Minor cleanup
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Restore deleted tests due to bad merge
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Minor clarifications
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Add missing librt_vercs_ops.py file
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Fix primitive dep
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Move function to extra ops header
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Fix vec pop with optional item type
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Fix after rebase
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Lint
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Remove commented out code
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Remove unused param
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WIP temporarily delete vec run tests
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WIP temporarily delete various irbuild vec tests
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WIP delete tests from test runners
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WIP delete codegen related changes temporarily
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WIP temporarily revert changes to refcount.test
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Minor tweaks
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Fix typo
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Commits

Commits on Feb 2, 2026