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[mypyc] feat: specialize isinstance for tuple of primitive types #19949

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Merged
JukkaL merged 14 commits into from
Sep 30, 2025
Merged

[mypyc] feat: specialize isinstance for tuple of primitive types #19949

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1975746
[mypyc] feat: specialize isinstance for tuple of primitive types
BobTheBuidler Sep 29, 2025
e23d1f1
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Sep 29, 2025
95ee648
fix mypy errs
BobTheBuidler Sep 29, 2025
73f6297
fix: desc is None
BobTheBuidler Sep 29, 2025
7d5b66a
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Sep 29, 2025
ceda7cc
fix type errs
BobTheBuidler Sep 29, 2025
628294d
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Sep 29, 2025
0d51ead
add ir test
BobTheBuidler Sep 29, 2025
3ea6d17
Merge branch 'isinstance-tuple-of-primitives' of https://github.com/B…
BobTheBuidler Sep 29, 2025
8a3a1b2
Update specialize.py
BobTheBuidler Sep 29, 2025
355ceec
flip flop
BobTheBuidler Sep 29, 2025
c29d5cd
add a variety of run test cases
BobTheBuidler Sep 29, 2025
4e1596c
use cast
BobTheBuidler Sep 29, 2025
fa7f46b
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Sep 29, 2025
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32 changes: 18 additions & 14 deletions mypyc/irbuild/specialize.py
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,6 @@
RefExpr,
StrExpr,
SuperExpr,
SymbolNode,
TupleExpr,
Var,
)
Expand Down Expand Up @@ -590,11 +589,11 @@ def translate_isinstance(builder: IRBuilder, expr: CallExpr, callee: RefExpr) ->

obj_expr = expr.args[0]
type_expr = expr.args[1]

if isinstance(type_expr, TupleExpr) and not type_expr.items:
# we can compile this case to a noop
return builder.false()
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if isinstance(type_expr, (RefExpr, TupleExpr)):
builder.types[obj_expr] = AnyType(TypeOfAny.from_error)

Expand All @@ -608,18 +607,21 @@ def translate_isinstance(builder: IRBuilder, expr: CallExpr, callee: RefExpr) ->
return builder.builder.isinstance_helper(obj, irs, expr.line)

if isinstance(type_expr, TupleExpr):
nodes: list[SymbolNode | None] = []
node_names: list[str] = []
for item in type_expr.items:
if not isinstance(item, RefExpr):
return None
if item.node is None:
return None
if item.node.fullname not in nodes:
nodes.append(item.node.fullname)
if item.node.fullname not in node_names:
node_names.append(item.node.fullname)

descs = [isinstance_primitives.get(fullname) for fullname in nodes]

obj = builder.accept(expr.args[0])
descs = [isinstance_primitives.get(fullname) for fullname in node_names]
if None in descs:
# not all types are primitive types, abort
return None

obj = builder.accept(obj_expr)

retval = Register(bool_rprimitive)
pass_block = BasicBlock()
Expand All @@ -628,9 +630,11 @@ def translate_isinstance(builder: IRBuilder, expr: CallExpr, callee: RefExpr) ->

# Chain the checks: if any succeed, jump to pass_block; else, continue
for i, desc in enumerate(descs):
is_last = (i == len(descs) - 1)
is_last = i == len(descs) - 1
next_block = fail_block if is_last else BasicBlock()
builder.add_bool_branch(builder.primitive_op(desc, [obj], expr.line), pass_block, next_block)
builder.add_bool_branch(
builder.primitive_op(desc, [obj], expr.line), pass_block, next_block
)
if not is_last:
builder.activate_block(next_block)

Expand All @@ -648,12 +652,12 @@ def translate_isinstance(builder: IRBuilder, expr: CallExpr, callee: RefExpr) ->
builder.activate_block(exit_block)
return retval

if isinstance(expr.args[1], RefExpr):
node = expr.args[1].node
if isinstance(type_expr, RefExpr):
node = type_expr.node
if node:
desc = isinstance_primitives.get(node.fullname)
if desc:
obj = builder.accept(expr.args[0])
obj = builder.accept(obj_expr)
return builder.primitive_op(desc, [obj], expr.line)

return None
Expand Down
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