Initial commit: add .gitignore and README

.venv/lib/python3.12/site-packages/mypyc/analysis/capsule_deps.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from mypyc.ir.func_ir import FuncIR
+from mypyc.ir.ops import CallC, PrimitiveOp
+
+
+def find_implicit_capsule_dependencies(fn: FuncIR) -> set[str] | None:
+    """Find implicit dependencies on capsules that need to be imported.
+
+    Using primitives or types defined in librt submodules such as "librt.base64"
+    requires a capsule import.
+
+    Note that a module can depend on a librt module even if it doesn't explicitly
+    import it, for example via re-exported names or via return types of functions
+    defined in other modules.
+    """
+    deps: set[str] | None = None
+    for block in fn.blocks:
+        for op in block.ops:
+            # TODO: Also determine implicit type object dependencies (e.g. cast targets)
+            if isinstance(op, CallC) and op.capsule is not None:
+                if deps is None:
+                    deps = set()
+                deps.add(op.capsule)
+            else:
+                assert not isinstance(op, PrimitiveOp), "Lowered IR is expected"
+    return deps