Align call-init frame flow and spec cache atomic ordering

youknowone · youknowone · commit 94e8d54731b8 · 2026-03-19T22:13:28.000+09:00
diff --git a/crates/vm/src/frame.rs b/crates/vm/src/frame.rs
@@ -4784,9 +4784,8 @@ impl ExecutingFrame<'_> {
                     ) {
                         return self.execute_call_vectorcall(nargs, vm);
                     }
-                    // CPython creates `_Py_InitCleanup` + `__init__` frames here.
-                    // Keep the guard conservative and deopt when the effective
-                    // recursion budget for those two frames is not available.
+                    // Two frames are created: `_Py_InitCleanup` + `__init__`.
+                    // Guard recursion limit accordingly and fall back.
                     if self.specialization_call_recursion_guard_with_extra_frames(vm, 1) {
                         return self.execute_call_vectorcall(nargs, vm);
                     }

Original file line number	Diff line number	Diff line change
`@@ -4784,9 +4784,8 @@ impl ExecutingFrame<'_> {`
`4784`	`4784`	`) {`
`4785`	`4785`	`return self.execute_call_vectorcall(nargs, vm);`
`4786`	`4786`	`}`
`4787`		- // CPython creates `_Py_InitCleanup` + `__init__` frames here.
`4788`		`- // Keep the guard conservative and deopt when the effective`
`4789`		`- // recursion budget for those two frames is not available.`
	`4787`	+ // Two frames are created: `_Py_InitCleanup` + `__init__`.
	`4788`	`+ // Guard recursion limit accordingly and fall back.`
`4790`	`4789`	`if self.specialization_call_recursion_guard_with_extra_frames(vm, 1) {`
`4791`	`4790`	`return self.execute_call_vectorcall(nargs, vm);`
`4792`	`4791`	`}`