GH-129715: Remove _DYNAMIC_EXIT (GH-129716)

Author: brandtbucher

Include/cpython/pystats.h

@@ -129,6 +129,7 @@ typedef struct _optimization_stats {
     uint64_t inner_loop;
     uint64_t recursive_call;
     uint64_t low_confidence;
+    uint64_t unknown_callee;
     uint64_t executors_invalidated;
     UOpStats opcode[PYSTATS_MAX_UOP_ID + 1];
     uint64_t unsupported_opcode[256];

Include/internal/pycore_optimizer.h

@@ -289,8 +289,7 @@ static inline int is_terminator(const _PyUOpInstruction *uop)
     int opcode = uop->opcode;
     return (
         opcode == _EXIT_TRACE ||
-        opcode == _JUMP_TO_TOP ||
-        opcode == _DYNAMIC_EXIT
+        opcode == _JUMP_TO_TOP
     );
 }
 

Include/internal/pycore_uop_ids.h

@@ -1160,6 +1160,7 @@ def testfunc(n):
         self.assertIsNotNone(ex)
         self.assertIn("_RETURN_GENERATOR", get_opnames(ex))
 
+    @unittest.skip("Tracing into generators currently isn't supported.")
     def test_for_iter_gen(self):
         def gen(n):
             for i in range(n):

Include/internal/pycore_uop_metadata.h

@@ -0,0 +1 @@
+Improve JIT performance for generators.