Index: Python/ceval.c
===================================================================
--- Python/ceval.c	(revision 68762)
+++ Python/ceval.c	(working copy)
@@ -1705,7 +1705,7 @@
 					created when the exception was caught, otherwise
 					the stack will be in an inconsistent state. */
 					PyTryBlock *b = PyFrame_BlockPop(f);
-					if (b->b_type != EXCEPT_HANDLER) {
+					if (unlikely(b->b_type != EXCEPT_HANDLER)) {
 						PyErr_SetString(PyExc_SystemError,
 							"popped block is not an except handler");
 						why = WHY_EXCEPTION;
@@ -1716,14 +1716,14 @@
 					}
 				}
 			}
-			else if (PyExceptionClass_Check(v)) {
+			else if likely(PyExceptionClass_Check(v)) {
 				w = POP();
 				u = POP();
 				PyErr_Restore(v, w, u);
 				why = WHY_RERAISE;
 				break;
 			}
-			else if (v != Py_None) {
+			else if (unlikely(v != Py_None)) {
 				PyErr_SetString(PyExc_SystemError,
 					"'finally' pops bad exception");
 				why = WHY_EXCEPTION;