Remove adaptivity when specialization is impossible

Author: sweeneyde

Python/specialize.c

@@ -1569,7 +1569,9 @@ _Py_Specialize_CompareOp(PyObject *lhs, PyObject *rhs,
     int op = adaptive->original_oparg;
     int next_opcode = _Py_OPCODE(instr[1]);
     if (next_opcode != POP_JUMP_IF_FALSE && next_opcode != POP_JUMP_IF_TRUE) {
+        // Can't ever combine, so don't don't bother being adaptive.
         SPECIALIZATION_FAIL(COMPARE_OP, SPEC_FAIL_NOT_FOLLOWED_BY_COND_JUMP);
+        *instr = _Py_MAKECODEUNIT(COMPARE_OP, adaptive->original_oparg);
         goto failure;
     }
     assert(op <= Py_GE);