move strange control flow detection up

Author: Fidget-Spinner

Python/optimizer.c

@@ -628,6 +628,14 @@ _PyJit_translate_single_bytecode_to_trace(
         goto done;
     }
 
+    // Strange control-flow
+    bool has_dynamic_jump_taken = OPCODE_HAS_UNPREDICTABLE_JUMP(opcode) &&
+        (next_instr != this_instr + 1 + _PyOpcode_Caches[_PyOpcode_Deopt[opcode]]);
+    if (has_dynamic_jump_taken) {
+        DPRINTF(2, "Unsupported: dynamic jump taken\n");
+        goto unsupported;
+    }
+
     /* Special case the first instruction,
     * so that we can guarantee forward progress */
     if (progress_needed && tstate->interp->jit_state.code_curr_size <= 2) {
@@ -638,14 +646,6 @@ _PyJit_translate_single_bytecode_to_trace(
         assert(!OPCODE_HAS_DEOPT(opcode));
     }
 
-    // Strange control-flow
-    bool has_dynamic_jump_taken = OPCODE_HAS_UNPREDICTABLE_JUMP(opcode) &&
-        (next_instr != this_instr + 1 + _PyOpcode_Caches[_PyOpcode_Deopt[opcode]]);
-    if (has_dynamic_jump_taken) {
-        DPRINTF(2, "Unsupported: dynamic jump taken\n");
-        goto unsupported;
-    }
-
     // This happens when a recursive call happens that we can't trace. Such as Python -> C -> Python calls
     // If we haven't guarded the IP, then it's untraceable.
     if (frame != tstate->interp->jit_state.prev_instr_frame && !needs_guard_ip) {