release GIL in constant folding pass

Author: LittleHeroZZZX

paddle/fluid/pir/transforms/general/constant_folding_pass.cc

@@ -51,6 +51,7 @@
 #include "paddle/pir/include/pattern_rewrite/frozen_rewrite_pattern_set.h"
 #include "paddle/pir/include/pattern_rewrite/pattern_match.h"
 #include "paddle/pir/include/pattern_rewrite/pattern_rewrite_driver.h"
+#include "pybind11/gil.h"
 
 namespace {
 
@@ -535,6 +536,13 @@ class ConstantFoldingPass : public pir::Pass {
     pir::GreedyRewriteConfig cfg;
     cfg.use_top_down_traversal = true;
     cfg.max_iterations = 10;
+
+#if !defined(PADDLE_NO_PYTHON)
+    if (PyGILState_Check()) {
+      pybind11::gil_scoped_release release;
+    }
+#endif
+
     auto [_, num_rewrites] = pir::ApplyPatternsGreedily(op, patterns_, cfg);
     AddStatistics(num_rewrites, num_ops);
   }