diff --git a/examples/cpp/dot.cpp b/examples/cpp/dot.cpp
index ef73a7581..20b5bc72f 100644
--- a/examples/cpp/dot.cpp
+++ b/examples/cpp/dot.cpp
@@ -49,7 +49,7 @@ perf_t do_bench(triton::driver::stream* stream, bool AT, bool BT, int32_t M, int
   stream->synchronize();
   triton::dnn::dot dot(M, N, K, AT, BT, ty, ty, ty, 8, 8, 8);
   // benchmark triton
-  double triton_ns = triton::tools::bench([&]() { dot.enqueue(stream, {da, db, dc}, triton::dnn::FULL_TUNING);}, stream);
+  double triton_ns = triton::tools::bench([&]() { dot.enqueue(stream, {da, db, dc}, triton::dnn::NO_TUNING);}, stream);
   // benchmark cublas
 //  NumericT alpha = 1;
 //  NumericT beta = 0;
diff --git a/include/triton/runtime/jit.h b/include/triton/runtime/jit.h
index 1cc8c929a..f43f94e8f 100644
--- a/include/triton/runtime/jit.h
+++ b/include/triton/runtime/jit.h
@@ -65,7 +65,7 @@ public:
                       vectorize(&tune),
                       selection(&shmem_allocation, &tune, &shmem_info, &alignment_info, target),
                       optimize_dot(&tune),
-                      optimize_dce(),
+                      dce(),
                       optimize_trans(),
                       alignment_info(),
                       reassociate(&tune, &alignment_info),
@@ -73,9 +73,9 @@ public:
 
     void target_independent(ir::module &module) {
       optimize_dot.run(module);
-      optimize_dce.run(module);
       optimize_trans.run(module);
-      optimize_dce.run(module);
+      dce.run(module);
+//      ir::print(module, std::cout);
     }
 
     void target_dependent(ir::module &module) {
@@ -88,8 +88,7 @@ public:
         shmem_barriers.run(module);
       }
       vectorize.run(module);
-      optimize_dce.run(module);
-//      ir::print(module, std::cout);
+      dce.run(module);
     }
 
     codegen::selection selection;
@@ -101,7 +100,7 @@ public:
     codegen::transform::shmem_barriers shmem_barriers;
     codegen::transform::vectorize vectorize;
     codegen::transform::optimize_dot optimize_dot;
-    codegen::transform::optimize_dce optimize_dce;
+    codegen::transform::optimize_dce dce;
     codegen::transform::optimize_trans optimize_trans;
     codegen::transform::reassociate reassociate;
     codegen::target* target_;
diff --git a/lib/codegen/transform/trans.cpp b/lib/codegen/transform/trans.cpp
index 43cba99b7..4edfa6a59 100644
--- a/lib/codegen/transform/trans.cpp
+++ b/lib/codegen/transform/trans.cpp
@@ -17,10 +17,9 @@ ir::value* optimize_trans::replace_phi(ir::value* value,
       incs.push_back(replace_phi(phi->get_incoming_value(n), builder, perm));
     // create phi for transposed values
     builder.set_insert_point(phi);
-    ir::phi_node* result = builder.create_phi(incs[0]->get_type(), incs.size(), phi->get_name());
+    ir::phi_node* result = builder.create_phi(incs[0]->get_type(), incs.size());
     for(unsigned n = 0; n < phi->get_num_incoming(); n++)
       result->add_incoming(incs[n], phi->get_incoming_block(n));
-    phi->replace_all_uses_with(result);
     return result;
   }
   else if(auto i = dynamic_cast<ir::instruction*>(value)){
@@ -29,7 +28,6 @@ ir::value* optimize_trans::replace_phi(ir::value* value,
     it++;
     builder.set_insert_point(it);
     ir::instruction *trans = (ir::instruction*)builder.create_trans(i, perm);
-    i->replace_all_uses_with(trans);
     trans->set_operand(0, i);
     return trans;
   }
diff --git a/lib/dnn/base.cpp b/lib/dnn/base.cpp
index dae023eef..86d031564 100644
--- a/lib/dnn/base.cpp
+++ b/lib/dnn/base.cpp
@@ -62,8 +62,7 @@ std::pair<base*, rt::jit*> base::get_profile_impl(driver::stream *stream, std::v
       jit->add_module(name_.c_str(), src.c_str(), best.params);
     }
     else{
-//      params_t params = heuristics();
-      params_t params = {4, 2, 16, 4, 4, 16, 2, 2, 1, 1, 1, 8, 64, 8, 8, 1, 4, 2, 1};
+      params_t params = heuristics();
       jit->add_module(name_.c_str(), src.c_str(), params);
     }
     triton::driver::kernel* kernel = jit->get_function(name_.c_str());