fix some compiler warning

Author: luotao1

paddle/fluid/framework/ir/attention_lstm_fuse_pass.cc

@@ -262,7 +262,7 @@ std::unique_ptr<ir::Graph> AttentionLSTMFusePass::ApplyImpl(
   std::unordered_set<std::string> specified_vars({"data_lod_attention",
                                                   "cell_init", "hidden_init",
                                                   "data", "week", "minute"});
-  int count = 0;
+  size_t count = 0;
   for (auto* node : graph->Nodes()) {
     if (node->IsVar() && specified_vars.count(node->Name())) {
       ++count;

paddle/fluid/framework/program_desc.cc

@@ -126,7 +126,7 @@ const std::vector<std::string> ProgramDesc::GetFeedTargetNames() {
   std::vector<std::string> feed_target_names;
   for (auto *op : global_block.AllOps()) {
     if (op->Type() == kFeedOpType) {
-      int col = boost::get<int>(op->GetAttr("col"));
+      size_t col = boost::get<int>(op->GetAttr("col"));
       if (col >= feed_target_names.size()) {
         feed_target_names.resize(col + 1);
       }
@@ -143,7 +143,7 @@ const std::vector<std::string> ProgramDesc::GetFetchTargetNames() {
   std::vector<std::string> fetch_target_names;
   for (auto *op : global_block.AllOps()) {
     if (op->Type() == kFetchOpType) {
-      int col = boost::get<int>(op->GetAttr("col"));
+      size_t col = boost::get<int>(op->GetAttr("col"));
       if (col >= fetch_target_names.size()) {
         fetch_target_names.resize(col + 1);
       }

paddle/fluid/framework/reader_test.cc

@@ -39,7 +39,7 @@ TEST(READER, decorate_chain) {
   {
     auto endpoints = root->GetEndPoints();
     ASSERT_EQ(endpoints.size(), 2U);
-    ASSERT_NE(endpoints.count(end_point1.get()), 0);
+    ASSERT_NE(endpoints.count(end_point1.get()), 0UL);
     ASSERT_NE(endpoints.count(end_point2.get()), 0);
   }
 

paddle/fluid/framework/selected_rows_test.cc

@@ -91,7 +91,7 @@ TEST(SelectedRows, SparseTable) {
   ASSERT_TRUE(table.HasKey(10));
   ASSERT_TRUE(table.HasKey(8));
   ASSERT_TRUE(table.HasKey(6));
-  ASSERT_EQ(table.rows().size(), 3);
+  ASSERT_EQ(table.rows().size(), 3UL);
 
   framework::Tensor ids;
   ids.Resize(framework::make_ddim({4}));

paddle/fluid/operators/reader/reader_blocking_queue_test.cc

@@ -229,7 +229,7 @@ TEST(BlockingQueue, speed_test_mode) {
     q1.Receive(&b);
     EXPECT_EQ(b, i);
   }
-  EXPECT_EQ(q1.Size(), 0);
+  EXPECT_EQ(q1.Size(), 0UL);
 
   BlockingQueue<size_t> q2(queue_size, true);
   for (size_t i = 0; i < queue_size; ++i) {

paddle/fluid/operators/sequence_unpad_op.cc

@@ -50,7 +50,7 @@ class SequenceUnpadOp : public framework::OperatorWithKernel {
     if (x_dims.size() == 2) {
       out_dims_vec.push_back(1);
     } else {
-      for (size_t i = 2; i < x_dims.size(); ++i) {
+      for (int i = 2; i < x_dims.size(); ++i) {
         out_dims_vec.push_back(x_dims[i]);
       }
     }

paddle/fluid/operators/sequence_unpad_op.h

@@ -61,7 +61,7 @@ class SequenceUnpadOpKernel : public framework::OpKernel<T> {
     if (x_t->dims().size() == 2) {
       out_dims_vec.push_back(1);
     } else {
-      for (size_t i = 2; i < x_t->dims().size(); ++i) {
+      for (int i = 2; i < x_t->dims().size(); ++i) {
         out_dims_vec.push_back(x_t->dims()[i]);
       }
     }