cherry-pick from feature/anakin-engine: Anakin support facebox PaddlePaddle#16111

Author: NHZlX

paddle/fluid/framework/ir/CMakeLists.txt

@@ -71,6 +71,7 @@ pass_library(transpose_flatten_concat_fuse_pass inference)
 pass_library(identity_scale_op_clean_pass base)
 pass_library(sync_batch_norm_pass base)
 pass_library(runtime_context_cache_pass base)
+pass_library(simplify_anakin_detection_pattern_pass inference)
 
 # There may be many transpose-flatten structures in a model, and the output of
 # these structures will be used as inputs to the concat Op. This pattern will
@@ -81,6 +82,10 @@ foreach (index RANGE 3 6)
    file(APPEND ${pass_file} "USE_PASS(transpose_flatten${index}_concat_fuse_pass);\n")
 endforeach()
 
+foreach (index RANGE 3 6)
+   file(APPEND ${pass_file} "USE_PASS(simplify_anakin_detection_pattern_pass${index});\n")
+endforeach()
+
 if(WITH_MKLDNN)
     pass_library(mkldnn_placement_pass base mkldnn)
     pass_library(depthwise_conv_mkldnn_pass base mkldnn)

paddle/fluid/framework/ir/graph_pattern_detector.cc

@@ -1454,6 +1454,136 @@ PDNode *patterns::TransposeFlattenConcat::operator()(
   return concat_out;
 }
 
+PDNode *patterns::AnakinDetectionPattern::operator()(
+    std::vector<PDNode *> conv_in, int times) {
+  // The times represents the repeat times of the
+  // {prior_box, prior_box_loc_out, flatten, prior_box_var_out, reshape}
+  const int kNumFields = 7;
+  const int kPriorBoxLocOffset = 1;
+  const int kReshape1Offset = 2;
+  const int kReshape1OutOffset = 3;
+  const int kPriorBoxVarOffset = 4;
+  const int kReshape2Offset = 5;
+  const int kReshape2OutOffset = 6;
+
+  const int kBoxCoderThirdInputOffset = times;
+  const int kMultiClassSecondInputNmsOffset = times + 1;
+
+  std::vector<PDNode *> nodes;
+
+  for (int i = 0; i < times; i++) {
+    nodes.push_back(
+        pattern->NewNode(GetNodeName("prior_box" + std::to_string(i)))
+            ->assert_is_op("density_prior_box"));
+    nodes.push_back(pattern->NewNode(GetNodeName("box_out" + std::to_string(i)))
+                        ->assert_is_op_output("density_prior_box", "Boxes")
+                        ->assert_is_op_input("reshape2", "X")
+                        ->AsIntermediate());
+    nodes.push_back(
+        pattern->NewNode(GetNodeName("reshape1" + std::to_string(i)))
+            ->assert_is_op("reshape2"));
+
+    nodes.push_back(
+        pattern->NewNode(GetNodeName("reshape1_out" + std::to_string(i)))
+            ->assert_is_op_output("reshape2")
+            ->assert_is_op_nth_input("concat", "X", i)
+            ->AsIntermediate());
+
+    nodes.push_back(
+        pattern->NewNode(GetNodeName("box_var_out" + std::to_string(i)))
+            ->assert_is_op_output("density_prior_box", "Variances")
+            ->assert_is_op_input("reshape2", "X")
+            ->AsIntermediate());
+    nodes.push_back(
+        pattern->NewNode(GetNodeName("reshape2" + std::to_string(i)))
+            ->assert_is_op("reshape2"));
+
+    nodes.push_back(
+        pattern->NewNode(GetNodeName("reshape2_out" + std::to_string(i)))
+            ->assert_is_op_output("reshape2")
+            ->assert_is_op_nth_input("concat", "X", i)
+            ->AsIntermediate());
+  }
+
+  auto concat_op1 = pattern->NewNode(GetNodeName("concat1"))
+                        ->assert_is_op("concat")
+                        ->assert_op_has_n_inputs("concat", times);
+  auto concat_out1 = pattern->NewNode(GetNodeName("concat1_out"))
+                         ->assert_is_op_output("concat")
+                         ->AsIntermediate();
+
+  auto concat_op2 = pattern->NewNode(GetNodeName("concat2"))
+                        ->assert_is_op("concat")
+                        ->assert_op_has_n_inputs("concat", times);
+  auto concat_out2 = pattern->NewNode(GetNodeName("concat2_out"))
+                         ->assert_is_op_output("concat")
+                         ->AsIntermediate();
+
+  auto box_coder_op = pattern->NewNode(GetNodeName("box_coder"))
+                          ->assert_is_op("box_coder")
+                          ->assert_op_has_n_inputs("box_coder", 3);
+
+  auto box_coder_out = pattern->NewNode(GetNodeName("box_coder_out"))
+                           ->assert_is_op_output("box_coder")
+                           ->AsIntermediate();
+
+  auto multiclass_nms_op = pattern->NewNode(GetNodeName("multiclass_nms"))
+                               ->assert_is_op("multiclass_nms")
+                               ->assert_op_has_n_inputs("multiclass_nms", 2);
+
+  auto multiclass_nms_out = pattern->NewNode(GetNodeName("multiclass_nms_out"))
+                                ->assert_is_op_output("multiclass_nms")
+                                ->AsOutput();
+
+  std::vector<PDNode *> reshape1_outs;
+  std::vector<PDNode *> reshape2_outs;
+
+  for (int i = 0; i < times; i++) {
+    conv_in[i]->AsInput();
+    // prior_box
+    nodes[i * kNumFields]->LinksFrom({conv_in[i]});
+    // prior_box box out
+    nodes[i * kNumFields + kPriorBoxLocOffset]->LinksFrom(
+        {nodes[i * kNumFields]});
+    // reshape
+    nodes[i * kNumFields + kReshape1Offset]->LinksFrom(
+        {nodes[i * kNumFields + kPriorBoxLocOffset]});
+    // reshape_out
+    nodes[i * kNumFields + kReshape1OutOffset]->LinksFrom(
+        {nodes[i * kNumFields + kReshape1Offset]});
+
+    nodes[i * kNumFields + kPriorBoxVarOffset]->LinksFrom(
+        {nodes[i * kNumFields]});
+    // reshape
+    nodes[i * kNumFields + kReshape2Offset]->LinksFrom(
+        {nodes[i * kNumFields + kPriorBoxVarOffset]});
+    // reshape_out
+    nodes[i * kNumFields + kReshape2OutOffset]->LinksFrom(
+        {nodes[i * kNumFields + kReshape2Offset]});
+
+    reshape1_outs.push_back(nodes[i * kNumFields + kReshape1OutOffset]);
+    reshape2_outs.push_back(nodes[i * kNumFields + kReshape2OutOffset]);
+  }
+
+  concat_op1->LinksFrom(reshape1_outs);
+  concat_op2->LinksFrom(reshape2_outs);
+  concat_out1->LinksFrom({concat_op1});
+  concat_out2->LinksFrom({concat_op2});
+
+  conv_in[kBoxCoderThirdInputOffset]->AsInput();
+  conv_in[kMultiClassSecondInputNmsOffset]->AsInput();
+
+  box_coder_op->LinksFrom(
+      {concat_out1, concat_out2, conv_in[kBoxCoderThirdInputOffset]});
+  box_coder_out->LinksFrom({box_coder_op});
+
+  multiclass_nms_op
+      ->LinksFrom({box_coder_out, conv_in[kMultiClassSecondInputNmsOffset]})
+      .LinksTo({multiclass_nms_out});
+
+  return multiclass_nms_out;
+}
+
 }  // namespace ir
 }  // namespace framework
 }  // namespace paddle

paddle/fluid/framework/ir/graph_pattern_detector.h

@@ -841,6 +841,21 @@ struct TransposeFlattenConcat : public PatternBase {
   }
 };
 
+struct AnakinDetectionPattern : public PatternBase {
+  AnakinDetectionPattern(PDPattern* pattern, const std::string& name_scope)
+      : PatternBase(pattern, name_scope, "anakin_detect_pattern") {}
+
+  PDNode* operator()(std::vector<PDNode*> conv_inputs, int times);
+
+  std::string GetNodeName(const std::string& op_type) {
+    return PDNodeName(name_scope_, repr_, id_, op_type);
+  }
+
+  PDNode* GetPDNode(const std::string& op_type) {
+    return pattern->RetrieveNode(GetNodeName(op_type));
+  }
+};
+
 }  // namespace patterns
 
 // Link two ir::Nodes from each other.