[Framework][Op_regitry]reconstruct op_registry (#3699)

* reconstruct op_registry. test=develop

* remove function GetKernelOffset. test=develop

docs/develop_guides/add_layout.md

@@ -165,9 +165,7 @@ std::set<DataLayoutType> ExpandValidLayouts(DataLayoutType layout) {
 // 该文件第2处
 // 找到文件中的下面的函数
 KernelRegistry::KernelRegistry()
-    : registries_(static_cast<int>(TARGET(NUM)) *
-                  static_cast<int>(PRECISION(NUM)) *
-                  static_cast<int>(DATALAYOUT(NUM)))
+    : registries_() {
 
 // 在该函数中加入新增Layout的下面内容
   INIT_FOR(kOpenCL, kFP16, kNCHW);

lite/core/op_registry.cc

@@ -124,14 +124,11 @@ std::list<std::unique_ptr<KernelBase>> KernelRegistry::Create(
   return std::list<std::unique_ptr<KernelBase>>();
 }
 
-KernelRegistry::KernelRegistry()
-    : registries_(static_cast<int>(TARGET(NUM)) *
-                  static_cast<int>(PRECISION(NUM)) *
-                  static_cast<int>(DATALAYOUT(NUM))) {
+KernelRegistry::KernelRegistry() : registries_() {
 #define INIT_FOR(target__, precision__, layout__)            \
-  registries_[KernelRegistry::GetKernelOffset<TARGET(target__),        \
+  registries_[std::make_tuple(TARGET(target__),              \
                               PRECISION(precision__),        \
-                                              DATALAYOUT(layout__)>()] \
+                              DATALAYOUT(layout__))]         \
       .set<KernelRegistryForTarget<TARGET(target__),         \
                                    PRECISION(precision__),   \
                                    DATALAYOUT(layout__)> *>( \

lite/core/op_registry.h

@@ -332,7 +332,7 @@ class KernelRegistry final {
           &&creator) {
     using kernel_registor_t =
         KernelRegistryForTarget<Target, Precision, Layout>;
-    auto &varient = registries_[GetKernelOffset<Target, Precision, Layout>()];
+    auto &varient = registries_[std::make_tuple(Target, Precision, Layout)];
     auto *reg = varient.template get<kernel_registor_t *>();
     CHECK(reg) << "Can not be empty of " << name;
     reg->Register(name, std::move(creator));
@@ -349,10 +349,12 @@ class KernelRegistry final {
     using kernel_registor_t =
         KernelRegistryForTarget<Target, Precision, Layout>;
     std::list<std::unique_ptr<KernelBase>> kernel_list;
-    if (registries_[GetKernelOffset<Target, Precision, Layout>()].valid()) {
-      kernel_list = registries_[GetKernelOffset<Target, Precision, Layout>()]
-                        .template get<kernel_registor_t *>()
-                        ->Creates(op_type);
+    std::tuple<TargetType, PrecisionType, DataLayoutType> temp_tuple(
+        Target, Precision, Layout);
+    if (registries_[temp_tuple].valid()) {
+      kernel_list =
+          registries_[temp_tuple].template get<kernel_registor_t *>()->Creates(
+              op_type);
     }
     return kernel_list;
   }
@@ -362,18 +364,6 @@ class KernelRegistry final {
                                                 PrecisionType precision,
                                                 DataLayoutType layout);
 
-  // Get a kernel registry offset in all the registries.
-  template <TargetType Target, PrecisionType Precision, DataLayoutType Layout>
-  static int GetKernelOffset() {
-    CHECK_LT(static_cast<int>(Target), static_cast<int>(TARGET(NUM)));
-    CHECK_LT(static_cast<int>(Precision), static_cast<int>(PRECISION(NUM)));
-    CHECK_LT(static_cast<int>(Layout), static_cast<int>(DATALAYOUT(NUM)));
-    return static_cast<int>(Target) * static_cast<int>(PRECISION(NUM)) *
-               static_cast<int>(DATALAYOUT(NUM)) +                            //
-           static_cast<int>(Precision) * static_cast<int>(DATALAYOUT(NUM)) +  //
-           static_cast<int>(Layout);
-  }
-
   std::string DebugString() const {
 #ifndef LITE_ON_MODEL_OPTIMIZE_TOOL
     return "No more debug info";
@@ -404,7 +394,9 @@ class KernelRegistry final {
   }
 
  private:
-  mutable std::vector<any_kernel_registor_t> registries_;
+  mutable std::map<std::tuple<TargetType, PrecisionType, DataLayoutType>,
+                   any_kernel_registor_t>
+      registries_;
 #ifndef LITE_ON_TINY_PUBLISH
   mutable std::map<
       std::string,