refactor(mgb/build): remove MGB_ENABLE_IMPERATIVE macro

GitOrigin-RevId: 94a40798ab49ac7e046ae6d9ab7fd47850e2e249

CMakeLists.txt

@@ -295,7 +295,6 @@ if(MGE_WITH_TEST)
 endif()
 
 if(MGE_BUILD_IMPERATIVE_RT)
-    add_compile_definitions(MGB_ENABLE_IMPERATIVE_RUNTIME)
     set(CMAKE_CXX_STANDARD 17)
 endif()
 
@@ -711,7 +710,6 @@ endif()
 
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${MARCH}")
 
-set(MGB_ENABLE_IMPERATIVE ${MGE_BUILD_IMPERATIVE_RT})
 # Write out megbrain_build_config.h
 # It defines macros needed by both megbrain and dnn
 configure_file(src/megbrain_build_config.h.in ${CMAKE_CURRENT_BINARY_DIR}/genfiles/megbrain_build_config.h)

src/core/impl/graph/cg_impl.h

@@ -125,9 +125,7 @@ public:
     template<typename T> static ComputingGraphImpl* downcast(T* ptr) = delete;
 
     inline static ComputingGraphImpl* downcast(ComputingGraph* graph) {
-        #ifdef MGB_ENABLE_IMPERATIVE_RUNTIME
         mgb_assert(!graph->options().imperative_proxy_graph);
-        #endif
         return static_cast<ComputingGraphImpl*>(graph);
     }
 

src/megbrain_build_config.h.in

@@ -34,8 +34,6 @@
 #cmakedefine01 MGB_ENABLE_FBS_SERIALIZATION
 #cmakedefine01 MGB_IS_DEV
 
-#cmakedefine01 MGB_ENABLE_IMPERATIVE
-
 // DNN related flags
 // Platform macro's
 #cmakedefine01 MEGDNN_WITH_CUDA

src/opr/impl/dnn/batch_norm.cpp

@@ -140,7 +140,6 @@ void BatchNormForward::scn_do_execute() {
     auto &&y = output(4)->dev_tensor();
     mgb_assert(x.layout().is_contiguous() &&
                y.layout().is_contiguous());
-#if MGB_ENABLE_IMPERATIVE
     if (input().size() == 5) { // need running mean/variance
         auto &&o0 = output(0)->dev_tensor(),
              &&o1 = output(1)->dev_tensor(),
@@ -163,7 +162,6 @@ void BatchNormForward::scn_do_execute() {
                     && o1.raw_ptr() == i1.raw_ptr());
         }
     }
-#endif
     auto scale = input(1)->dev_tensor().as_megdnn();
     auto bias = input(2)->dev_tensor().as_megdnn();
     auto mean = output(0)->dev_tensor().as_megdnn();