[PyTorch] Don't inline Dispatcher::call on mobile (pytorch#53197)

Summary:
Pull Request resolved: pytorch#53197

This probably causes a code size blowup and we care more about the size savings than the incremental perf on mobile.
ghstack-source-id: 122977713

Test Plan: buildsizebot some mobile apps

Reviewed By: dhruvbird

Differential Revision: D26731181

fbshipit-source-id: 78a926278a85028af09bfa0731d4d59a55ee3746

Author: swolchok

aten/src/ATen/core/dispatch/Dispatcher.h

@@ -14,6 +14,11 @@
 
 #include <ATen/core/grad_mode.h>
 
+#if C10_MOBILE
+#define C10_DISPATCHER_INLINE_UNLESS_MOBILE inline
+#else
+#define C10_DISPATCHER_INLINE_UNLESS_MOBILE C10_ALWAYS_INLINE
+#endif
 namespace c10 {
 
 class TORCH_API OperatorHandle;
@@ -422,7 +427,7 @@ inline Return Dispatcher::callWithDispatchKeySlowPath(const TypedOperatorHandle<
 }
 
 template<class Return, class... Args>
-C10_ALWAYS_INLINE Return Dispatcher::call(const TypedOperatorHandle<Return(Args...)>& op, Args... args) const {
+C10_DISPATCHER_INLINE_UNLESS_MOBILE Return Dispatcher::call(const TypedOperatorHandle<Return(Args...)>& op, Args... args) const {
   detail::unused_arg_(args...);  // workaround for a false-positive warning about unused parameters in gcc 5
   auto dispatchKeySet = op.operatorDef_->op.dispatchKeyExtractor()
     .template getDispatchKeySetUnboxed<Args...>(