Merge pull request #41645 from aschwaighofer/swift_supsend_dispatch_rename

IRGen: Use the current function name for the swift_suspend_dispatch thunk

Author: aschwaighofer

lib/IRGen/GenFunc.cpp

@@ -2366,8 +2366,7 @@ IRGenFunction::createAsyncDispatchFn(const FunctionPointer &fnPtr,
   auto *dispatchFnTy =
       llvm::FunctionType::get(IGM.VoidTy, argTys, false /*vaargs*/);
   llvm::SmallString<40> name;
-  llvm::raw_svector_ostream(name)
-      << "__swift_suspend_dispatch_" << argTypes.size();
+  llvm::raw_svector_ostream(name) << CurFn->getName() << ".0";
   llvm::Function *dispatch =
       llvm::Function::Create(dispatchFnTy, llvm::Function::InternalLinkage,
                              llvm::StringRef(name), &IGM.Module);

test/IRGen/async/get_async_continuation.sil

@@ -72,7 +72,7 @@ bb0:
 // CHECK:      {{musttail call swifttailcc|tail call swiftcc}} void @swift_continuation_await(%swift.continuation_context* %0)
 // CHECK-NEXT: ret void
 
-// CHECK: define {{.*}} void @__swift_suspend_dispatch_1(i8* %0, %swift.context* %1)
+// CHECK: define {{.*}} void @async_continuation.0(i8* %0, %swift.context* %1)
 // CHECK-NOT: define
 // CHECK:  tail call swift{{(tail)?}}cc void %{{.*}}(%swift.context* swiftasync %1)
 // CHECK-NEXT:  ret void