Index: include/llvm/IR/Intrinsics.td
===================================================================
--- include/llvm/IR/Intrinsics.td
+++ include/llvm/IR/Intrinsics.td
@@ -585,6 +585,28 @@
                                 [llvm_token_ty, llvm_i32_ty, llvm_i32_ty],
                                 [IntrReadMem]>;
 
+//===------------------------ Coroutine Intrinsics ---------------===//
+// These are documented in docs/Coroutines.rst
+
+def int_experimental_coro_init : Intrinsic<[llvm_ptr_ty], 
+                                           [llvm_ptr_ty, llvm_i32_ty, 
+                                            llvm_ptr_ty, llvm_ptr_ty], []>;
+def int_experimental_coro_fork : Intrinsic<[llvm_i1_ty], [], []>;
+def int_experimental_coro_frame : Intrinsic<[llvm_ptr_ty], [], []>;
+def int_experimental_coro_size : Intrinsic<[llvm_anyint_ty], [], [IntrNoMem]>;
+
+def int_experimental_coro_resume_end : Intrinsic<[], [], []>;
+def int_experimental_coro_elide : Intrinsic<[llvm_ptr_ty], [], []>;
+def int_experimental_coro_delete : Intrinsic<[llvm_ptr_ty], [llvm_ptr_ty], []>;
+
+def int_experimental_coro_save : Intrinsic<[llvm_token_ty], [], []>;
+def int_experimental_coro_suspend : Intrinsic<[llvm_i1_ty], [llvm_token_ty, llvm_i1_ty], []>;
+
+def int_experimental_coro_resume : Intrinsic<[], [llvm_ptr_ty], [Throws]>;
+def int_experimental_coro_destroy : Intrinsic<[], [llvm_ptr_ty], [Throws]>;
+def int_experimental_coro_done : Intrinsic<[llvm_i1_ty], [llvm_ptr_ty], [IntrReadMem]>;
+def int_experimental_coro_promise : Intrinsic<[llvm_anyptr_ty], [llvm_ptr_ty], [IntrReadMem]>;
+def int_experimental_coro_from_promise : Intrinsic<[llvm_ptr_ty], [llvm_anyptr_ty], [IntrReadMem]>;
 //===-------------------------- Other Intrinsics --------------------------===//
 //
 def int_flt_rounds : Intrinsic<[llvm_i32_ty]>,