Index: include/llvm/IR/IntrinsicsWebAssembly.td
===================================================================
--- include/llvm/IR/IntrinsicsWebAssembly.td
+++ include/llvm/IR/IntrinsicsWebAssembly.td
@@ -40,7 +40,7 @@
 
 // throw / rethrow
 def int_wasm_throw : Intrinsic<[], [llvm_i32_ty, llvm_ptr_ty],
-                               [Throws, IntrNoReturn]>;
+                               [Throws, IntrNoReturn, ImmArg<0>]>;
 def int_wasm_rethrow_in_catch : Intrinsic<[], [], [Throws, IntrNoReturn]>;
 
 // Since wasm does not use landingpad instructions, these instructions return
@@ -58,7 +58,7 @@
 // by WasmEHPrepare pass to generate landingpad table in EHStreamer. This is
 // used in order to give them the indices in WasmEHPrepare.
 def int_wasm_landingpad_index: Intrinsic<[], [llvm_token_ty, llvm_i32_ty],
-                                         [IntrNoMem]>;
+                                         [IntrNoMem, ImmArg<1>]>;
 
 // Returns LSDA address of the current function.
 def int_wasm_lsda : Intrinsic<[llvm_ptr_ty], [], [IntrNoMem]>;
@@ -118,10 +118,10 @@
   Intrinsic<[],
             [llvm_i32_ty, llvm_i32_ty, llvm_ptr_ty, llvm_i32_ty, llvm_i32_ty],
             [IntrWriteMem, IntrInaccessibleMemOrArgMemOnly, WriteOnly<2>,
-             IntrHasSideEffects]>;
+             IntrHasSideEffects, ImmArg<0>, ImmArg<1>]>;
 def int_wasm_data_drop :
   Intrinsic<[],
             [llvm_i32_ty],
-            [IntrNoDuplicate, IntrHasSideEffects]>;
+            [IntrNoDuplicate, IntrHasSideEffects, ImmArg<0>]>;
 
 } // TargetPrefix = "wasm"
Index: test/CodeGen/WebAssembly/wasmehprepare.ll
===================================================================
--- test/CodeGen/WebAssembly/wasmehprepare.ll
+++ test/CodeGen/WebAssembly/wasmehprepare.ll
@@ -405,6 +405,6 @@
 declare void @__cxa_end_catch()
 declare void @__clang_call_terminate(i8*)
 
-; CHECK-DAG: declare void @llvm.wasm.landingpad.index(token, i32)
+; CHECK-DAG: declare void @llvm.wasm.landingpad.index(token, i32 immarg)
 ; CHECK-DAG: declare i8* @llvm.wasm.lsda()
 ; CHECK-DAG: declare i32 @_Unwind_CallPersonality(i8*)