[WebAssembly] Add immarg attribute to intrinsics

[aheejin]

Summary

After D57825 (r355981), intrinsic arguments that are immediate values
should be marked as ImmArg.

[tlively]

I didn't know you could do that! Thanks :)

include/llvm/IR/IntrinsicsWebAssembly.td

def int_wasm_trunc_saturate_unsigned : Intrinsic<[llvm_anyint_ty],
                                                  [IntrNoMem, IntrSpeculatable]>;
 
 //===----------------------------------------------------------------------===//
 // Exception handling intrinsics
 //===----------------------------------------------------------------------===//
 
 // 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
 // exception pointer and selector values until we lower them in WasmEHPrepare.
 def int_wasm_get_exception : Intrinsic<[llvm_ptr_ty], [llvm_token_ty],
                                        [IntrHasSideEffects]>;
 def int_wasm_get_ehselector : Intrinsic<[llvm_i32_ty], [llvm_token_ty],
                                         [IntrHasSideEffects]>;
 // This is the same as llvm.wasm.get.exception except that it does not take a
 // token operand. This is only for instruction selection purpose.
 def int_wasm_extract_exception : Intrinsic<[llvm_ptr_ty], [],
                                            [IntrHasSideEffects]>;
 
 // WebAssembly EH must maintain the landingpads in the order assigned to them
 // 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]>;
 
 //===----------------------------------------------------------------------===//
 // Atomic intrinsics
 //===----------------------------------------------------------------------===//
 

 //===----------------------------------------------------------------------===//
 // Bulk memory intrinsics
 //===----------------------------------------------------------------------===//
 
 def int_wasm_memory_init :
   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"

test/CodeGen/WebAssembly/wasmehprepare.ll

 declare i32 @llvm.wasm.get.ehselector(token)
 declare i32 @llvm.eh.typeid.for(i8*)
 declare void @llvm.wasm.throw(i32, i8*)
 declare void @llvm.wasm.rethrow.in.catch()
 declare i8* @__cxa_begin_catch(i8*)
 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*)