[WebAssembly] Add IntrNoReturn property to throw/rethrow intrinsics

Reviewers: dschuff

Subscribers: jfb, sbc100, jgravelle-google, sunfish, llvm-commits

Differential Revision: https://reviews.llvm.org/D43740

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326984 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/IR/IntrinsicsWebAssembly.td

@@ -31,8 +31,12 @@ def int_wasm_mem_grow : Intrinsic<[llvm_anyint_ty],
 def int_wasm_current_memory : Intrinsic<[llvm_anyint_ty], [], [IntrReadMem]>;
 def int_wasm_grow_memory : Intrinsic<[llvm_anyint_ty], [LLVMMatchType<0>], []>;
 
+//===----------------------------------------------------------------------===//
 // Exception handling intrinsics
-def int_wasm_throw: Intrinsic<[], [llvm_i32_ty, llvm_ptr_ty], [Throws]>;
-def int_wasm_rethrow: Intrinsic<[], [], [Throws]>;
+//===----------------------------------------------------------------------===//
 
+// throw / rethrow
+def int_wasm_throw : Intrinsic<[], [llvm_i32_ty, llvm_ptr_ty],
+                               [Throws, IntrNoReturn]>;
+def int_wasm_rethrow : Intrinsic<[], [], [Throws, IntrNoReturn]>;
 }