Index: include/clang/Basic/BuiltinsWebAssembly.def
===================================================================
--- include/clang/Basic/BuiltinsWebAssembly.def
+++ include/clang/Basic/BuiltinsWebAssembly.def
@@ -23,6 +23,5 @@
 
 // Exception handling builtins.
 BUILTIN(__builtin_wasm_throw, "vUiv*", "r")
-BUILTIN(__builtin_wasm_rethrow, "v", "r")
 
 #undef BUILTIN
Index: lib/CodeGen/CGBuiltin.cpp
===================================================================
--- lib/CodeGen/CGBuiltin.cpp
+++ lib/CodeGen/CGBuiltin.cpp
@@ -9574,10 +9574,6 @@
     Value *Callee = CGM.getIntrinsic(Intrinsic::wasm_throw);
     return Builder.CreateCall(Callee, {Tag, Obj});
   }
-  case WebAssembly::BI__builtin_wasm_rethrow: {
-    Value *Callee = CGM.getIntrinsic(Intrinsic::wasm_rethrow);
-    return Builder.CreateCall(Callee);
-  }
 
   default:
     return nullptr;
Index: test/CodeGen/builtins-wasm.c
===================================================================
--- test/CodeGen/builtins-wasm.c
+++ test/CodeGen/builtins-wasm.c
@@ -20,9 +20,3 @@
 // WEBASSEMBLY32: call void @llvm.wasm.throw(i32 %{{.*}}, i8* %{{.*}})
 // WEBASSEMBLY64: call void @llvm.wasm.throw(i32 %{{.*}}, i8* %{{.*}})
 }
-
-void f4() {
-  return __builtin_wasm_rethrow();
-// WEBASSEMBLY32: call void @llvm.wasm.rethrow()
-// WEBASSEMBLY64: call void @llvm.wasm.rethrow()
-}