Index: include/llvm/BinaryFormat/Wasm.h
===================================================================
--- include/llvm/BinaryFormat/Wasm.h
+++ include/llvm/BinaryFormat/Wasm.h
@@ -191,6 +191,7 @@
   WASM_TYPE_I64 = 0x7E,
   WASM_TYPE_F32 = 0x7D,
   WASM_TYPE_F64 = 0x7C,
+  WASM_TYPE_V128 = 0x7B,
   WASM_TYPE_ANYFUNC = 0x70,
   WASM_TYPE_EXCEPT_REF = 0x68,
   WASM_TYPE_FUNC = 0x60,
@@ -225,6 +226,7 @@
   I64 = WASM_TYPE_I64,
   F32 = WASM_TYPE_F32,
   F64 = WASM_TYPE_F64,
+  V128 = WASM_TYPE_V128,
   EXCEPT_REF = WASM_TYPE_EXCEPT_REF,
 };
 
Index: lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp
===================================================================
--- lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp
+++ lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp
@@ -269,6 +269,8 @@
     return "f32";
   case wasm::ValType::F64:
     return "f64";
+  case wasm::ValType::V128:
+    return "v128";
   case wasm::ValType::EXCEPT_REF:
     return "except_ref";
   }
Index: lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp
===================================================================
--- lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp
+++ lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp
@@ -133,6 +133,13 @@
     return wasm::ValType::F32;
   case MVT::f64:
     return wasm::ValType::F64;
+  case MVT::v16i8:
+  case MVT::v8i16:
+  case MVT::v4i32:
+  case MVT::v2i64:
+  case MVT::v4f32:
+  case MVT::v2f64:
+    return wasm::ValType::V128;
   case MVT::ExceptRef:
     return wasm::ValType::EXCEPT_REF;
   default:
Index: lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
===================================================================
--- lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
+++ lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
@@ -149,6 +149,8 @@
     return wasm::ValType::F32;
   if (RC == &WebAssembly::F64RegClass)
     return wasm::ValType::F64;
+  if (RC == &WebAssembly::V128RegClass)
+    return wasm::ValType::V128;
   llvm_unreachable("Unexpected register class");
 }