[wasm] Add native x64 implementations for I32x4Splat, I32x4ExtractLane

src/compiler/wasm-compiler.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_WASM_COMPILER_H_
 #define V8_COMPILER_WASM_COMPILER_H_
 
 #include <memory>
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
@@ skipping 176 matching lines @@
   void set_control_ptr(Node** control) { this->control_ = control; }
 
   void set_effect_ptr(Node** effect) { this->effect_ = effect; }
 
   wasm::FunctionSig* GetFunctionSignature() { return function_signature_; }
 
   void Int64LoweringForTesting();
 
   void SetSourcePosition(Node* node, wasm::WasmCodePosition position);
 
+  Node* DefaultS128Value();
+
   Node* SimdOp(wasm::WasmOpcode opcode, const NodeVector& inputs);
 
  private:
   static const int kDefaultBufferSize = 16;
   friend class WasmTrapHelper;
 
   Zone* zone_;
   JSGraph* jsgraph_;
   wasm::ModuleEnv* module_;
   Node* mem_buffer_;
@@ skipping 128 matching lines @@
     Node** buf = Buffer(new_count);
     if (buf != buffer) memcpy(buf, buffer, old_count * sizeof(Node*));
     return buf;
   }
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_WASM_COMPILER_H_