[wasm] implement simd lowering for replaceLane, load, store and test for phi

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 190 matching lines @@
   void Int64LoweringForTesting();
 
   void SimdScalarLoweringForTesting();
 
   void SetSourcePosition(Node* node, wasm::WasmCodePosition position);
 
   Node* CreateS128Value(int32_t value);
 
   Node* SimdOp(wasm::WasmOpcode opcode, const NodeVector& inputs);
   Node* SimdExtractLane(wasm::WasmOpcode opcode, uint8_t lane, Node* input);
+  Node* SimdReplaceLane(wasm::WasmOpcode opcode, uint8_t lane, Node* input,
+                        Node* replacement);
 
  private:
   static const int kDefaultBufferSize = 16;
   friend class WasmTrapHelper;
 
   Zone* zone_;
   JSGraph* jsgraph_;
   wasm::ModuleEnv* module_;
   Node* mem_buffer_;
   Node* mem_size_;
@@ skipping 130 matching lines @@
   }
 
   int AddParameterNodes(Node** args, int pos, int param_count,
                         wasm::FunctionSig* sig);
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_WASM_COMPILER_H_