[wasm] Int64Lowering of FXXXConvertI64 instructions.

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_
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
 // Do not include anything from src/compiler here!
 #include "src/wasm/wasm-opcodes.h"
@@ skipping 187 matching lines @@
   Node* BuildF64Atan(Node* input);
   Node* BuildF64Cos(Node* input);
   Node* BuildF64Sin(Node* input);
   Node* BuildF64Tan(Node* input);
   Node* BuildF64Exp(Node* input);
   Node* BuildF64Log(Node* input);
   Node* BuildF64Pow(Node* left, Node* right);
   Node* BuildF64Atan2(Node* left, Node* right);
   Node* BuildF64Mod(Node* left, Node* right);
 
+  Node* BuildConversionInstruction(
+      Node* input, ExternalReference ref,
+      MachineRepresentation parameter_representation,
+      const MachineType result_type);
+  Node* BuildF32SConvertI64(Node* input);
+  Node* BuildF32UConvertI64(Node* input);
+  Node* BuildF64SConvertI64(Node* input);
+  Node* BuildF64UConvertI64(Node* input);
+
   Node** Realloc(Node** buffer, size_t count) {
     Node** buf = Buffer(count);
     if (buf != buffer) memcpy(buf, buffer, count * sizeof(Node*));
     return buf;
   }
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_WASM_COMPILER_H_