[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 172 matching lines @@
   Node* BuildRoundingInstruction(Node* input, ExternalReference ref,
                                  MachineType type);
   Node* BuildF32Trunc(Node* input);
   Node* BuildF32Floor(Node* input);
   Node* BuildF32Ceil(Node* input);
   Node* BuildF32NearestInt(Node* input);
   Node* BuildF64Trunc(Node* input);
   Node* BuildF64Floor(Node* input);
   Node* BuildF64Ceil(Node* input);
   Node* BuildF64NearestInt(Node* input);
+  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_