Fixing more wasm warnings.

src/wasm/wasm-opcodes.cc

 // 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.
 
 #include "src/wasm/wasm-opcodes.h"
 #include "src/signature.h"
 
 namespace v8 {
 namespace internal {
 namespace wasm {
@@ skipping 55 matching lines @@
 
 // TODO(titzer): pull WASM_64 up to a common header.
 #if !V8_TARGET_ARCH_32_BIT || V8_TARGET_ARCH_X64
 #define WASM_64 1
 #else
 #define WASM_64 0
 #endif
 
 
 bool WasmOpcodes::IsSupported(WasmOpcode opcode) {
+#if !WASM_64
   switch (opcode) {
-#if !WASM_64
     // Opcodes not supported on 32-bit platforms.
     case kExprI64Add:
     case kExprI64Sub:
     case kExprI64Mul:
     case kExprI64DivS:
     case kExprI64DivU:
     case kExprI64RemS:
     case kExprI64RemU:
     case kExprI64And:
     case kExprI64Ior:
@@ skipping 25 matching lines @@
 
     case kExprF32SConvertI64:
     case kExprF32UConvertI64:
     case kExprF64SConvertI64:
     case kExprF64UConvertI64:
     case kExprI64SConvertF32:
     case kExprI64SConvertF64:
     case kExprI64UConvertF32:
     case kExprI64UConvertF64:
 
-#endif
       return false;
     default:
       return true;
   }
+#else
+  return true;
+#endif
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8