[wasm] Initial commit for the Int64Reducer.

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 79 matching lines @@
 #if !WASM_64
   switch (opcode) {
     // Opcodes not supported on 32-bit platforms.
     case kExprI64Add:
     case kExprI64Sub:
     case kExprI64Mul:
     case kExprI64DivS:
     case kExprI64DivU:
     case kExprI64RemS:
     case kExprI64RemU:
-    case kExprI64And:
+    // case kExprI64And:

[titzer, 2016/02/02 10:14:35]

Just remove them

[ahaas, 2016/02/02 13:32:48]

Apparently some tests fail if I remove the instructions here already. We have to
wait until locals are supported (and maybe other stuff like function calls).

     case kExprI64Ior:
     case kExprI64Xor:
     case kExprI64Shl:
     case kExprI64ShrU:
     case kExprI64ShrS:
     case kExprI64Eq:
     case kExprI64Ne:
     case kExprI64LtS:
     case kExprI64LeS:
     case kExprI64LtU:
     case kExprI64LeU:
     case kExprI64GtS:
     case kExprI64GeS:
     case kExprI64GtU:
     case kExprI64GeU:
 
-    case kExprI32ConvertI64:
+    // case kExprI32ConvertI64:
     case kExprI64SConvertI32:
     case kExprI64UConvertI32:
 
     case kExprF64ReinterpretI64:
     case kExprI64ReinterpretF64:
 
     case kExprI64Clz:
     case kExprI64Ctz:
     case kExprI64Popcnt:
 
@@ skipping 10 matching lines @@
     default:
       return true;
   }
 #else
   return true;
 #endif
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8