MIPS: [turbofan] Improve matching for And(Shr(x, imm), mask).

src/mips64/constants-mips64.h

 // Copyright 2012 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_MIPS_CONSTANTS_H_
 #define  V8_MIPS_CONSTANTS_H_
 
 #include "src/base/logging.h"
 #include "src/base/macros.h"
 #include "src/globals.h"
@@ skipping 1179 matching lines @@
           return kRegisterType;
         default:
           return kUnsupported;
       }
       break;
     case SPECIAL3:
       switch (FunctionFieldRaw()) {
         case INS:
         case EXT:
         case DEXT:
+        case DEXTM:
+        case DEXTU:
           return kRegisterType;
         case BSHFL: {
           int sa = SaFieldRaw() >> kSaShift;
           switch (sa) {
             case BITSWAP:
               return kRegisterType;
             case WSBH:
             case SEB:
             case SEH:
               return kUnsupported;
@@ skipping 55 matching lines @@
   }
   return kUnsupported;
 }
 
 #undef OpcodeToBitNumber
 #undef FunctionFieldToBitNumber
 }  // namespace internal
 }  // namespace v8
 
 #endif    // #ifndef V8_MIPS_CONSTANTS_H_