MIPS64: Fix [turbofan] Length and index2 are unsigned in CheckedLoad/CheckedStore.

src/compiler/mips64/instruction-selector-mips64.cc

 // Copyright 2014 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/base/adapters.h"
 #include "src/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 140 matching lines @@
       opcode = kMips64Ldc1;
       break;
     case MachineRepresentation::kBit:  // Fall through.
     case MachineRepresentation::kWord8:
       opcode = load_rep.IsUnsigned() ? kMips64Lbu : kMips64Lb;
       break;
     case MachineRepresentation::kWord16:
       opcode = load_rep.IsUnsigned() ? kMips64Lhu : kMips64Lh;
       break;
     case MachineRepresentation::kWord32:
-      opcode = kMips64Lw;
+      opcode = load_rep.IsUnsigned() ? kMips64Lwu : kMips64Lw;
       break;
     case MachineRepresentation::kTagged:  // Fall through.
     case MachineRepresentation::kWord64:
       opcode = kMips64Ld;
       break;
     case MachineRepresentation::kSimd128:  // Fall through.
     case MachineRepresentation::kNone:
       UNREACHABLE();
       return;
   }
@@ skipping 1877 matching lines @@
          MachineOperatorBuilder::kFloat32RoundUp |
          MachineOperatorBuilder::kFloat64RoundTruncate |
          MachineOperatorBuilder::kFloat32RoundTruncate |
          MachineOperatorBuilder::kFloat64RoundTiesEven |
          MachineOperatorBuilder::kFloat32RoundTiesEven;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8