PPC64: [turbofan] Word32 loads should be unsigned.

src/compiler/ppc/instruction-scheduler-ppc.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/compiler/instruction-scheduler.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 95 matching lines @@
     case kPPC_BitcastFloat32ToInt32:
     case kPPC_BitcastInt64ToDouble:
     case kPPC_BitcastDoubleToInt64:
       return kNoOpcodeFlags;
 
     case kPPC_LoadWordS8:
     case kPPC_LoadWordU8:
     case kPPC_LoadWordS16:
     case kPPC_LoadWordU16:
     case kPPC_LoadWordS32:
+    case kPPC_LoadWordU32:
     case kPPC_LoadWord64:
     case kPPC_LoadFloat32:
     case kPPC_LoadDouble:
       return kIsLoadOperation;
 
     case kPPC_StoreWord8:
     case kPPC_StoreWord16:
     case kPPC_StoreWord32:
     case kPPC_StoreWord64:
     case kPPC_StoreFloat32:
@@ skipping 16 matching lines @@
 
 
 int InstructionScheduler::GetInstructionLatency(const Instruction* instr) {
   // TODO(all): Add instruction cost modeling.
   return 1;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8