[turbofan] support for Int64 in CheckedLoad/CheckedStore on 64-bit platforms.

src/compiler/ppc/code-generator-ppc.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/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/osr.h"
@@ skipping 1124 matching lines @@
       break;
     case kCheckedLoadInt16:
       ASSEMBLE_CHECKED_LOAD_INTEGER(lha, lhax);
       break;
     case kCheckedLoadUint16:
       ASSEMBLE_CHECKED_LOAD_INTEGER(lhz, lhzx);
       break;
     case kCheckedLoadWord32:
       ASSEMBLE_CHECKED_LOAD_INTEGER(lwa, lwax);
       break;
+    case kCheckedLoadWord64:
+#if V8_TARGET_ARCH_PPC64
+      ASSEMBLE_CHECKED_LOAD_INTEGER(ld, ldx);
+#else
+      UNREACHABLE();
+#endif
+      break;
     case kCheckedLoadFloat32:
       ASSEMBLE_CHECKED_LOAD_FLOAT(lfs, lfsx, 32);
       break;
     case kCheckedLoadFloat64:
       ASSEMBLE_CHECKED_LOAD_FLOAT(lfd, lfdx, 64);
       break;
     case kCheckedStoreWord8:
       ASSEMBLE_CHECKED_STORE_INTEGER(stb, stbx);
       break;
     case kCheckedStoreWord16:
       ASSEMBLE_CHECKED_STORE_INTEGER(sth, sthx);
       break;
     case kCheckedStoreWord32:
       ASSEMBLE_CHECKED_STORE_INTEGER(stw, stwx);
       break;
+    case kCheckedStoreWord64:
+#if V8_TARGET_ARCH_PPC64
+      ASSEMBLE_CHECKED_STORE_INTEGER(std, stdx);
+#else
+      UNREACHABLE();
+#endif
+      break;
     case kCheckedStoreFloat32:
       ASSEMBLE_CHECKED_STORE_FLOAT32();
       break;
     case kCheckedStoreFloat64:
       ASSEMBLE_CHECKED_STORE_DOUBLE();
       break;
     default:
       UNREACHABLE();
       break;
   }
@@ skipping 442 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8