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

src/compiler/x64/code-generator-x64.cc

 // Copyright 2013 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 1253 matching lines @@
       break;
     case kCheckedLoadInt16:
       ASSEMBLE_CHECKED_LOAD_INTEGER(movsxwl);
       break;
     case kCheckedLoadUint16:
       ASSEMBLE_CHECKED_LOAD_INTEGER(movzxwl);
       break;
     case kCheckedLoadWord32:
       ASSEMBLE_CHECKED_LOAD_INTEGER(movl);
       break;
+    case kCheckedLoadWord64:
+      ASSEMBLE_CHECKED_LOAD_INTEGER(movq);
+      break;
     case kCheckedLoadFloat32:
       ASSEMBLE_CHECKED_LOAD_FLOAT(movss);
       break;
     case kCheckedLoadFloat64:
       ASSEMBLE_CHECKED_LOAD_FLOAT(movsd);
       break;
     case kCheckedStoreWord8:
       ASSEMBLE_CHECKED_STORE_INTEGER(movb);
       break;
     case kCheckedStoreWord16:
       ASSEMBLE_CHECKED_STORE_INTEGER(movw);
       break;
     case kCheckedStoreWord32:
       ASSEMBLE_CHECKED_STORE_INTEGER(movl);
       break;
+    case kCheckedStoreWord64:
+      ASSEMBLE_CHECKED_STORE_INTEGER(movq);
+      break;
     case kCheckedStoreFloat32:
       ASSEMBLE_CHECKED_STORE_FLOAT(movss);
       break;
     case kCheckedStoreFloat64:
       ASSEMBLE_CHECKED_STORE_FLOAT(movsd);
       break;
     case kX64StackCheck:
       __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
       break;
   }
@@ skipping 473 matching lines @@
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     __ Nop(padding_size);
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace compiler
 }  // namespace v8