Fix an overflow in on-stack replacement spill-slot allocation for Crankshaft.

src/lithium.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 126 matching lines @@
       : public BitField<Lifetime, kLifetimeShift, kLifetimeWidth> {
   };
 
   class VirtualRegisterField
       : public BitField<unsigned,
                         kVirtualRegisterShift,
                         kVirtualRegisterWidth> {
   };
 
   static const int kMaxVirtualRegisters = 1 << (kVirtualRegisterWidth + 1);
-  static const int kMaxFixedIndices = 128;
+  static const int kMaxFixedIndex = 63;
+  static const int kMinFixedIndex = -64;
 
   bool HasIgnorePolicy() const { return policy() == IGNORE; }
   bool HasNoPolicy() const { return policy() == NONE; }
   bool HasAnyPolicy() const {
     return policy() == ANY;
   }
   bool HasFixedPolicy() const {
     return policy() == FIXED_REGISTER ||
         policy() == FIXED_DOUBLE_REGISTER ||
         policy() == FIXED_SLOT;
@@ skipping 426 matching lines @@
   ShallowIterator current_iterator_;
 };
 
 
 int ElementsKindToShiftSize(JSObject::ElementsKind elements_kind);
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LITHIUM_H_