[Interpreter] Avoid accessing on-heap literal in VisitLiteral.

src/conversions-inl.h

 // Copyright 2011 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.
 
 #ifndef V8_CONVERSIONS_INL_H_
 #define V8_CONVERSIONS_INL_H_
 
 #include <float.h>         // Required for DBL_MAX and on Win32 for finite()
 #include <limits.h>        // Required for INT_MAX etc.
 #include <stdarg.h>
@@ skipping 79 matching lines @@
   int exponent = d.Exponent();
   if (exponent < 0) {
     if (exponent <= -Double::kSignificandSize) return 0;
     return d.Sign() * static_cast<int32_t>(d.Significand() >> -exponent);
   } else {
     if (exponent > 31) return 0;
     return d.Sign() * static_cast<int32_t>(d.Significand() << exponent);
   }
 }
 
+bool DoubleToSmiInteger(double value, int* smi_int_value) {
+  if (IsMinusZero(value)) return false;
+  int i = FastD2IChecked(value);
+  if (value != i || !Smi::IsValid(i)) return false;
+  *smi_int_value = i;
+  return true;
+}
 
 bool IsSmiDouble(double value) {
   return !IsMinusZero(value) && value >= Smi::kMinValue &&
          value <= Smi::kMaxValue && value == FastI2D(FastD2I(value));
 }
 
 
 bool IsInt32Double(double value) {
   return !IsMinusZero(value) && value >= kMinInt && value <= kMaxInt &&
          value == FastI2D(FastD2I(value));
@@ skipping 649 matching lines @@
   buffer[buffer_pos] = '\0';
 
   double converted = Strtod(Vector<const char>(buffer, buffer_pos), exponent);
   return (sign == NEGATIVE) ? -converted : converted;
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CONVERSIONS_INL_H_