StringToDouble code size optimization.

src/conversions.cc

Index: src/conversions.cc
diff --git a/src/conversions.cc b/src/conversions.cc
index fd0f9ee4d81cce588c5f2625463205d0a117d206..5f1219eea9139cf2aa77c0c8dda95609b6a12481 100644
--- a/src/conversions.cc
+++ b/src/conversions.cc
@@ -46,8 +46,11 @@ namespace internal {
 
 double StringToDouble(UnicodeCache* unicode_cache,
                       const char* str, int flags, double empty_string_val) {
-  const char* end = str + StrLength(str);
-  return InternalStringToDouble(unicode_cache, str, end, flags,
+  // We cast to const uint8_t* here to avoid instantiating the
+  // InternalStringToDouble() template for const char* as well.
+  const uint8_t* start = reinterpret_cast<const uint8_t*>(str);
+  const uint8_t* end = start + StrLength(str);
+  return InternalStringToDouble(unicode_cache, start, end, flags,
                                 empty_string_val);
 }
 
@@ -56,11 +59,15 @@ double StringToDouble(UnicodeCache* unicode_cache,
                       Vector<const char> str,
                       int flags,
                       double empty_string_val) {
-  const char* end = str.start() + str.length();
-  return InternalStringToDouble(unicode_cache, str.start(), end, flags,
+  // We cast to const uint8_t* here to avoid instantiating the
+  // InternalStringToDouble() template for const char* as well.
+  const uint8_t* start = reinterpret_cast<const uint8_t*>(str.start());
+  const uint8_t* end = start + str.length();
+  return InternalStringToDouble(unicode_cache, start, end, flags,
                                 empty_string_val);
 }
 
+
 double StringToDouble(UnicodeCache* unicode_cache,
                       Vector<const uc16> str,
                       int flags,