regex_compiler.h (_S_cache_size): Multiply the RHS of the shift-expression by _UseCache::value.

	* include/bits/regex_compiler.h (_S_cache_size): Multiply the
	RHS of the shift-expression by _UseCache::value.

From-SVN: r218322

libstdc++-v3/ChangeLog

+2014-12-03  Marek Polacek  <polacek@redhat.com>
+
+	* include/bits/regex_compiler.h (_S_cache_size): Multiply the
+	RHS of the shift-expression by _UseCache::value.
+
 2014-12-03  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/64168

libstdc++-v3/include/bits/regex_compiler.h

@@ -417,7 +417,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       typedef typename std::is_same<_CharT, char>::type _UseCache;
 
       static constexpr size_t
-      _S_cache_size() { return 1ul << (sizeof(_CharT) * __CHAR_BIT__); }
+      _S_cache_size()
+      {
+	return 1ul << (sizeof(_CharT) * __CHAR_BIT__ * int(_UseCache::value));
+      }
 
       struct _Dummy { };
       typedef typename std::conditional<_UseCache::value,