basic_string.tcc (_M_mutate): Don't compute __src unnecessarily.

2004-04-21  Paolo Carlini  <pcarlini@suse.de>
	    Andrew Pinski  <pinskia@physics.uc.edu>

	* include/bits/basic_string.tcc (_M_mutate): Don't compute
	__src unnecessarily.

Co-Authored-By: Andrew Pinski <pinskia@physics.uc.edu>

From-SVN: r80952

libstdc++-v3/ChangeLog

+2004-04-21  Paolo Carlini  <pcarlini@suse.de>
+	    Andrew Pinski  <pinskia@physics.uc.edu>
+
+	* include/bits/basic_string.tcc (_M_mutate): Don't compute
+	__src unnecessarily.
+
 2004-04-19  Benjamin Kosnik  <bkoz@redhat.com>
 
 	* testsuite/27_io/basic_istream/extractors_character/char/9555-ic.cc: 

libstdc++-v3/include/bits/basic_string.tcc

@@ -383,7 +383,6 @@ namespace std
     {
       const size_type __old_size = this->size();
       const size_type __new_size = __old_size + __len2 - __len1;
-      const _CharT*        __src = _M_data()  + __pos + __len1;
       const size_type __how_much = __old_size - __pos - __len1;
 
       if (_M_rep() == &_S_empty_rep()
@@ -397,7 +396,7 @@ namespace std
 	    traits_type::copy(__r->_M_refdata(), _M_data(), __pos);
 	  if (__how_much)
 	    traits_type::copy(__r->_M_refdata() + __pos + __len2,
-			      __src, __how_much);
+			      _M_data() + __pos + __len1, __how_much);
 
 	  _M_rep()->_M_dispose(__a);
 	  _M_data(__r->_M_refdata());
@@ -405,7 +404,8 @@ namespace std
       else if (__how_much && __len1 != __len2)
 	{
 	  // Work in-place
-	  traits_type::move(_M_data() + __pos + __len2, __src, __how_much);
+	  traits_type::move(_M_data() + __pos + __len2,
+			    _M_data() + __pos + __len1, __how_much);
 	}
       _M_rep()->_M_set_sharable();
       _M_rep()->_M_length = __new_size;