[Valgrind-users] __addvsi3, valgrind and g++ (GCC) 4.1.0 20050719

[Mathieu M. <mma...@ny...>]

Hello,

	I am runninng nightly tests with valgrind enabled on a project called: 
CMake. Recently a bunch of error appears, when compiling CMake in 
Release mode (-O3) and using an experimental g++ (gcc-snapshot debian 
package). The errors look like:

...
==7829== Conditional jump or move depends on uninitialised value(s)
==7829==    at 0x1BA2F155: __addvsi3 (in /lib/libgcc_s.so.1)
==7829==    by 0x81EDD4F: 
cmCommandArgumentParserHelper::AllocateParserType(cmCommandArgumentParserHelper::ParserType*, 
char const*, int) (in 
/home/mathieu/Dashboards/MyTests/CMake-gcc-snapshot/bin/ctest)
==7829==    by 0x820E491: 
cmCommandArgument_yylex(cmCommandArgumentParserHelper::ParserType*, 
void*) (in /home/mathieu/Dashboards/MyTests/CMake-gcc-snapshot/bin/ctest)
...


	I cannot reproduce those using g++-4.0 (debian package) or using 
g++-snapshot in Debug mode (-g -O0).

	Any advice on why this is happening ?

Thanks,
Mathieu
Ps: Extract of the code:
cmCommandArgumentParserHelper::AllocateParserType:

void 
cmCommandArgumentParserHelper::AllocateParserType(cmCommandArgumentParserHelper::ParserType* 
pt,
   const char* str, int len)
{
   pt->str = 0;
   if ( len == 0 )
     {
     len = strlen(str);
     }
   if ( len == 0 )
     {
     return;
     }
   this->UnionsAvailable ++;
   pt->str = new char[ len + 1 ];
   strncpy(pt->str, str, len);
   pt->str[len] = 0;
   m_Variables.push_back(pt->str);
}