I think you're referring to another benchmark. AFAICS, this one doesn't test clang or tcc.
[1] http://phoronix.com/forums/showthread.php?29090-CompilerDeat...
side-by-side comparisons do however indicate that Clang performed as good or better than ICC or GCC when -O2 is used!
And through the link by yread you can see that clang really performs very well overall.[1]: http://phoronix.com/forums/showthread.php?29090-CompilerDeat...