Here are the results from current llvm/llvm-gcc-4.2 svn and gcc 4.2.4 for the Polyhedron 2005 benchmarks under MacOS X 10.5.6 on a MacPro. Ave Run (secs) Ave Run (secs) llvm-gcc-4.2/ Benchmark llvm-gcc-4.2 svn gcc 4.2.4 gcc 4.2.4 ac 15.01 15.32 0.980 aermod 15.96 22.96 0.695 air 8.25 8.15 1.012 capaccita 51.41 52.16 0.986 channel 3.32 5.17 0.642 doduc 34.06 34.43 0.989 fatigue 12.80 12.57 1.018 gas_dyn 16.45 13.59 1.210 induct 26.70 28.61 0.933 linpk 15.40 15.46 0.996 mdbx 14.19 12.41 1.143 nf 29.01 27.08 1.071 protein 45.03 41.61 1.082 rnflow 39.67 35.37 1.122 test_fpu 14.03 11.94 1.172 tfft 2.19 2.13 1.028