Hi!

This tiny patch moves ASan and TSan passes just before sanopt pass, that 
gives nice speedup on several SPEC2006 tests (-O2 optimization level was 
used) on x86:

TESTCASE       ORIGINAL PATCHED SPEEDUP
401.bzip2        806    798     0.99%
403.gcc          506    475     6.13%
429.mcf          337    295     12.46%
456.hmmer        1005   1017    -1.19%
458.sjeng        993    946     4.73%
462.libquantum   312    290     7.05%
473.astar        550    539     2.00%
483.xalancbmk    439    363     17.31%
410.bwaves       1720   1712    0.47%
416.gamess       3101   3105    -0.13%
433.milc         469    358     23.67%
434.zeusmp       1497   1499    -0.13%
435.gromacs      926    905     2.27%
436.cactusADM    2572   2612    -1.56%
437.leslie3d     1472   1470    0.14%
444.namd         474    452     4.64%
447.dealII       505    429     15.05%
459.GemsFDTD     1812   1812    0.00%
465.tonto        1289   1292    -0.23%
470.lbm          302    228     24.50%
482.sphinx3      1030   617     40.10%

Does this change looks reasonable for trunk?

-Maxim