[RFC][PATCH, ASan] ASan and TSan passes place change.

[Maxim Ostapenko]

On 07/08/15 11:42, Maxim Ostapenko wrote:
> 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

I've rechecked testing results and found out, that such huge speedup in 
appropriate tests was caused by missing instrumentation of 
TARGET_MEM_REFs. After fixing this, all speedup gone, so moving ASan 
pass down to pipeline doesn't make any sense. Sorry for noise.

-Maxim