[PATCH] D15792: [AArch64] Turn off PredictableSelectIsExpensive on the Cortex-A57

[Junmo Park via llvm-commits]

flyingforyou added a comment.

3rd try.

I ran some benchmarks against http://reviews.llvm.org/differential/diff/43669/. (Base Revision: r256477)
Env: GalaxyS6 Dev Board, Cortex-A57 2.1Ghz, MIF 1.5Ghz
Test: Execute each benchmark 4 times & get average. with -mcpu=cortex-a57, O3

in Spec2000, 2006 : Lower is better.

| Program                                              | Opt/Ori |
| External/SPEC/CFP2000/177.mesa/177.mesa              | 98.81%  |
| External/SPEC/CFP2000/179.art/179.art                | 104.56% |
| External/SPEC/CFP2000/183.equake/183.equake          | 99.89%  |
| External/SPEC/CFP2000/188.ammp/188.ammp              | 99.75%  |
| External/SPEC/CFP2006/433.milc/433.milc              | 100.49% |
| External/SPEC/CFP2006/444.namd/444.namd              | 100.11% |
| External/SPEC/CFP2006/447.dealII/447.dealII          | 99.71%  |
| External/SPEC/CFP2006/450.soplex/450.soplex          | 100.00% |
| External/SPEC/CFP2006/470.lbm/470.lbm                | 99.60%  |
| External/SPEC/CINT2000/164.gzip/164.gzip             | 100.02% |
| External/SPEC/CINT2000/175.vpr/175.vpr               | 100.79% |
| External/SPEC/CINT2000/176.gcc/176.gcc               | 100.14% |
| External/SPEC/CINT2000/181.mcf/181.mcf               | 100.59% |
| External/SPEC/CINT2000/186.crafty/186.crafty         | 99.97%  |
| External/SPEC/CINT2000/197.parser/197.parser         | 100.00% |
| External/SPEC/CINT2000/254.gap/254.gap               | 100.21% |
| External/SPEC/CINT2000/255.vortex/255.vortex         | 99.67%  |
| External/SPEC/CINT2000/256.bzip2/256.bzip2           | 96.01%  |
| External/SPEC/CINT2000/300.twolf/300.twolf           | 99.91%  |
| External/SPEC/CINT2006/400.perlbench/400.perlbench   | 98.75%  |
| External/SPEC/CINT2006/401.bzip2/401.bzip2           | 99.56%  |
| External/SPEC/CINT2006/403.gcc/403.gcc               | 100.18% |
| External/SPEC/CINT2006/429.mcf/429.mcf               | 100.31% |
| External/SPEC/CINT2006/445.gobmk/445.gobmk           | 100.00% |
| External/SPEC/CINT2006/456.hmmer/456.hmmer           | 101.52% |
| External/SPEC/CINT2006/458.sjeng/458.sjeng           | 101.29% |
| External/SPEC/CINT2006/462.libquantum/462.libquantum | 100.00% |
| External/SPEC/CINT2006/464.h264ref/464.h264ref       | 99.85%  |
| External/SPEC/CINT2006/471.omnetpp/471.omnetpp       | 98.85%  |
| External/SPEC/CINT2006/473.astar/473.astar           | 99.88%  |
| External/SPEC/CINT2006/483.xalancbmk/483.xalancbmk   | 95.52%  |
| Geometric Mean                                       | 99.86%  |

in test-suite (223 benchmarks) :

| Geometric Mean | 99.90% |

This result also shows the patch may be acceptable.

Junmo.


http://reviews.llvm.org/D15792