llvm dev - Sep 2013 - [LLVMdev] [Polly] Performance comparison between Cloog and ISL code generation

Hello all,

The performance comparison between Polly's Cloog and ISL code generator is
posted
on http://188.40.87.11:8000/db_default/v4/nts/59?compare_to=58&baseline=58

It seems their execution-time performance are comparable:

Performance Regressions - Execution Time  (ISL over Cloog)
MultiSource/Benchmarks/TSVC/ControlFlow-flt/ControlFlow-flt	8.49%
MultiSource/Benchmarks/TSVC/StatementReordering-flt/StatementReordering-flt
6.77%
MultiSource/Benchmarks/TSVC/CrossingThresholds-flt/CrossingThresholds-flt	2.65%
SingleSource/UnitTests/Vectorizer/gcc-loops	2.63%

Performance Improvements - Execution Time  (ISL over Cloog)
MultiSource/Benchmarks/TSVC/NodeSplitting-flt/NodeSplitting-flt	-6.77%
MultiSource/Benchmarks/ASC_Sequoia/AMGmk/AMGmk	-3.03%

However, ISL outperforms Cloog in compile-time performance.  With ISL code
generator, 22 benchmarks have >10% compile-time performance improvement over
Cloog. Top 10 improvements are shown as follows:

Performance Improvements - Compile Time (ISL over Cloog)
MultiSource/Benchmarks/ASC_Sequoia/AMGmk/AMGmk	-69.11%
MultiSource/Benchmarks/Trimaran/netbench-crc/netbench-crc	-44.39%
SingleSource/Benchmarks/Polybench/linear-algebra/kernels/3mm/3mm	-12.74%
SingleSource/Benchmarks/Polybench/linear-algebra/kernels/gemm/gemm	-11.21%
MultiSource/Benchmarks/TSVC/LoopRerolling-flt/LoopRerolling-flt	-11.14%
SingleSource/Benchmarks/Polybench/linear-algebra/kernels/syr2k/syr2k	-11.11%
MultiSource/Benchmarks/TSVC/Packing-flt/Packing-flt	-10.87%
MultiSource/Benchmarks/TSVC/Searching-dbl/Searching-dbl	-10.87%
SingleSource/Benchmarks/Polybench/linear-algebra/kernels/2mm/2mm	-10.74%
SingleSource/Benchmarks/Polybench/linear-algebra/kernels/doitgen/doitgen	-10.66%
...

Star Tan
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