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| author | Wan Xiaofei <xiaofei.wan@intel.com> | 2013-10-26 03:08:02 +0000 |
|---|---|---|
| committer | Wan Xiaofei <xiaofei.wan@intel.com> | 2013-10-26 03:08:02 +0000 |
| commit | 887f9c5ec15582aec34aa6c28955d01e4e9961e2 (patch) | |
| tree | bd8ce8148a4f3a444b2ea0ffa51579a94fa9bb07 /lib/Transforms/Vectorize/LoopVectorize.cpp | |
| parent | f7ca7c2a09d4fa03d29fbb1fd1358a285b3c6e2e (diff) | |
| download | llvm-887f9c5ec15582aec34aa6c28955d01e4e9961e2.tar.gz llvm-887f9c5ec15582aec34aa6c28955d01e4e9961e2.tar.bz2 llvm-887f9c5ec15582aec34aa6c28955d01e4e9961e2.tar.xz | |
Quick look-up for block in loop.
This patch implements quick look-up for block in loop by maintaining a hash set for blocks.
It improves the efficiency of loop analysis a lot, the biggest improvement could be 5-6%(458.sjeng).
Below are the compilation time for our benchmark in llc before & after the patch.
Benchmark llc - trunk llc - patched
401.bzip2 0.339081 100.00% 0.329657 102.86%
403.gcc 19.853966 100.00% 19.605466 101.27%
429.mcf 0.049823 100.00% 0.048451 102.83%
433.milc 0.514898 100.00% 0.510217 100.92%
444.namd 1.109328 100.00% 1.103481 100.53%
445.gobmk 4.988028 100.00% 4.929114 101.20%
456.hmmer 0.843871 100.00% 0.825865 102.18%
458.sjeng 0.754238 100.00% 0.714095 105.62%
464.h264ref 2.9668 100.00% 2.90612 102.09%
471.omnetpp 4.556533 100.00% 4.511886 100.99%
bitmnp01 0.038168 100.00% 0.0357 106.91%
idctrn01 0.037745 100.00% 0.037332 101.11%
libquake2 3.78689 100.00% 3.76209 100.66%
libquake_ 2.251525 100.00% 2.234104 100.78%
linpack 0.033159 100.00% 0.032788 101.13%
matrix01 0.045319 100.00% 0.043497 104.19%
nbench 0.333161 100.00% 0.329799 101.02%
tblook01 0.017863 100.00% 0.017666 101.12%
ttsprk01 0.054337 100.00% 0.053057 102.41%
Reviewer : Andrew Trick <atrick@apple.com>, Hal Finkel <hfinkel@anl.gov>
Approver : Andrew Trick <atrick@apple.com>
Test : Pass make check-all & llvm test-suite
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193460 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Vectorize/LoopVectorize.cpp')
| -rw-r--r-- | lib/Transforms/Vectorize/LoopVectorize.cpp | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/lib/Transforms/Vectorize/LoopVectorize.cpp b/lib/Transforms/Vectorize/LoopVectorize.cpp index 8b5424f599..507f67f9c2 100644 --- a/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -2694,14 +2694,14 @@ bool LoopVectorizationLegality::canVectorizeWithIfConvert() { return false; assert(TheLoop->getNumBlocks() > 1 && "Single block loops are vectorizable"); - std::vector<BasicBlock*> &LoopBlocks = TheLoop->getBlocksVector(); // A list of pointers that we can safely read and write to. SmallPtrSet<Value *, 8> SafePointes; // Collect safe addresses. - for (unsigned i = 0, e = LoopBlocks.size(); i < e; ++i) { - BasicBlock *BB = LoopBlocks[i]; + for (Loop::block_iterator BI = TheLoop->block_begin(), + BE = TheLoop->block_end(); BI != BE; ++BI) { + BasicBlock *BB = *BI; if (blockNeedsPredication(BB)) continue; @@ -2715,8 +2715,9 @@ bool LoopVectorizationLegality::canVectorizeWithIfConvert() { } // Collect the blocks that need predication. - for (unsigned i = 0, e = LoopBlocks.size(); i < e; ++i) { - BasicBlock *BB = LoopBlocks[i]; + for (Loop::block_iterator BI = TheLoop->block_begin(), + BE = TheLoop->block_end(); BI != BE; ++BI) { + BasicBlock *BB = *BI; // We don't support switch statements inside loops. if (!isa<BranchInst>(BB->getTerminator())) |