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| author | Hal Finkel <hfinkel@anl.gov> | 2013-01-29 00:22:49 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-01-29 00:22:49 +0000 |
| commit | c0b3d4c9c252acec01de719d4e756456d5377e6d (patch) | |
| tree | 7c4e56aff17812b2694f6e14b7189139572d337a | |
| parent | d3427d3f4094767884f3eafdef3d60c7f5038197 (diff) | |
Unroll again after running BBVectorize
Because BBVectorize may significantly shorten a loop body, unroll
again after vectorization. This is especially important when using
runtime or partial unrolling.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173730 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Transforms/IPO/PassManagerBuilder.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/IPO/PassManagerBuilder.cpp b/lib/Transforms/IPO/PassManagerBuilder.cpp index 6dc1773778..47b2b51899 100644 --- a/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -214,6 +214,10 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) { MPM.add(createGVNPass()); // Remove redundancies else MPM.add(createEarlyCSEPass()); // Catch trivial redundancies + + // BBVectorize may have significantly shortened a loop body; unroll again. + if (!DisableUnrollLoops) + MPM.add(createLoopUnrollPass()); } MPM.add(createAggressiveDCEPass()); // Delete dead instructions |