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| author | Charlie Turner <charlie.turner@arm.com> | 2015-11-11 15:03:46 +0000 |
|---|---|---|
| committer | Charlie Turner <charlie.turner@arm.com> | 2015-11-11 15:03:46 +0000 |
| commit | d82c9389e731562cd844c91a2f52db98c470108b (patch) | |
| tree | e4ed8c7062e345ff70ec8086ffbe6a97c0252e5e | |
| parent | 470b5f1a7906e3250ee0605aa202051f1dddac5d (diff) | |
| download | llvm-d82c9389e731562cd844c91a2f52db98c470108b.zip llvm-d82c9389e731562cd844c91a2f52db98c470108b.tar.gz llvm-d82c9389e731562cd844c91a2f52db98c470108b.tar.bz2 | |
[SLP] Enable -slp-vectorize-hor by default.
Measurements primarily on AArch64 have shown this feature does not
significantly effect compile-time. The are no significant perf changes in LNT,
but for AArch64 at least, there are wins in third party benchmarks.
As discussed on llvm-dev, we're going to try turning this on by default and see
how other targets react to the change.
llvm-svn: 252733
| -rw-r--r-- | llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp index ab81430..ad28a72 100644 --- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp +++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp @@ -61,7 +61,7 @@ static cl::opt<int> "number ")); static cl::opt<bool> -ShouldVectorizeHor("slp-vectorize-hor", cl::init(false), cl::Hidden, +ShouldVectorizeHor("slp-vectorize-hor", cl::init(true), cl::Hidden, cl::desc("Attempt to vectorize horizontal reductions")); static cl::opt<bool> ShouldStartVectorizeHorAtStore( |