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| author | Nadav Rotem <nrotem@apple.com> | 2013-07-27 23:28:47 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2013-07-27 23:28:47 +0000 |
| commit | 3e50c68956c96c95182a78c4e29bbf3b638baf4a (patch) | |
| tree | 617e1d47f67abf14122befcdd3a60bebd20c3d1c /llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp | |
| parent | 57217350257d1f455528693d7529fae32f1dad99 (diff) | |
| download | bcm5719-llvm-3e50c68956c96c95182a78c4e29bbf3b638baf4a.tar.gz bcm5719-llvm-3e50c68956c96c95182a78c4e29bbf3b638baf4a.zip | |
Update the comment
llvm-svn: 187316
Diffstat (limited to 'llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp index 50e37e99169..db1a91ec9e3 100644 --- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp +++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp @@ -900,6 +900,7 @@ int BoUpSLP::getTreeCost() { // Don't vectorize tiny trees. Small load/store chains or consecutive stores // of constants will be vectoried in SelectionDAG in MergeConsecutiveStores. + // The SelectionDAG vectorizer can only handle pairs (trees of height = 2). if (VectorizableTree.size() < 3) { if (!VectorizableTree.size()) { assert(!ExternalUses.size() && "We should not have any external users"); |
