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[Statepoints] Skip a vector copy when uniquing values. 

No functionality change intended.

llvm-svn: 239688
This commit is contained in:
Benjamin Kramer 2015-06-13 19:50:38 +00:00
parent bd7b1c89fc
commit 258ea0dbdf
1 changed files with 4 additions and 11 deletions
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15
llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
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@ -1659,17 +1659,10 @@ static void relocationViaAlloca(
/// vector. Doing so has the effect of changing the output of a couple of /// vector. Doing so has the effect of changing the output of a couple of
/// tests in ways which make them less useful in testing fused safepoints. /// tests in ways which make them less useful in testing fused safepoints.
template <typename T> static void unique_unsorted(SmallVectorImpl<T> &Vec) { template <typename T> static void unique_unsorted(SmallVectorImpl<T> &Vec) {
DenseSet<T> Seen; SmallSet<T, 8> Seen;
SmallVector<T, 128> TempVec; Vec.erase(std::remove_if(Vec.begin(), Vec.end(), [&](const T &V) {
TempVec.reserve(Vec.size()); return !Seen.insert(V).second;
for (auto Element : Vec) }), Vec.end());
TempVec.push_back(Element);
Vec.clear();
for (auto V : TempVec) {
if (Seen.insert(V).second) {
Vec.push_back(V);
}
}
} }
/// Insert holders so that each Value is obviously live through the entire /// Insert holders so that each Value is obviously live through the entire