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[DAG] Update comments. NFC. 

llvm-svn: 310404
This commit is contained in:
Nirav Dave 2017-08-08 19:52:19 +00:00
parent b40c177095
commit 515116d7c2
1 changed files with 9 additions and 8 deletions
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17
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -463,23 +463,24 @@ namespace {
SDValue getMergeStoreChains(SmallVectorImpl<MemOpLink> &StoreNodes,
unsigned NumStores);
/// This is a helper function for MergeConsecutiveStores. When the source
/// elements of the consecutive stores are all constants or all extracted
/// vector elements, try to merge them into one larger store.
/// \return True if a merged store was created.
/// This is a helper function for MergeConsecutiveStores. When the
/// source elements of the consecutive stores are all constants or
/// all extracted vector elements, try to merge them into one
/// larger store. \return True if a merged store was created.
bool MergeStoresOfConstantsOrVecElts(SmallVectorImpl<MemOpLink> &StoreNodes,
EVT MemVT, unsigned NumStores,
bool IsConstantSrc, bool UseVector,
bool UseTrunc);
/// This is a helper function for MergeConsecutiveStores.
/// Stores that may be merged are placed in StoreNodes.
/// This is a helper function for MergeConsecutiveStores. Stores
/// that potentially may be merged with St are placed in
/// StoreNodes.
void getStoreMergeCandidates(StoreSDNode *St,
SmallVectorImpl<MemOpLink> &StoreNodes);
/// Helper function for MergeConsecutiveStores. Checks if
/// Candidate stores have indirect dependency through their
/// operands. \return True if safe to merge
/// candidate stores have indirect dependency through their
/// operands. \return True if safe to merge.
bool checkMergeStoreCandidatesForDependencies(
SmallVectorImpl<MemOpLink> &StoreNodes, unsigned NumStores);