diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index b5e1b492e96..3a9c17045c1 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -12874,9 +12874,6 @@ bool DAGCombiner::MergeConsecutiveStores(StoreSDNode *St) { if (Ld->isVolatile() || Ld->isIndexed()) break; - // We do not accept ext loads. - if (Ld->getExtensionType() != ISD::NON_EXTLOAD) - break; // The stored memory type must be the same. if (Ld->getMemoryVT() != MemVT) @@ -13014,17 +13011,31 @@ bool DAGCombiner::MergeConsecutiveStores(StoreSDNode *St) { // The merged loads are required to have the same incoming chain, so // using the first's chain is acceptable. - SDValue NewLoad = DAG.getLoad(JointMemOpVT, LoadDL, FirstLoad->getChain(), - FirstLoad->getBasePtr(), - FirstLoad->getPointerInfo(), FirstLoadAlign); SDValue NewStoreChain = getMergeStoreChains(StoreNodes, NumElem); - AddToWorklist(NewStoreChain.getNode()); - SDValue NewStore = DAG.getStore( - NewStoreChain, StoreDL, NewLoad, FirstInChain->getBasePtr(), - FirstInChain->getPointerInfo(), FirstStoreAlign); + SDValue NewLoad, NewStore; + if (TLI.isTypeLegal(JointMemOpVT)) { + NewLoad = DAG.getLoad(JointMemOpVT, LoadDL, FirstLoad->getChain(), + FirstLoad->getBasePtr(), + FirstLoad->getPointerInfo(), FirstLoadAlign); + NewStore = DAG.getStore(NewStoreChain, StoreDL, NewLoad, + FirstInChain->getBasePtr(), + FirstInChain->getPointerInfo(), FirstStoreAlign); + } else { // This must be the truncstore/extload case + EVT ExtendedTy = + TLI.getTypeToTransformTo(*DAG.getContext(), JointMemOpVT); + NewLoad = DAG.getExtLoad(ISD::EXTLOAD, LoadDL, ExtendedTy, + FirstLoad->getChain(), FirstLoad->getBasePtr(), + FirstLoad->getPointerInfo(), JointMemOpVT, + FirstLoadAlign); + NewStore = DAG.getTruncStore(NewStoreChain, StoreDL, NewLoad, + FirstInChain->getBasePtr(), + FirstInChain->getPointerInfo(), JointMemOpVT, + FirstInChain->getAlignment(), + FirstInChain->getMemOperand()->getFlags()); + } // Transfer chain users from old loads to the new load. for (unsigned i = 0; i < NumElem; ++i) { |
