diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 690a53e785c..75faf526fab 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -11970,17 +11970,21 @@ SDValue DAGCombiner::visitSTORE(SDNode *N) { // resultant store does not need a higher alignment than the original. if (Value.getOpcode() == ISD::BITCAST && !ST->isTruncatingStore() && ST->isUnindexed()) { - unsigned OrigAlign = ST->getAlignment(); EVT SVT = Value.getOperand(0).getValueType(); - unsigned Align = DAG.getDataLayout().getABITypeAlignment( - SVT.getTypeForEVT(*DAG.getContext())); - if (Align <= OrigAlign && - ((!LegalOperations && !ST->isVolatile()) || - TLI.isOperationLegalOrCustom(ISD::STORE, SVT))) - return DAG.getStore(Chain, SDLoc(N), Value.getOperand(0), - Ptr, ST->getPointerInfo(), ST->isVolatile(), - ST->isNonTemporal(), OrigAlign, - ST->getAAInfo()); + if (((!LegalOperations && !ST->isVolatile()) || + TLI.isOperationLegalOrCustom(ISD::STORE, SVT)) && + TLI.isStoreBitCastBeneficial(Value.getValueType(), SVT)) { + unsigned OrigAlign = ST->getAlignment(); + bool Fast = false; + if (TLI.allowsMemoryAccess(*DAG.getContext(), DAG.getDataLayout(), SVT, + ST->getAddressSpace(), OrigAlign, &Fast) && + Fast) { + return DAG.getStore(Chain, SDLoc(N), Value.getOperand(0), + Ptr, ST->getPointerInfo(), ST->isVolatile(), + ST->isNonTemporal(), OrigAlign, + ST->getAAInfo()); + } + } } // Turn 'store undef, Ptr' -> nothing. |
