diff options
Diffstat (limited to 'llvm/lib/Target/PowerPC/PPCISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCISelLowering.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp index 75b5180a943..aa3ffde24b9 100644 --- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp @@ -6606,11 +6606,17 @@ void PPCTargetLowering::spliceIntoChain(SDValue ResChain, /// \brief Analyze profitability of direct move /// prefer float load to int load plus direct move /// when there is no integer use of int load -static bool directMoveIsProfitable(const SDValue &Op) { +bool PPCTargetLowering::directMoveIsProfitable(const SDValue &Op) const { SDNode *Origin = Op.getOperand(0).getNode(); if (Origin->getOpcode() != ISD::LOAD) return true; + // If there is no LXSIBZX/LXSIHZX, like Power8, + // prefer direct move if the memory size is 1 or 2 bytes. + MachineMemOperand *MMO = cast<LoadSDNode>(Origin)->getMemOperand(); + if (!Subtarget.hasP9Vector() && MMO->getSize() <= 2) + return true; + for (SDNode::use_iterator UI = Origin->use_begin(), UE = Origin->use_end(); UI != UE; ++UI) { |
