diff options
Diffstat (limited to 'lib/Target/ARM')
| -rw-r--r-- | lib/Target/ARM/ARMLoadStoreOptimizer.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp index 4c3be89b3ec..c8728f4ade4 100644 --- a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp +++ b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp @@ -32,6 +32,7 @@ #include "llvm/Target/TargetMachine.h" #include "llvm/Target/TargetRegisterInfo.h" #include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/Debug.h" #include "llvm/ADT/DenseMap.h" #include "llvm/ADT/STLExtras.h" #include "llvm/ADT/SmallPtrSet.h" @@ -1504,6 +1505,23 @@ static bool IsSafeAndProfitableToMove(bool isLd, unsigned Base, return AddedRegPressure.size() <= MemRegs.size() * 2; } + +/// Copy Op0 and Op1 operands into a new array assigned to MI. +static void concatenateMemOperands(MachineInstr *MI, MachineInstr *Op0, + MachineInstr *Op1) { + assert(MI->memoperands_empty() && "expected a new machineinstr"); + size_t numMemRefs = (Op0->memoperands_end() - Op0->memoperands_begin()) + + (Op1->memoperands_end() - Op1->memoperands_begin()); + + MachineFunction *MF = MI->getParent()->getParent(); + MachineSDNode::mmo_iterator MemBegin = MF->allocateMemRefsArray(numMemRefs); + MachineSDNode::mmo_iterator MemEnd = + std::copy(Op0->memoperands_begin(), Op0->memoperands_end(), MemBegin); + MemEnd = + std::copy(Op1->memoperands_begin(), Op1->memoperands_end(), MemEnd); + MI->setMemRefs(MemBegin, MemEnd); +} + bool ARMPreAllocLoadStoreOpt::CanFormLdStDWord(MachineInstr *Op0, MachineInstr *Op1, DebugLoc &dl, @@ -1698,6 +1716,8 @@ bool ARMPreAllocLoadStoreOpt::RescheduleOps(MachineBasicBlock *MBB, if (!isT2) MIB.addReg(0); MIB.addImm(Offset).addImm(Pred).addReg(PredReg); + concatenateMemOperands(MIB, Op0, Op1); + DEBUG(dbgs() << "Formed " << *MIB << "\n"); ++NumLDRDFormed; } else { MachineInstrBuilder MIB = BuildMI(*MBB, InsertPos, dl, MCID) @@ -1710,6 +1730,8 @@ bool ARMPreAllocLoadStoreOpt::RescheduleOps(MachineBasicBlock *MBB, if (!isT2) MIB.addReg(0); MIB.addImm(Offset).addImm(Pred).addReg(PredReg); + concatenateMemOperands(MIB, Op0, Op1); + DEBUG(dbgs() << "Formed " << *MIB << "\n"); ++NumSTRDFormed; } MBB->erase(Op0); |