diff options
Diffstat (limited to 'lib/Target/Mips/MipsISelLowering.cpp')
| -rw-r--r-- | lib/Target/Mips/MipsISelLowering.cpp | 169 |
1 files changed, 54 insertions, 115 deletions
diff --git a/lib/Target/Mips/MipsISelLowering.cpp b/lib/Target/Mips/MipsISelLowering.cpp index 7741f9f..c5207c6 100644 --- a/lib/Target/Mips/MipsISelLowering.cpp +++ b/lib/Target/Mips/MipsISelLowering.cpp @@ -157,7 +157,6 @@ MipsTargetLowering(MipsTargetMachine &TM) setOperationAction(ISD::SETCC, MVT::f32, Custom); setOperationAction(ISD::SETCC, MVT::f64, Custom); setOperationAction(ISD::BRCOND, MVT::Other, Custom); - setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom); setOperationAction(ISD::VASTART, MVT::Other, Custom); setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom); setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom); @@ -178,7 +177,6 @@ MipsTargetLowering(MipsTargetMachine &TM) setOperationAction(ISD::JumpTable, MVT::i64, Custom); setOperationAction(ISD::ConstantPool, MVT::i64, Custom); setOperationAction(ISD::SELECT, MVT::i64, Custom); - setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Custom); setOperationAction(ISD::LOAD, MVT::i64, Custom); setOperationAction(ISD::STORE, MVT::i64, Custom); } @@ -217,6 +215,8 @@ MipsTargetLowering(MipsTargetMachine &TM) setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand); setOperationAction(ISD::ROTL, MVT::i32, Expand); setOperationAction(ISD::ROTL, MVT::i64, Expand); + setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand); + setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand); if (!Subtarget->hasMips32r2()) setOperationAction(ISD::ROTR, MVT::i32, Expand); @@ -314,8 +314,6 @@ bool MipsTargetLowering::allowsUnalignedMemoryAccesses(EVT VT) const { case MVT::i64: case MVT::i32: return true; - case MVT::f32: - return Subtarget->hasMips32r2Or64(); default: return false; } @@ -794,7 +792,6 @@ LowerOperation(SDValue Op, SelectionDAG &DAG) const { case ISD::BRCOND: return LowerBRCOND(Op, DAG); case ISD::ConstantPool: return LowerConstantPool(Op, DAG); - case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG); case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG); case ISD::BlockAddress: return LowerBlockAddress(Op, DAG); case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG); @@ -1504,42 +1501,6 @@ MipsTargetLowering::EmitAtomicCmpSwapPartword(MachineInstr *MI, // Misc Lower Operation implementation //===----------------------------------------------------------------------===// SDValue MipsTargetLowering:: -LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const -{ - MachineFunction &MF = DAG.getMachineFunction(); - MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>(); - unsigned SP = IsN64 ? Mips::SP_64 : Mips::SP; - - assert(getTargetMachine().getFrameLowering()->getStackAlignment() >= - cast<ConstantSDNode>(Op.getOperand(2).getNode())->getZExtValue() && - "Cannot lower if the alignment of the allocated space is larger than \ - that of the stack."); - - SDValue Chain = Op.getOperand(0); - SDValue Size = Op.getOperand(1); - DebugLoc dl = Op.getDebugLoc(); - - // Get a reference from Mips stack pointer - SDValue StackPointer = DAG.getCopyFromReg(Chain, dl, SP, getPointerTy()); - - // Subtract the dynamic size from the actual stack size to - // obtain the new stack size. - SDValue Sub = DAG.getNode(ISD::SUB, dl, getPointerTy(), StackPointer, Size); - - // The Sub result contains the new stack start address, so it - // must be placed in the stack pointer register. - Chain = DAG.getCopyToReg(StackPointer.getValue(1), dl, SP, Sub, SDValue()); - - // This node always has two return values: a new stack pointer - // value and a chain - SDVTList VTLs = DAG.getVTList(getPointerTy(), MVT::Other); - SDValue Ptr = DAG.getFrameIndex(MipsFI->getDynAllocFI(), getPointerTy()); - SDValue Ops[] = { Chain, Ptr, Chain.getValue(1) }; - - return DAG.getNode(MipsISD::DynAlloc, dl, VTLs, Ops, 3); -} - -SDValue MipsTargetLowering:: LowerBRCOND(SDValue Op, SelectionDAG &DAG) const { // The first operand is the chain, the second is the condition, the third is @@ -2455,9 +2416,9 @@ static unsigned getNextIntArgReg(unsigned Reg) { // Write ByVal Arg to arg registers and stack. static void -WriteByValArg(SDValue& ByValChain, SDValue Chain, DebugLoc dl, +WriteByValArg(SDValue Chain, DebugLoc dl, SmallVector<std::pair<unsigned, SDValue>, 16> &RegsToPass, - SmallVector<SDValue, 8> &MemOpChains, int &LastFI, + SmallVector<SDValue, 8> &MemOpChains, SDValue StackPtr, MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg, const CCValAssign &VA, const ISD::ArgFlagsTy &Flags, MVT PtrType, bool isLittle) { @@ -2531,24 +2492,24 @@ WriteByValArg(SDValue& ByValChain, SDValue Chain, DebugLoc dl, return; } - // Create a fixed object on stack at offset LocMemOffset and copy - // remaining part of byval arg to it using memcpy. + // Copy remaining part of byval arg using memcpy. SDValue Src = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg, DAG.getConstant(Offset, MVT::i32)); - LastFI = MFI->CreateFixedObject(RemainingSize, LocMemOffset, true); - SDValue Dst = DAG.getFrameIndex(LastFI, PtrType); - ByValChain = DAG.getMemcpy(ByValChain, dl, Dst, Src, - DAG.getConstant(RemainingSize, MVT::i32), - std::min(ByValAlign, (unsigned)4), - /*isVolatile=*/false, /*AlwaysInline=*/false, - MachinePointerInfo(0), MachinePointerInfo(0)); + SDValue Dst = DAG.getNode(ISD::ADD, dl, MVT::i32, StackPtr, + DAG.getIntPtrConstant(LocMemOffset)); + Chain = DAG.getMemcpy(Chain, dl, Dst, Src, + DAG.getConstant(RemainingSize, MVT::i32), + std::min(ByValAlign, (unsigned)4), + /*isVolatile=*/false, /*AlwaysInline=*/false, + MachinePointerInfo(0), MachinePointerInfo(0)); + MemOpChains.push_back(Chain); } // Copy Mips64 byVal arg to registers and stack. void static -PassByValArg64(SDValue& ByValChain, SDValue Chain, DebugLoc dl, +PassByValArg64(SDValue Chain, DebugLoc dl, SmallVector<std::pair<unsigned, SDValue>, 16> &RegsToPass, - SmallVector<SDValue, 8> &MemOpChains, int &LastFI, + SmallVector<SDValue, 8> &MemOpChains, SDValue StackPtr, MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg, const CCValAssign &VA, const ISD::ArgFlagsTy &Flags, EVT PtrTy, bool isLittle) { @@ -2620,16 +2581,16 @@ PassByValArg64(SDValue& ByValChain, SDValue Chain, DebugLoc dl, assert(MemCpySize && "MemCpySize must not be zero."); - // Create a fixed object on stack at offset LocMemOffset and copy - // remainder of byval arg to it with memcpy. + // Copy remainder of byval arg to it with memcpy. SDValue Src = DAG.getNode(ISD::ADD, dl, PtrTy, Arg, DAG.getConstant(Offset, PtrTy)); - LastFI = MFI->CreateFixedObject(MemCpySize, LocMemOffset, true); - SDValue Dst = DAG.getFrameIndex(LastFI, PtrTy); - ByValChain = DAG.getMemcpy(ByValChain, dl, Dst, Src, - DAG.getConstant(MemCpySize, PtrTy), Alignment, - /*isVolatile=*/false, /*AlwaysInline=*/false, - MachinePointerInfo(0), MachinePointerInfo(0)); + SDValue Dst = DAG.getNode(ISD::ADD, dl, MVT::i64, StackPtr, + DAG.getIntPtrConstant(LocMemOffset)); + Chain = DAG.getMemcpy(Chain, dl, Dst, Src, + DAG.getConstant(MemCpySize, PtrTy), Alignment, + /*isVolatile=*/false, /*AlwaysInline=*/false, + MachinePointerInfo(0), MachinePointerInfo(0)); + MemOpChains.push_back(Chain); } /// LowerCall - functions arguments are copied from virtual regs to @@ -2643,9 +2604,8 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, SmallVector<ISD::OutputArg, 32> &Outs = CLI.Outs; SmallVector<SDValue, 32> &OutVals = CLI.OutVals; SmallVector<ISD::InputArg, 32> &Ins = CLI.Ins; - SDValue InChain = CLI.Chain; + SDValue Chain = CLI.Chain; SDValue Callee = CLI.Callee; - SDValue CalleeSave = CLI.Callee; bool &isTailCall = CLI.IsTailCall; CallingConv::ID CallConv = CLI.CallConv; bool isVarArg = CLI.IsVarArg; @@ -2675,18 +2635,8 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, // Get a count of how many bytes are to be pushed on the stack. unsigned NextStackOffset = CCInfo.getNextStackOffset(); - - // Chain is the output chain of the last Load/Store or CopyToReg node. - // ByValChain is the output chain of the last Memcpy node created for copying - // byval arguments to the stack. - SDValue Chain, CallSeqStart, ByValChain; - SDValue NextStackOffsetVal = DAG.getIntPtrConstant(NextStackOffset, true); - Chain = CallSeqStart = DAG.getCALLSEQ_START(InChain, NextStackOffsetVal); - ByValChain = InChain; - - // Get the frame index of the stack frame object that points to the location - // of dynamically allocated area on the stack. - int DynAllocFI = MipsFI->getDynAllocFI(); + unsigned StackAlignment = TFL->getStackAlignment(); + NextStackOffset = RoundUpToAlignment(NextStackOffset, StackAlignment); // Update size of the maximum argument space. // For O32, a minimum of four words (16 bytes) of argument space is @@ -2694,27 +2644,23 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, if (IsO32 && (CallConv != CallingConv::Fast)) NextStackOffset = std::max(NextStackOffset, (unsigned)16); - unsigned MaxCallFrameSize = MipsFI->getMaxCallFrameSize(); - - if (MaxCallFrameSize < NextStackOffset) { - MipsFI->setMaxCallFrameSize(NextStackOffset); + // Chain is the output chain of the last Load/Store or CopyToReg node. + // ByValChain is the output chain of the last Memcpy node created for copying + // byval arguments to the stack. + SDValue NextStackOffsetVal = DAG.getIntPtrConstant(NextStackOffset, true); + Chain = DAG.getCALLSEQ_START(Chain, NextStackOffsetVal); - // Set the offsets relative to $sp of the $gp restore slot and dynamically - // allocated stack space. These offsets must be aligned to a boundary - // determined by the stack alignment of the ABI. - unsigned StackAlignment = TFL->getStackAlignment(); - NextStackOffset = (NextStackOffset + StackAlignment - 1) / - StackAlignment * StackAlignment; + SDValue StackPtr = DAG.getCopyFromReg(Chain, dl, + IsN64 ? Mips::SP_64 : Mips::SP, + getPointerTy()); - MFI->setObjectOffset(DynAllocFI, NextStackOffset); - } + if (MipsFI->getMaxCallFrameSize() < NextStackOffset) + MipsFI->setMaxCallFrameSize(NextStackOffset); // With EABI is it possible to have 16 args on registers. SmallVector<std::pair<unsigned, SDValue>, 16> RegsToPass; SmallVector<SDValue, 8> MemOpChains; - int FirstFI = -MFI->getNumFixedObjects() - 1, LastFI = 0; - // Walk the register/memloc assignments, inserting copies/loads. for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) { SDValue Arg = OutVals[i]; @@ -2727,11 +2673,11 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, assert(Flags.getByValSize() && "ByVal args of size 0 should have been ignored by front-end."); if (IsO32) - WriteByValArg(ByValChain, Chain, dl, RegsToPass, MemOpChains, LastFI, + WriteByValArg(Chain, dl, RegsToPass, MemOpChains, StackPtr, MFI, DAG, Arg, VA, Flags, getPointerTy(), Subtarget->isLittle()); else - PassByValArg64(ByValChain, Chain, dl, RegsToPass, MemOpChains, LastFI, + PassByValArg64(Chain, dl, RegsToPass, MemOpChains, StackPtr, MFI, DAG, Arg, VA, Flags, getPointerTy(), Subtarget->isLittle()); continue; @@ -2781,29 +2727,14 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, // Register can't get to this point... assert(VA.isMemLoc()); - // Create the frame index object for this incoming parameter - LastFI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8, - VA.getLocMemOffset(), true); - SDValue PtrOff = DAG.getFrameIndex(LastFI, getPointerTy()); - // emit ISD::STORE whichs stores the // parameter value to a stack Location + SDValue PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, + DAG.getIntPtrConstant(VA.getLocMemOffset())); MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo(), false, false, 0)); } - // Extend range of indices of frame objects for outgoing arguments that were - // created during this function call. Skip this step if no such objects were - // created. - if (LastFI) - MipsFI->extendOutArgFIRange(FirstFI, LastFI); - - // If a memcpy has been created to copy a byval arg to a stack, replace the - // chain input of CallSeqStart with ByValChain. - if (InChain != ByValChain) - DAG.UpdateNodeOperands(CallSeqStart.getNode(), ByValChain, - NextStackOffsetVal); - // Transform all store nodes into one single node because all store // nodes are independent of each other. if (!MemOpChains.empty()) @@ -2867,6 +2798,9 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, } } + // T9 register operand. + SDValue T9; + // T9 should contain the address of the callee function if // -reloction-model=pic or it is an indirect call. if (IsPICCall || !GlobalOrExternal) { @@ -2874,7 +2808,11 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, unsigned T9Reg = IsN64 ? Mips::T9_64 : Mips::T9; Chain = DAG.getCopyToReg(Chain, dl, T9Reg, Callee, SDValue(0, 0)); InFlag = Chain.getValue(1); - Callee = DAG.getRegister(T9Reg, getPointerTy()); + + if (Subtarget->inMips16Mode()) + T9 = DAG.getRegister(T9Reg, getPointerTy()); + else + Callee = DAG.getRegister(T9Reg, getPointerTy()); } // Insert node "GP copy globalreg" before call to function. @@ -2902,7 +2840,7 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue); SmallVector<SDValue, 8> Ops; Ops.push_back(Chain); - Ops.push_back(Subtarget->inMips16Mode()? CalleeSave: Callee); + Ops.push_back(Callee); // Add argument registers to the end of the list so that they are // known live into the call. @@ -2910,8 +2848,10 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, Ops.push_back(DAG.getRegister(RegsToPass[i].first, RegsToPass[i].second.getValueType())); - if (Subtarget->inMips16Mode()) - Ops.push_back(Callee); + // Add T9 register operand. + if (T9.getNode()) + Ops.push_back(T9); + // Add a register mask operand representing the call-preserved registers. const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo(); const uint32_t *Mask = TRI->getCallPreservedMask(CallConv); @@ -2925,8 +2865,7 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, InFlag = Chain.getValue(1); // Create the CALLSEQ_END node. - Chain = DAG.getCALLSEQ_END(Chain, - DAG.getIntPtrConstant(NextStackOffset, true), + Chain = DAG.getCALLSEQ_END(Chain, NextStackOffsetVal, DAG.getIntPtrConstant(0, true), InFlag); InFlag = Chain.getValue(1); |