#define DEBUG_TYPE "mips-isel"
#include "Mips.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
#include "MipsAnalyzeImmediate.h"
#include "MipsMachineFunction.h"
#include "MipsRegisterInfo.h"
#include "MipsSubtarget.h"
#include "MipsTargetMachine.h"
-#include "MCTargetDesc/MipsBaseInfo.h"
-#include "llvm/GlobalValue.h"
-#include "llvm/Instructions.h"
-#include "llvm/Intrinsics.h"
-#include "llvm/Support/CFG.h"
-#include "llvm/Type.h"
#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/CodeGen/SelectionDAGNodes.h"
-#include "llvm/Target/TargetMachine.h"
+#include "llvm/IR/GlobalValue.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Intrinsics.h"
+#include "llvm/IR/Type.h"
+#include "llvm/Support/CFG.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetMachine.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
SDNode *getGlobalBaseReg();
+ SDValue getMips16SPAliasReg();
+
+ void getMips16SPRefReg(SDNode *parent, SDValue &AliasReg);
+
std::pair<SDNode*, SDNode*> SelectMULT(SDNode *N, unsigned Opc, DebugLoc dl,
EVT Ty, bool HasLo, bool HasHi);
// Complex Pattern.
bool SelectAddr(SDNode *Parent, SDValue N, SDValue &Base, SDValue &Offset);
+ bool SelectAddr16(SDNode *Parent, SDValue N, SDValue &Base, SDValue &Offset,
+ SDValue &Alias);
+
// getImm - Return a target constant with the specified value.
inline SDValue getImm(const SDNode *Node, unsigned Imm) {
return CurDAG->getTargetConstant(Imm, Node->getValueType(0));
void ProcessFunctionAfterISel(MachineFunction &MF);
bool ReplaceUsesWithZeroReg(MachineRegisterInfo *MRI, const MachineInstr&);
void InitGlobalBaseReg(MachineFunction &MF);
+ void InitMips16SPAliasReg(MachineFunction &MF);
virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
char ConstraintCode,
void MipsDAGToDAGISel::InitGlobalBaseReg(MachineFunction &MF) {
MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
- if (((MF.getTarget().getRelocationModel() == Reloc::Static) ||
- Subtarget.inMips16Mode()) && !MipsFI->globalBaseRegSet())
+ if (!MipsFI->globalBaseRegSet())
return;
MachineBasicBlock &MBB = MF.front();
MachineBasicBlock::iterator I = MBB.begin();
MachineRegisterInfo &RegInfo = MF.getRegInfo();
- const MipsRegisterInfo *TargetRegInfo = TM.getRegisterInfo();
- const MipsInstrInfo *MII = TM.getInstrInfo();
const TargetInstrInfo &TII = *MF.getTarget().getInstrInfo();
DebugLoc DL = I != MBB.end() ? I->getDebugLoc() : DebugLoc();
unsigned V0, V1, V2, GlobalBaseReg = MipsFI->getGlobalBaseReg();
- int FI = 0;
-
- FI= MipsFI->initGlobalRegFI();
+ const TargetRegisterClass *RC;
- const TargetRegisterClass *RC = Subtarget.isABI_N64() ?
- (const TargetRegisterClass*)&Mips::CPU64RegsRegClass :
- (const TargetRegisterClass*)&Mips::CPURegsRegClass;
-
- if (Subtarget.inMips16Mode())
- RC=(const TargetRegisterClass*)&Mips::CPU16RegsRegClass;
+ if (Subtarget.isABI_N64())
+ RC = (const TargetRegisterClass*)&Mips::CPU64RegsRegClass;
+ else if (Subtarget.inMips16Mode())
+ RC = (const TargetRegisterClass*)&Mips::CPU16RegsRegClass;
+ else
+ RC = (const TargetRegisterClass*)&Mips::CPURegsRegClass;
V0 = RegInfo.createVirtualRegister(RC);
V1 = RegInfo.createVirtualRegister(RC);
.addReg(Mips::T9_64);
BuildMI(MBB, I, DL, TII.get(Mips::DADDiu), GlobalBaseReg).addReg(V1)
.addGlobalAddress(FName, 0, MipsII::MO_GPOFF_LO);
- MII->storeRegToStackSlot(MBB, I, GlobalBaseReg, false, FI, RC,
- TargetRegInfo);
return;
}
if (Subtarget.inMips16Mode()) {
BuildMI(MBB, I, DL, TII.get(Mips::LiRxImmX16), V0)
- .addExternalSymbol("_gp_disp", MipsII::MO_ABS_HI);
- BuildMI(MBB, I, DL, TII.get(Mips::AddiuRxPcImmX16),
- V1)
- .addExternalSymbol("_gp_disp", MipsII::MO_ABS_LO);
- BuildMI(MBB, I, DL, TII.get(Mips::SllX16),
- V2 ).addReg(V0).addImm(16);
+ .addExternalSymbol("_gp_disp", MipsII::MO_ABS_HI);
+ BuildMI(MBB, I, DL, TII.get(Mips::AddiuRxPcImmX16), V1)
+ .addExternalSymbol("_gp_disp", MipsII::MO_ABS_LO);
+ BuildMI(MBB, I, DL, TII.get(Mips::SllX16), V2).addReg(V0).addImm(16);
BuildMI(MBB, I, DL, TII.get(Mips::AdduRxRyRz16), GlobalBaseReg)
.addReg(V1).addReg(V2);
-
-
return;
}
BuildMI(MBB, I, DL, TII.get(Mips::ADDu), V1).addReg(V0).addReg(Mips::T9);
BuildMI(MBB, I, DL, TII.get(Mips::ADDiu), GlobalBaseReg).addReg(V1)
.addGlobalAddress(FName, 0, MipsII::MO_GPOFF_LO);
- MII->storeRegToStackSlot(MBB, I, GlobalBaseReg, false, FI, RC,
- TargetRegInfo);
return;
}
assert(Subtarget.isABI_O32());
-
- //if (Subtarget.inMips16Mode())
- // return; // no need to load GP. It can be calculated anywhere
-
-
-
// For O32 ABI, the following instruction sequence is emitted to initialize
// the global base register:
//
MBB.addLiveIn(Mips::V0);
BuildMI(MBB, I, DL, TII.get(Mips::ADDu), GlobalBaseReg)
.addReg(Mips::V0).addReg(Mips::T9);
- MII->storeRegToStackSlot(MBB, I, GlobalBaseReg, false, FI, RC, TargetRegInfo);
}
+// Insert instructions to initialize the Mips16 SP Alias register in the
+// first MBB of the function.
+//
+void MipsDAGToDAGISel::InitMips16SPAliasReg(MachineFunction &MF) {
+ MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
+
+ if (!MipsFI->mips16SPAliasRegSet())
+ return;
+
+ MachineBasicBlock &MBB = MF.front();
+ MachineBasicBlock::iterator I = MBB.begin();
+ const TargetInstrInfo &TII = *MF.getTarget().getInstrInfo();
+ DebugLoc DL = I != MBB.end() ? I->getDebugLoc() : DebugLoc();
+ unsigned Mips16SPAliasReg = MipsFI->getMips16SPAliasReg();
+
+ BuildMI(MBB, I, DL, TII.get(Mips::MoveR3216), Mips16SPAliasReg)
+ .addReg(Mips::SP);
+}
+
+
bool MipsDAGToDAGISel::ReplaceUsesWithZeroReg(MachineRegisterInfo *MRI,
const MachineInstr& MI) {
unsigned DstReg = 0, ZeroReg = 0;
// Replace uses with ZeroReg.
for (MachineRegisterInfo::use_iterator U = MRI->use_begin(DstReg),
- E = MRI->use_end(); U != E; ++U) {
+ E = MRI->use_end(); U != E;) {
MachineOperand &MO = U.getOperand();
+ unsigned OpNo = U.getOperandNo();
MachineInstr *MI = MO.getParent();
+ ++U;
// Do not replace if it is a phi's operand or is tied to def operand.
- if (MI->isPHI() || MI->isRegTiedToDefOperand(U.getOperandNo()) ||
- MI->isPseudo())
+ if (MI->isPHI() || MI->isRegTiedToDefOperand(OpNo) || MI->isPseudo())
continue;
MO.setReg(ZeroReg);
void MipsDAGToDAGISel::ProcessFunctionAfterISel(MachineFunction &MF) {
InitGlobalBaseReg(MF);
+ InitMips16SPAliasReg(MF);
MachineRegisterInfo *MRI = &MF.getRegInfo();
return CurDAG->getRegister(GlobalBaseReg, TLI.getPointerTy()).getNode();
}
+/// getMips16SPAliasReg - Output the instructions required to put the
+/// SP into a Mips16 accessible aliased register.
+SDValue MipsDAGToDAGISel::getMips16SPAliasReg() {
+ unsigned Mips16SPAliasReg =
+ MF->getInfo<MipsFunctionInfo>()->getMips16SPAliasReg();
+ return CurDAG->getRegister(Mips16SPAliasReg, TLI.getPointerTy());
+}
+
/// ComplexPattern used on MipsInstrInfo
/// Used on Mips Load/Store instructions
bool MipsDAGToDAGISel::
SelectAddr(SDNode *Parent, SDValue Addr, SDValue &Base, SDValue &Offset) {
EVT ValTy = Addr.getValueType();
- // If Parent is an unaligned f32 load or store, select a (base + index)
- // floating point load/store instruction (luxc1 or suxc1).
- const LSBaseSDNode *LS = 0;
-
- if (Parent && (LS = dyn_cast<LSBaseSDNode>(Parent))) {
- EVT VT = LS->getMemoryVT();
-
- if (VT.getSizeInBits() / 8 > LS->getAlignment()) {
- assert(TLI.allowsUnalignedMemoryAccesses(VT) &&
- "Unaligned loads/stores not supported for this type.");
- if (VT == MVT::f32)
- return false;
- }
- }
-
// if Address is FI, get the TargetFrameIndex.
if (FrameIndexSDNode *FIN = dyn_cast<FrameIndexSDNode>(Addr)) {
Base = CurDAG->getTargetFrameIndex(FIN->getIndex(), ValTy);
// Generate:
// lui $2, %hi($CPI1_0)
// lwc1 $f0, %lo($CPI1_0)($2)
- if (Addr.getOperand(1).getOpcode() == MipsISD::Lo) {
- SDValue LoVal = Addr.getOperand(1), Opnd0 = LoVal.getOperand(0);
+ if (Addr.getOperand(1).getOpcode() == MipsISD::Lo ||
+ Addr.getOperand(1).getOpcode() == MipsISD::GPRel) {
+ SDValue Opnd0 = Addr.getOperand(1).getOperand(0);
if (isa<ConstantPoolSDNode>(Opnd0) || isa<GlobalAddressSDNode>(Opnd0) ||
isa<JumpTableSDNode>(Opnd0)) {
Base = Addr.getOperand(0);
}
// If an indexed floating point load/store can be emitted, return false.
+ const LSBaseSDNode *LS = dyn_cast<LSBaseSDNode>(Parent);
+
if (LS &&
(LS->getMemoryVT() == MVT::f32 || LS->getMemoryVT() == MVT::f64) &&
- Subtarget.hasMips32r2Or64())
+ Subtarget.hasFPIdx())
return false;
}
return true;
}
+void MipsDAGToDAGISel::getMips16SPRefReg(SDNode *Parent, SDValue &AliasReg) {
+ SDValue AliasFPReg = CurDAG->getRegister(Mips::S0, TLI.getPointerTy());
+ if (Parent) {
+ switch (Parent->getOpcode()) {
+ case ISD::LOAD: {
+ LoadSDNode *SD = dyn_cast<LoadSDNode>(Parent);
+ switch (SD->getMemoryVT().getSizeInBits()) {
+ case 8:
+ case 16:
+ AliasReg = TM.getFrameLowering()->hasFP(*MF)?
+ AliasFPReg: getMips16SPAliasReg();
+ return;
+ }
+ break;
+ }
+ case ISD::STORE: {
+ StoreSDNode *SD = dyn_cast<StoreSDNode>(Parent);
+ switch (SD->getMemoryVT().getSizeInBits()) {
+ case 8:
+ case 16:
+ AliasReg = TM.getFrameLowering()->hasFP(*MF)?
+ AliasFPReg: getMips16SPAliasReg();
+ return;
+ }
+ break;
+ }
+ }
+ }
+ AliasReg = CurDAG->getRegister(Mips::SP, TLI.getPointerTy());
+ return;
+
+}
+bool MipsDAGToDAGISel::SelectAddr16(
+ SDNode *Parent, SDValue Addr, SDValue &Base, SDValue &Offset,
+ SDValue &Alias) {
+ EVT ValTy = Addr.getValueType();
+
+ Alias = CurDAG->getTargetConstant(0, ValTy);
+
+ // if Address is FI, get the TargetFrameIndex.
+ if (FrameIndexSDNode *FIN = dyn_cast<FrameIndexSDNode>(Addr)) {
+ Base = CurDAG->getTargetFrameIndex(FIN->getIndex(), ValTy);
+ Offset = CurDAG->getTargetConstant(0, ValTy);
+ getMips16SPRefReg(Parent, Alias);
+ return true;
+ }
+ // on PIC code Load GA
+ if (Addr.getOpcode() == MipsISD::Wrapper) {
+ Base = Addr.getOperand(0);
+ Offset = Addr.getOperand(1);
+ return true;
+ }
+ if (TM.getRelocationModel() != Reloc::PIC_) {
+ if ((Addr.getOpcode() == ISD::TargetExternalSymbol ||
+ Addr.getOpcode() == ISD::TargetGlobalAddress))
+ return false;
+ }
+ // Addresses of the form FI+const or FI|const
+ if (CurDAG->isBaseWithConstantOffset(Addr)) {
+ ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Addr.getOperand(1));
+ if (isInt<16>(CN->getSExtValue())) {
+
+ // If the first operand is a FI, get the TargetFI Node
+ if (FrameIndexSDNode *FIN = dyn_cast<FrameIndexSDNode>
+ (Addr.getOperand(0))) {
+ Base = CurDAG->getTargetFrameIndex(FIN->getIndex(), ValTy);
+ getMips16SPRefReg(Parent, Alias);
+ }
+ else
+ Base = Addr.getOperand(0);
+
+ Offset = CurDAG->getTargetConstant(CN->getZExtValue(), ValTy);
+ return true;
+ }
+ }
+ // Operand is a result from an ADD.
+ if (Addr.getOpcode() == ISD::ADD) {
+ // When loading from constant pools, load the lower address part in
+ // the instruction itself. Example, instead of:
+ // lui $2, %hi($CPI1_0)
+ // addiu $2, $2, %lo($CPI1_0)
+ // lwc1 $f0, 0($2)
+ // Generate:
+ // lui $2, %hi($CPI1_0)
+ // lwc1 $f0, %lo($CPI1_0)($2)
+ if (Addr.getOperand(1).getOpcode() == MipsISD::Lo ||
+ Addr.getOperand(1).getOpcode() == MipsISD::GPRel) {
+ SDValue Opnd0 = Addr.getOperand(1).getOperand(0);
+ if (isa<ConstantPoolSDNode>(Opnd0) || isa<GlobalAddressSDNode>(Opnd0) ||
+ isa<JumpTableSDNode>(Opnd0)) {
+ Base = Addr.getOperand(0);
+ Offset = Opnd0;
+ return true;
+ }
+ }
+
+ // If an indexed floating point load/store can be emitted, return false.
+ const LSBaseSDNode *LS = dyn_cast<LSBaseSDNode>(Parent);
+
+ if (LS &&
+ (LS->getMemoryVT() == MVT::f32 || LS->getMemoryVT() == MVT::f64) &&
+ Subtarget.hasFPIdx())
+ return false;
+ }
+ Base = Addr;
+ Offset = CurDAG->getTargetConstant(0, ValTy);
+ return true;
+}
+
/// Select multiply instructions.
std::pair<SDNode*, SDNode*>
MipsDAGToDAGISel::SelectMULT(SDNode *N, unsigned Opc, DebugLoc dl, EVT Ty,
SDValue InFlag = SDValue(Mul, 0);
if (HasLo) {
- Lo = CurDAG->getMachineNode(Ty == MVT::i32 ? Mips::MFLO : Mips::MFLO64, dl,
- Ty, MVT::Glue, InFlag);
+ unsigned Opcode = Subtarget.inMips16Mode() ? Mips::Mflo16 :
+ (Ty == MVT::i32 ? Mips::MFLO : Mips::MFLO64);
+ Lo = CurDAG->getMachineNode(Opcode, dl, Ty, MVT::Glue, InFlag);
InFlag = SDValue(Lo, 1);
}
- if (HasHi)
- Hi = CurDAG->getMachineNode(Ty == MVT::i32 ? Mips::MFHI : Mips::MFHI64, dl,
- Ty, InFlag);
-
+ if (HasHi) {
+ unsigned Opcode = Subtarget.inMips16Mode() ? Mips::Mfhi16 :
+ (Ty == MVT::i32 ? Mips::MFHI : Mips::MFHI64);
+ Hi = CurDAG->getMachineNode(Opcode, dl, Ty, InFlag);
+ }
return std::make_pair(Lo, Hi);
}
case ISD::SUBE:
case ISD::ADDE: {
+ bool inMips16Mode = Subtarget.inMips16Mode();
SDValue InFlag = Node->getOperand(2), CmpLHS;
unsigned Opc = InFlag.getOpcode(); (void)Opc;
assert(((Opc == ISD::ADDC || Opc == ISD::ADDE) ||
unsigned MOp;
if (Opcode == ISD::ADDE) {
CmpLHS = InFlag.getValue(0);
- MOp = Mips::ADDu;
+ if (inMips16Mode)
+ MOp = Mips::AdduRxRyRz16;
+ else
+ MOp = Mips::ADDu;
} else {
CmpLHS = InFlag.getOperand(0);
- MOp = Mips::SUBu;
+ if (inMips16Mode)
+ MOp = Mips::SubuRxRyRz16;
+ else
+ MOp = Mips::SUBu;
}
SDValue Ops[] = { CmpLHS, InFlag.getOperand(1) };
SDValue RHS = Node->getOperand(1);
EVT VT = LHS.getValueType();
- SDNode *Carry = CurDAG->getMachineNode(Mips::SLTu, dl, VT, Ops, 2);
- SDNode *AddCarry = CurDAG->getMachineNode(Mips::ADDu, dl, VT,
+
+ unsigned Sltu_op = inMips16Mode? Mips::SltuRxRyRz16: Mips::SLTu;
+ SDNode *Carry = CurDAG->getMachineNode(Sltu_op, dl, VT, Ops, 2);
+ unsigned Addu_op = inMips16Mode? Mips::AdduRxRyRz16 : Mips::ADDu;
+ SDNode *AddCarry = CurDAG->getMachineNode(Addu_op, dl, VT,
SDValue(Carry,0), RHS);
return CurDAG->SelectNodeTo(Node, MOp, VT, MVT::Glue,
/// Mul with two results
case ISD::SMUL_LOHI:
case ISD::UMUL_LOHI: {
- if (NodeTy == MVT::i32)
- MultOpc = (Opcode == ISD::UMUL_LOHI ? Mips::MULTu : Mips::MULT);
+ if (NodeTy == MVT::i32) {
+ if (Subtarget.inMips16Mode())
+ MultOpc = (Opcode == ISD::UMUL_LOHI ? Mips::MultuRxRy16 :
+ Mips::MultRxRy16);
+ else
+ MultOpc = (Opcode == ISD::UMUL_LOHI ? Mips::MULTu : Mips::MULT);
+ }
else
MultOpc = (Opcode == ISD::UMUL_LOHI ? Mips::DMULTu : Mips::DMULT);
}
case ISD::MULHS:
case ISD::MULHU: {
- if (NodeTy == MVT::i32)
- MultOpc = (Opcode == ISD::MULHU ? Mips::MULTu : Mips::MULT);
+ if (NodeTy == MVT::i32) {
+ if (Subtarget.inMips16Mode())
+ MultOpc = (Opcode == ISD::MULHU ?
+ Mips::MultuRxRy16 : Mips::MultRxRy16);
+ else
+ MultOpc = (Opcode == ISD::MULHU ? Mips::MULTu : Mips::MULT);
+ }
else
MultOpc = (Opcode == ISD::MULHU ? Mips::DMULTu : Mips::DMULT);
return RegOpnd;
}
+#ifndef NDEBUG
+ case ISD::LOAD:
+ case ISD::STORE:
+ assert(cast<MemSDNode>(Node)->getMemoryVT().getSizeInBits() / 8 <=
+ cast<MemSDNode>(Node)->getAlignment() &&
+ "Unexpected unaligned loads/stores.");
+ break;
+#endif
+
case MipsISD::ThreadPointer: {
EVT PtrVT = TLI.getPointerTy();
unsigned RdhwrOpc, SrcReg, DestReg;
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