#include "MipsAnalyzeImmediate.h"
#include "MipsMachineFunction.h"
#include "MipsSEInstrInfo.h"
+#include "MipsSubtarget.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
bool expandCopy(MachineBasicBlock &MBB, Iter I);
bool expandCopyACC(MachineBasicBlock &MBB, Iter I, unsigned MFHiOpc,
unsigned MFLoOpc);
+ bool expandBuildPairF64(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I, bool FP64) const;
+ bool expandExtractElementF64(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I, bool FP64) const;
MachineFunction &MF;
MachineRegisterInfo &MRI;
+ const MipsSubtarget &Subtarget;
+ const MipsSEInstrInfo &TII;
+ const MipsRegisterInfo &RegInfo;
};
-}
+} // namespace
ExpandPseudo::ExpandPseudo(MachineFunction &MF_)
- : MF(MF_), MRI(MF.getRegInfo()) {}
+ : MF(MF_), MRI(MF.getRegInfo()),
+ Subtarget(static_cast<const MipsSubtarget &>(MF.getSubtarget())),
+ TII(*static_cast<const MipsSEInstrInfo *>(Subtarget.getInstrInfo())),
+ RegInfo(*Subtarget.getRegisterInfo()) {}
bool ExpandPseudo::expand() {
bool Expanded = false;
case Mips::STORE_ACC128:
expandStoreACC(MBB, I, Mips::PseudoMFHI64, Mips::PseudoMFLO64, 8);
break;
+ case Mips::BuildPairF64:
+ if (expandBuildPairF64(MBB, I, false))
+ MBB.erase(I);
+ return false;
+ case Mips::BuildPairF64_64:
+ if (expandBuildPairF64(MBB, I, true))
+ MBB.erase(I);
+ return false;
+ case Mips::ExtractElementF64:
+ if (expandExtractElementF64(MBB, I, false))
+ MBB.erase(I);
+ return false;
+ case Mips::ExtractElementF64_64:
+ if (expandExtractElementF64(MBB, I, true))
+ MBB.erase(I);
+ return false;
case TargetOpcode::COPY:
if (!expandCopy(MBB, I))
return false;
assert(I->getOperand(0).isReg() && I->getOperand(1).isFI());
- const MipsSEInstrInfo &TII =
- *static_cast<const MipsSEInstrInfo*>(MF.getTarget().getInstrInfo());
- const MipsRegisterInfo &RegInfo =
- *static_cast<const MipsRegisterInfo*>(MF.getTarget().getRegisterInfo());
-
const TargetRegisterClass *RC = RegInfo.intRegClass(4);
unsigned VR = MRI.createVirtualRegister(RC);
unsigned Dst = I->getOperand(0).getReg(), FI = I->getOperand(1).getIndex();
assert(I->getOperand(0).isReg() && I->getOperand(1).isFI());
- const MipsSEInstrInfo &TII =
- *static_cast<const MipsSEInstrInfo*>(MF.getTarget().getInstrInfo());
- const MipsRegisterInfo &RegInfo =
- *static_cast<const MipsRegisterInfo*>(MF.getTarget().getRegisterInfo());
-
const TargetRegisterClass *RC = RegInfo.intRegClass(4);
unsigned VR = MRI.createVirtualRegister(RC);
unsigned Src = I->getOperand(0).getReg(), FI = I->getOperand(1).getIndex();
assert(I->getOperand(0).isReg() && I->getOperand(1).isFI());
- const MipsSEInstrInfo &TII =
- *static_cast<const MipsSEInstrInfo*>(MF.getTarget().getInstrInfo());
- const MipsRegisterInfo &RegInfo =
- *static_cast<const MipsRegisterInfo*>(MF.getTarget().getRegisterInfo());
-
const TargetRegisterClass *RC = RegInfo.intRegClass(RegSize);
unsigned VR0 = MRI.createVirtualRegister(RC);
unsigned VR1 = MRI.createVirtualRegister(RC);
assert(I->getOperand(0).isReg() && I->getOperand(1).isFI());
- const MipsSEInstrInfo &TII =
- *static_cast<const MipsSEInstrInfo*>(MF.getTarget().getInstrInfo());
- const MipsRegisterInfo &RegInfo =
- *static_cast<const MipsRegisterInfo*>(MF.getTarget().getRegisterInfo());
-
const TargetRegisterClass *RC = RegInfo.intRegClass(RegSize);
unsigned VR0 = MRI.createVirtualRegister(RC);
unsigned VR1 = MRI.createVirtualRegister(RC);
// mfhi $vr1, src
// copy dst_hi, $vr1
- const MipsSEInstrInfo &TII =
- *static_cast<const MipsSEInstrInfo*>(MF.getTarget().getInstrInfo());
- const MipsRegisterInfo &RegInfo =
- *static_cast<const MipsRegisterInfo*>(MF.getTarget().getRegisterInfo());
-
unsigned Dst = I->getOperand(0).getReg(), Src = I->getOperand(1).getReg();
unsigned VRegSize = RegInfo.getMinimalPhysRegClass(Dst)->getSize() / 2;
const TargetRegisterClass *RC = RegInfo.intRegClass(VRegSize);
return true;
}
-unsigned MipsSEFrameLowering::ehDataReg(unsigned I) const {
- static const unsigned EhDataReg[] = {
- Mips::A0, Mips::A1, Mips::A2, Mips::A3
- };
- static const unsigned EhDataReg64[] = {
- Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64
- };
+/// This method expands the same instruction that MipsSEInstrInfo::
+/// expandBuildPairF64 does, for the case when ABI is fpxx and mthc1 is not
+/// available and the case where the ABI is FP64A. It is implemented here
+/// because frame indexes are eliminated before MipsSEInstrInfo::
+/// expandBuildPairF64 is called.
+bool ExpandPseudo::expandBuildPairF64(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I,
+ bool FP64) const {
+ // For fpxx and when mthc1 is not available, use:
+ // spill + reload via ldc1
+ //
+ // The case where dmtc1 is available doesn't need to be handled here
+ // because it never creates a BuildPairF64 node.
+ //
+ // The FP64A ABI (fp64 with nooddspreg) must also use a spill/reload sequence
+ // for odd-numbered double precision values (because the lower 32-bits is
+ // transferred with mtc1 which is redirected to the upper half of the even
+ // register). Unfortunately, we have to make this decision before register
+ // allocation so for now we use a spill/reload sequence for all
+ // double-precision values in regardless of being an odd/even register.
+ if ((Subtarget.isABI_FPXX() && !Subtarget.hasMTHC1()) ||
+ (FP64 && !Subtarget.useOddSPReg())) {
+ unsigned DstReg = I->getOperand(0).getReg();
+ unsigned LoReg = I->getOperand(1).getReg();
+ unsigned HiReg = I->getOperand(2).getReg();
+
+ // It should be impossible to have FGR64 on MIPS-II or MIPS32r1 (which are
+ // the cases where mthc1 is not available). 64-bit architectures and
+ // MIPS32r2 or later can use FGR64 though.
+ assert(Subtarget.isGP64bit() || Subtarget.hasMTHC1() ||
+ !Subtarget.isFP64bit());
+
+ const TargetRegisterClass *RC = &Mips::GPR32RegClass;
+ const TargetRegisterClass *RC2 =
+ FP64 ? &Mips::FGR64RegClass : &Mips::AFGR64RegClass;
+
+ // We re-use the same spill slot each time so that the stack frame doesn't
+ // grow too much in functions with a large number of moves.
+ int FI = MF.getInfo<MipsFunctionInfo>()->getMoveF64ViaSpillFI(RC2);
+ if (!Subtarget.isLittle())
+ std::swap(LoReg, HiReg);
+ TII.storeRegToStack(MBB, I, LoReg, I->getOperand(1).isKill(), FI, RC,
+ &RegInfo, 0);
+ TII.storeRegToStack(MBB, I, HiReg, I->getOperand(2).isKill(), FI, RC,
+ &RegInfo, 4);
+ TII.loadRegFromStack(MBB, I, DstReg, FI, RC2, &RegInfo, 0);
+ return true;
+ }
+
+ return false;
+}
+
+/// This method expands the same instruction that MipsSEInstrInfo::
+/// expandExtractElementF64 does, for the case when ABI is fpxx and mfhc1 is not
+/// available and the case where the ABI is FP64A. It is implemented here
+/// because frame indexes are eliminated before MipsSEInstrInfo::
+/// expandExtractElementF64 is called.
+bool ExpandPseudo::expandExtractElementF64(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I,
+ bool FP64) const {
+ // For fpxx and when mfhc1 is not available, use:
+ // spill + reload via ldc1
+ //
+ // The case where dmfc1 is available doesn't need to be handled here
+ // because it never creates a ExtractElementF64 node.
+ //
+ // The FP64A ABI (fp64 with nooddspreg) must also use a spill/reload sequence
+ // for odd-numbered double precision values (because the lower 32-bits is
+ // transferred with mfc1 which is redirected to the upper half of the even
+ // register). Unfortunately, we have to make this decision before register
+ // allocation so for now we use a spill/reload sequence for all
+ // double-precision values in regardless of being an odd/even register.
+
+ if ((Subtarget.isABI_FPXX() && !Subtarget.hasMTHC1()) ||
+ (FP64 && !Subtarget.useOddSPReg())) {
+ unsigned DstReg = I->getOperand(0).getReg();
+ unsigned SrcReg = I->getOperand(1).getReg();
+ unsigned N = I->getOperand(2).getImm();
+ int64_t Offset = 4 * (Subtarget.isLittle() ? N : (1 - N));
+
+ // It should be impossible to have FGR64 on MIPS-II or MIPS32r1 (which are
+ // the cases where mfhc1 is not available). 64-bit architectures and
+ // MIPS32r2 or later can use FGR64 though.
+ assert(Subtarget.isGP64bit() || Subtarget.hasMTHC1() ||
+ !Subtarget.isFP64bit());
+
+ const TargetRegisterClass *RC =
+ FP64 ? &Mips::FGR64RegClass : &Mips::AFGR64RegClass;
+ const TargetRegisterClass *RC2 = &Mips::GPR32RegClass;
+
+ // We re-use the same spill slot each time so that the stack frame doesn't
+ // grow too much in functions with a large number of moves.
+ int FI = MF.getInfo<MipsFunctionInfo>()->getMoveF64ViaSpillFI(RC);
+ TII.storeRegToStack(MBB, I, SrcReg, I->getOperand(1).isKill(), FI, RC,
+ &RegInfo, 0);
+ TII.loadRegFromStack(MBB, I, DstReg, FI, RC2, &RegInfo, Offset);
+ return true;
+ }
- return STI.isABI_N64() ? EhDataReg64[I] : EhDataReg[I];
+ return false;
}
-void MipsSEFrameLowering::emitPrologue(MachineFunction &MF) const {
- MachineBasicBlock &MBB = MF.front();
+MipsSEFrameLowering::MipsSEFrameLowering(const MipsSubtarget &STI)
+ : MipsFrameLowering(STI, STI.stackAlignment()) {}
+
+void MipsSEFrameLowering::emitPrologue(MachineFunction &MF,
+ MachineBasicBlock &MBB) const {
+ assert(&MF.front() == &MBB && "Shrink-wrapping not yet supported");
MachineFrameInfo *MFI = MF.getFrameInfo();
MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
const MipsSEInstrInfo &TII =
- *static_cast<const MipsSEInstrInfo*>(MF.getTarget().getInstrInfo());
+ *static_cast<const MipsSEInstrInfo *>(STI.getInstrInfo());
const MipsRegisterInfo &RegInfo =
- *static_cast<const MipsRegisterInfo*>(MF.getTarget().getRegisterInfo());
+ *static_cast<const MipsRegisterInfo *>(STI.getRegisterInfo());
MachineBasicBlock::iterator MBBI = MBB.begin();
DebugLoc dl = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
- unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
- unsigned FP = STI.isABI_N64() ? Mips::FP_64 : Mips::FP;
- unsigned ZERO = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
- unsigned ADDu = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
+ MipsABIInfo ABI = STI.getABI();
+ unsigned SP = ABI.GetStackPtr();
+ unsigned FP = ABI.GetFramePtr();
+ unsigned ZERO = ABI.GetNullPtr();
+ unsigned ADDu = ABI.GetPtrAdduOp();
+ unsigned ADDiu = ABI.GetPtrAddiuOp();
+ unsigned AND = ABI.IsN64() ? Mips::AND64 : Mips::AND;
+
+ const TargetRegisterClass *RC = ABI.ArePtrs64bit() ?
+ &Mips::GPR64RegClass : &Mips::GPR32RegClass;
// First, compute final stack size.
uint64_t StackSize = MFI->getStackSize();
MCCFIInstruction::createOffset(nullptr, Reg1, Offset + 4));
BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
.addCFIIndex(CFIIndex);
+ } else if (Mips::FGR64RegClass.contains(Reg)) {
+ unsigned Reg0 = MRI->getDwarfRegNum(Reg, true);
+ unsigned Reg1 = MRI->getDwarfRegNum(Reg, true) + 1;
+
+ if (!STI.isLittle())
+ std::swap(Reg0, Reg1);
+
+ unsigned CFIIndex = MMI.addFrameInst(
+ MCCFIInstruction::createOffset(nullptr, Reg0, Offset));
+ BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+ .addCFIIndex(CFIIndex);
+
+ CFIIndex = MMI.addFrameInst(
+ MCCFIInstruction::createOffset(nullptr, Reg1, Offset + 4));
+ BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+ .addCFIIndex(CFIIndex);
} else {
// Reg is either in GPR32 or FGR32.
unsigned CFIIndex = MMI.addFrameInst(MCCFIInstruction::createOffset(
}
if (MipsFI->callsEhReturn()) {
- const TargetRegisterClass *RC = STI.isABI_N64() ?
- &Mips::GPR64RegClass : &Mips::GPR32RegClass;
-
// Insert instructions that spill eh data registers.
for (int I = 0; I < 4; ++I) {
- if (!MBB.isLiveIn(ehDataReg(I)))
- MBB.addLiveIn(ehDataReg(I));
- TII.storeRegToStackSlot(MBB, MBBI, ehDataReg(I), false,
+ if (!MBB.isLiveIn(ABI.GetEhDataReg(I)))
+ MBB.addLiveIn(ABI.GetEhDataReg(I));
+ TII.storeRegToStackSlot(MBB, MBBI, ABI.GetEhDataReg(I), false,
MipsFI->getEhDataRegFI(I), RC, &RegInfo);
}
// Emit .cfi_offset directives for eh data registers.
for (int I = 0; I < 4; ++I) {
int64_t Offset = MFI->getObjectOffset(MipsFI->getEhDataRegFI(I));
- unsigned Reg = MRI->getDwarfRegNum(ehDataReg(I), true);
+ unsigned Reg = MRI->getDwarfRegNum(ABI.GetEhDataReg(I), true);
unsigned CFIIndex = MMI.addFrameInst(
MCCFIInstruction::createOffset(nullptr, Reg, Offset));
BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
nullptr, MRI->getDwarfRegNum(FP, true)));
BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
.addCFIIndex(CFIIndex);
+
+ if (RegInfo.needsStackRealignment(MF)) {
+ // addiu $Reg, $zero, -MaxAlignment
+ // andi $sp, $sp, $Reg
+ unsigned VR = MF.getRegInfo().createVirtualRegister(RC);
+ assert(isInt<16>(MFI->getMaxAlignment()) &&
+ "Function's alignment size requirement is not supported.");
+ int MaxAlign = - (signed) MFI->getMaxAlignment();
+
+ BuildMI(MBB, MBBI, dl, TII.get(ADDiu), VR).addReg(ZERO) .addImm(MaxAlign);
+ BuildMI(MBB, MBBI, dl, TII.get(AND), SP).addReg(SP).addReg(VR);
+
+ if (hasBP(MF)) {
+ // move $s7, $sp
+ unsigned BP = STI.isABI_N64() ? Mips::S7_64 : Mips::S7;
+ BuildMI(MBB, MBBI, dl, TII.get(ADDu), BP)
+ .addReg(SP)
+ .addReg(ZERO);
+ }
+ }
}
}
MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
const MipsSEInstrInfo &TII =
- *static_cast<const MipsSEInstrInfo*>(MF.getTarget().getInstrInfo());
+ *static_cast<const MipsSEInstrInfo *>(STI.getInstrInfo());
const MipsRegisterInfo &RegInfo =
- *static_cast<const MipsRegisterInfo*>(MF.getTarget().getRegisterInfo());
+ *static_cast<const MipsRegisterInfo *>(STI.getRegisterInfo());
DebugLoc dl = MBBI->getDebugLoc();
- unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
- unsigned FP = STI.isABI_N64() ? Mips::FP_64 : Mips::FP;
- unsigned ZERO = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
- unsigned ADDu = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
+ MipsABIInfo ABI = STI.getABI();
+ unsigned SP = ABI.GetStackPtr();
+ unsigned FP = ABI.GetFramePtr();
+ unsigned ZERO = ABI.GetNullPtr();
+ unsigned ADDu = ABI.GetPtrAdduOp();
// if framepointer enabled, restore the stack pointer.
if (hasFP(MF)) {
}
if (MipsFI->callsEhReturn()) {
- const TargetRegisterClass *RC = STI.isABI_N64() ?
- &Mips::GPR64RegClass : &Mips::GPR32RegClass;
+ const TargetRegisterClass *RC =
+ ABI.ArePtrs64bit() ? &Mips::GPR64RegClass : &Mips::GPR32RegClass;
// Find first instruction that restores a callee-saved register.
MachineBasicBlock::iterator I = MBBI;
// Insert instructions that restore eh data registers.
for (int J = 0; J < 4; ++J) {
- TII.loadRegFromStackSlot(MBB, I, ehDataReg(J), MipsFI->getEhDataRegFI(J),
- RC, &RegInfo);
+ TII.loadRegFromStackSlot(MBB, I, ABI.GetEhDataReg(J),
+ MipsFI->getEhDataRegFI(J), RC, &RegInfo);
}
}
const TargetRegisterInfo *TRI) const {
MachineFunction *MF = MBB.getParent();
MachineBasicBlock *EntryBlock = MF->begin();
- const TargetInstrInfo &TII = *MF->getTarget().getInstrInfo();
+ const TargetInstrInfo &TII = *STI.getInstrInfo();
for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
// Add the callee-saved register as live-in. Do not add if the register is
!MFI->hasVarSizedObjects();
}
-// Eliminate ADJCALLSTACKDOWN, ADJCALLSTACKUP pseudo instructions
-void MipsSEFrameLowering::
-eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I) const {
- const MipsSEInstrInfo &TII =
- *static_cast<const MipsSEInstrInfo*>(MF.getTarget().getInstrInfo());
-
- if (!hasReservedCallFrame(MF)) {
- int64_t Amount = I->getOperand(0).getImm();
-
- if (I->getOpcode() == Mips::ADJCALLSTACKDOWN)
- Amount = -Amount;
-
- unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
- TII.adjustStackPtr(SP, Amount, MBB, I);
- }
-
- MBB.erase(I);
-}
-
void MipsSEFrameLowering::
processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
RegScavenger *RS) const {
MachineRegisterInfo &MRI = MF.getRegInfo();
MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
- unsigned FP = STI.isABI_N64() ? Mips::FP_64 : Mips::FP;
+ MipsABIInfo ABI = STI.getABI();
+ unsigned FP = ABI.GetFramePtr();
+ unsigned BP = ABI.IsN64() ? Mips::S7_64 : Mips::S7;
// Mark $fp as used if function has dedicated frame pointer.
if (hasFP(MF))
MRI.setPhysRegUsed(FP);
+ // Mark $s7 as used if function has dedicated base pointer.
+ if (hasBP(MF))
+ MRI.setPhysRegUsed(BP);
// Create spill slots for eh data registers if function calls eh_return.
if (MipsFI->callsEhReturn())
if (isInt<16>(MaxSPOffset))
return;
- const TargetRegisterClass *RC = STI.isABI_N64() ?
- &Mips::GPR64RegClass : &Mips::GPR32RegClass;
+ const TargetRegisterClass *RC =
+ ABI.ArePtrs64bit() ? &Mips::GPR64RegClass : &Mips::GPR32RegClass;
int FI = MF.getFrameInfo()->CreateStackObject(RC->getSize(),
RC->getAlignment(), false);
RS->addScavengingFrameIndex(FI);
projects / oota-llvm.git / blobdiff