#include "Mips16InstrInfo.h"
#include "MipsInstrInfo.h"
#include "MipsRegisterInfo.h"
+#include "MipsSubtarget.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
using namespace llvm;
-void Mips16FrameLowering::emitPrologue(MachineFunction &MF) const {
- MachineBasicBlock &MBB = MF.front();
+Mips16FrameLowering::Mips16FrameLowering(const MipsSubtarget &STI)
+ : MipsFrameLowering(STI, STI.stackAlignment()) {}
+
+void Mips16FrameLowering::emitPrologue(MachineFunction &MF,
+ MachineBasicBlock &MBB) const {
+ assert(&MF.front() == &MBB && "Shrink-wrapping not yet supported");
MachineFrameInfo *MFI = MF.getFrameInfo();
const Mips16InstrInfo &TII =
- *static_cast<const Mips16InstrInfo*>(MF.getTarget().getInstrInfo());
+ *static_cast<const Mips16InstrInfo *>(STI.getInstrInfo());
MachineBasicBlock::iterator MBBI = MBB.begin();
DebugLoc dl = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
uint64_t StackSize = MFI->getStackSize();
TII.makeFrame(Mips::SP, StackSize, MBB, MBBI);
// emit ".cfi_def_cfa_offset StackSize"
- MCSymbol *AdjustSPLabel = MMI.getContext().CreateTempSymbol();
- BuildMI(MBB, MBBI, dl,
- TII.get(TargetOpcode::PROLOG_LABEL)).addSym(AdjustSPLabel);
- MMI.addFrameInst(
- MCCFIInstruction::createDefCfaOffset(AdjustSPLabel, -StackSize));
-
- MCSymbol *CSLabel = MMI.getContext().CreateTempSymbol();
- BuildMI(MBB, MBBI, dl,
- TII.get(TargetOpcode::PROLOG_LABEL)).addSym(CSLabel);
-
-
- const MipsRegisterInfo &RI = TII.getRegisterInfo();
- const BitVector Reserved = RI.getReservedRegs(MF);
- bool SaveS2 = Reserved[Mips::S2];
- int Offset=-4;
- unsigned RA = MRI->getDwarfRegNum(Mips::RA, true);
- MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, RA, Offset));
- Offset -= 4;
-
- if (SaveS2) {
- unsigned S2 = MRI->getDwarfRegNum(Mips::S2, true);
- MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, S2, Offset));
- Offset -= 4;
+ unsigned CFIIndex = MMI.addFrameInst(
+ MCCFIInstruction::createDefCfaOffset(nullptr, -StackSize));
+ BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+ .addCFIIndex(CFIIndex);
+
+ const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
+
+ if (CSI.size()) {
+ const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
+
+ for (std::vector<CalleeSavedInfo>::const_iterator I = CSI.begin(),
+ E = CSI.end(); I != E; ++I) {
+ int64_t Offset = MFI->getObjectOffset(I->getFrameIdx());
+ unsigned Reg = I->getReg();
+ unsigned DReg = MRI->getDwarfRegNum(Reg, true);
+ unsigned CFIIndex = MMI.addFrameInst(
+ MCCFIInstruction::createOffset(nullptr, DReg, Offset));
+ BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+ .addCFIIndex(CFIIndex);
+ }
}
-
-
- unsigned S1 = MRI->getDwarfRegNum(Mips::S1, true);
- MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, S1, Offset));
- Offset -= 4;
-
- unsigned S0 = MRI->getDwarfRegNum(Mips::S0, true);
- MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, S0, Offset));
-
-
-
if (hasFP(MF))
BuildMI(MBB, MBBI, dl, TII.get(Mips::MoveR3216), Mips::S0)
- .addReg(Mips::SP);
+ .addReg(Mips::SP).setMIFlag(MachineInstr::FrameSetup);
}
MachineBasicBlock::iterator MBBI = MBB.getLastNonDebugInstr();
MachineFrameInfo *MFI = MF.getFrameInfo();
const Mips16InstrInfo &TII =
- *static_cast<const Mips16InstrInfo*>(MF.getTarget().getInstrInfo());
+ *static_cast<const Mips16InstrInfo *>(STI.getInstrInfo());
DebugLoc dl = MBBI->getDebugLoc();
uint64_t StackSize = MFI->getStackSize();
return true;
}
-// Eliminate ADJCALLSTACKDOWN, ADJCALLSTACKUP pseudo instructions
-void Mips16FrameLowering::
-eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I) const {
- if (!hasReservedCallFrame(MF)) {
- int64_t Amount = I->getOperand(0).getImm();
-
- if (I->getOpcode() == Mips::ADJCALLSTACKDOWN)
- Amount = -Amount;
-
- const Mips16InstrInfo &TII =
- *static_cast<const Mips16InstrInfo*>(MF.getTarget().getInstrInfo());
-
- TII.adjustStackPtr(Mips::SP, Amount, MBB, I);
- }
-
- MBB.erase(I);
-}
-
bool
Mips16FrameLowering::hasReservedCallFrame(const MachineFunction &MF) const {
const MachineFrameInfo *MFI = MF.getFrameInfo();
void Mips16FrameLowering::
processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
RegScavenger *RS) const {
- MF.getRegInfo().setPhysRegUsed(Mips::RA);
- MF.getRegInfo().setPhysRegUsed(Mips::S0);
- MF.getRegInfo().setPhysRegUsed(Mips::S1);
- MF.getRegInfo().setPhysRegUsed(Mips::S2);
+ const Mips16InstrInfo &TII =
+ *static_cast<const Mips16InstrInfo *>(STI.getInstrInfo());
+ const MipsRegisterInfo &RI = TII.getRegisterInfo();
+ const BitVector Reserved = RI.getReservedRegs(MF);
+ bool SaveS2 = Reserved[Mips::S2];
+ if (SaveS2)
+ MF.getRegInfo().setPhysRegUsed(Mips::S2);
+ if (hasFP(MF))
+ MF.getRegInfo().setPhysRegUsed(Mips::S0);
}
const MipsFrameLowering *