#include "SparcFrameLowering.h"
#include "SparcInstrInfo.h"
#include "SparcMachineFunctionInfo.h"
+#include "SparcSubtarget.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
cl::desc("Disable Sparc leaf procedure optimization."),
cl::Hidden);
+SparcFrameLowering::SparcFrameLowering(const SparcSubtarget &ST)
+ : TargetFrameLowering(TargetFrameLowering::StackGrowsDown,
+ ST.is64Bit() ? 16 : 8, 0, ST.is64Bit() ? 16 : 8) {}
void SparcFrameLowering::emitSPAdjustment(MachineFunction &MF,
MachineBasicBlock &MBB,
DebugLoc dl = (MBBI != MBB.end()) ? MBBI->getDebugLoc() : DebugLoc();
const SparcInstrInfo &TII =
- *static_cast<const SparcInstrInfo*>(MF.getTarget().getInstrInfo());
+ *static_cast<const SparcInstrInfo *>(MF.getSubtarget().getInstrInfo());
if (NumBytes >= -4096 && NumBytes < 4096) {
BuildMI(MBB, MBBI, dl, TII.get(ADDri), SP::O6)
.addReg(SP::O6).addReg(SP::G1);
}
-void SparcFrameLowering::emitPrologue(MachineFunction &MF) const {
+void SparcFrameLowering::emitPrologue(MachineFunction &MF,
+ MachineBasicBlock &MBB) const {
SparcMachineFunctionInfo *FuncInfo = MF.getInfo<SparcMachineFunctionInfo>();
- MachineBasicBlock &MBB = MF.front();
+ assert(&MF.front() == &MBB && "Shrink-wrapping not yet supported");
MachineFrameInfo *MFI = MF.getFrameInfo();
const SparcInstrInfo &TII =
- *static_cast<const SparcInstrInfo*>(MF.getTarget().getInstrInfo());
+ *static_cast<const SparcInstrInfo *>(MF.getSubtarget().getInstrInfo());
MachineBasicBlock::iterator MBBI = MBB.begin();
DebugLoc dl = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
SAVEri = SP::ADDri;
SAVErr = SP::ADDrr;
}
- NumBytes = - SubTarget.getAdjustedFrameSize(NumBytes);
+ NumBytes = -MF.getSubtarget<SparcSubtarget>().getAdjustedFrameSize(NumBytes);
emitSPAdjustment(MF, MBB, MBBI, NumBytes, SAVErr, SAVEri);
MachineModuleInfo &MMI = MF.getMMI();
const MCRegisterInfo *MRI = MMI.getContext().getRegisterInfo();
- MCSymbol *FrameLabel = MMI.getContext().CreateTempSymbol();
- BuildMI(MBB, MBBI, dl, TII.get(SP::PROLOG_LABEL)).addSym(FrameLabel);
-
unsigned regFP = MRI->getDwarfRegNum(SP::I6, true);
// Emit ".cfi_def_cfa_register 30".
- MMI.addFrameInst(MCCFIInstruction::createDefCfaRegister(FrameLabel,
- regFP));
+ unsigned CFIIndex =
+ MMI.addFrameInst(MCCFIInstruction::createDefCfaRegister(nullptr, regFP));
+ BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+ .addCFIIndex(CFIIndex);
+
// Emit ".cfi_window_save".
- MMI.addFrameInst(MCCFIInstruction::createWindowSave(FrameLabel));
+ CFIIndex = MMI.addFrameInst(MCCFIInstruction::createWindowSave(nullptr));
+ BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+ .addCFIIndex(CFIIndex);
unsigned regInRA = MRI->getDwarfRegNum(SP::I7, true);
unsigned regOutRA = MRI->getDwarfRegNum(SP::O7, true);
// Emit ".cfi_register 15, 31".
- MMI.addFrameInst(MCCFIInstruction::createRegister(FrameLabel,
- regOutRA,
- regInRA));
+ CFIIndex = MMI.addFrameInst(
+ MCCFIInstruction::createRegister(nullptr, regOutRA, regInRA));
+ BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+ .addCFIIndex(CFIIndex);
}
void SparcFrameLowering::
MachineBasicBlock::iterator I) const {
if (!hasReservedCallFrame(MF)) {
MachineInstr &MI = *I;
- DebugLoc DL = MI.getDebugLoc();
int Size = MI.getOperand(0).getImm();
if (MI.getOpcode() == SP::ADJCALLSTACKDOWN)
Size = -Size;
SparcMachineFunctionInfo *FuncInfo = MF.getInfo<SparcMachineFunctionInfo>();
MachineBasicBlock::iterator MBBI = MBB.getLastNonDebugInstr();
const SparcInstrInfo &TII =
- *static_cast<const SparcInstrInfo*>(MF.getTarget().getInstrInfo());
+ *static_cast<const SparcInstrInfo *>(MF.getSubtarget().getInstrInfo());
DebugLoc dl = MBBI->getDebugLoc();
assert(MBBI->getOpcode() == SP::RETL &&
"Can only put epilog before 'retl' instruction!");
if (NumBytes == 0)
return;
- NumBytes = SubTarget.getAdjustedFrameSize(NumBytes);
+ NumBytes = MF.getSubtarget<SparcSubtarget>().getAdjustedFrameSize(NumBytes);
emitSPAdjustment(MF, MBB, MBBI, NumBytes, SP::ADDrr, SP::ADDri);
}
{
for (unsigned reg = SP::I0; reg <= SP::I7; ++reg)
- if (MRI->isPhysRegUsed(reg))
+ if (!MRI->reg_nodbg_empty(reg))
return false;
for (unsigned reg = SP::L0; reg <= SP::L7; ++reg)
- if (MRI->isPhysRegUsed(reg))
+ if (!MRI->reg_nodbg_empty(reg))
return false;
return true;
MachineRegisterInfo &MRI = MF.getRegInfo();
MachineFrameInfo *MFI = MF.getFrameInfo();
- return !(MFI->hasCalls() // has calls
- || MRI.isPhysRegUsed(SP::L0) // Too many registers needed
- || MRI.isPhysRegUsed(SP::O6) // %SP is used
- || hasFP(MF)); // need %FP
+ return !(MFI->hasCalls() // has calls
+ || !MRI.reg_nodbg_empty(SP::L0) // Too many registers needed
+ || !MRI.reg_nodbg_empty(SP::O6) // %SP is used
+ || hasFP(MF)); // need %FP
}
void SparcFrameLowering::remapRegsForLeafProc(MachineFunction &MF) const {
-
MachineRegisterInfo &MRI = MF.getRegInfo();
-
// Remap %i[0-7] to %o[0-7].
for (unsigned reg = SP::I0; reg <= SP::I7; ++reg) {
- if (!MRI.isPhysRegUsed(reg))
+ if (MRI.reg_nodbg_empty(reg))
continue;
- unsigned mapped_reg = (reg - SP::I0 + SP::O0);
- assert(!MRI.isPhysRegUsed(mapped_reg));
+
+ unsigned mapped_reg = reg - SP::I0 + SP::O0;
+ assert(MRI.reg_nodbg_empty(mapped_reg));
// Replace I register with O register.
MRI.replaceRegWith(reg, mapped_reg);
- // Mark the reg unused.
- MRI.setPhysRegUnused(reg);
+ // Also replace register pair super-registers.
+ if ((reg - SP::I0) % 2 == 0) {
+ unsigned preg = (reg - SP::I0) / 2 + SP::I0_I1;
+ unsigned mapped_preg = preg - SP::I0_I1 + SP::O0_O1;
+ MRI.replaceRegWith(preg, mapped_preg);
+ }
}
// Rewrite MBB's Live-ins.
for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
MBB != E; ++MBB) {
+ for (unsigned reg = SP::I0_I1; reg <= SP::I6_I7; ++reg) {
+ if (!MBB->isLiveIn(reg))
+ continue;
+ MBB->removeLiveIn(reg);
+ MBB->addLiveIn(reg - SP::I0_I1 + SP::O0_O1);
+ }
for (unsigned reg = SP::I0; reg <= SP::I7; ++reg) {
if (!MBB->isLiveIn(reg))
continue;
#endif
}
-void SparcFrameLowering::processFunctionBeforeCalleeSavedScan
- (MachineFunction &MF, RegScavenger *RS) const {
-
+void SparcFrameLowering::determineCalleeSaves(MachineFunction &MF,
+ BitVector &SavedRegs,
+ RegScavenger *RS) const {
+ TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS);
if (!DisableLeafProc && isLeafProc(MF)) {
SparcMachineFunctionInfo *MFI = MF.getInfo<SparcMachineFunctionInfo>();
MFI->setLeafProc(true);
projects / oota-llvm.git / blobdiff