static bool clobbersAllYmmRegs(const MachineOperand &MO) {
for (unsigned reg = X86::YMM0; reg < X86::YMM31; ++reg) {
if (!MO.clobbersPhysReg(reg))
return false;
}
for (unsigned reg = X86::ZMM0; reg < X86::ZMM31; ++reg) {
if (!MO.clobbersPhysReg(reg))
return false;
}
return true;
}
void AArch64A57FPLoadBalancing::
maybeKillChain(MachineOperand &MO, unsigned Idx,
std::map<unsigned, Chain*> &ActiveChains) {
// Given an operand and the set of active chains (keyed by register),
// determine if a chain should be ended and remove from ActiveChains.
MachineInstr *MI = MO.getParent();
if (MO.isReg()) {
// If this is a KILL of a current chain, record it.
if (MO.isKill() && ActiveChains.find(MO.getReg()) != ActiveChains.end()) {
DEBUG(dbgs() << "Kill seen for chain " << TRI->getName(MO.getReg())
<< "\n");
ActiveChains[MO.getReg()]->setKill(MI, Idx, /*Immutable=*/MO.isTied());
}
ActiveChains.erase(MO.getReg());
} else if (MO.isRegMask()) {
for (auto I = ActiveChains.begin(), E = ActiveChains.end();
I != E;) {
if (MO.clobbersPhysReg(I->first)) {
DEBUG(dbgs() << "Kill (regmask) seen for chain "
<< TRI->getName(I->first) << "\n");
I->second->setKill(MI, Idx, /*Immutable=*/true);
ActiveChains.erase(I++);
} else
++I;
}
}
}
/// \brief Remove all registers from the set that get clobbered by the register
/// mask.
void LivePhysRegs::removeRegsInMask(const MachineOperand &MO) {
SparseSet<unsigned>::iterator LRI = LiveRegs.begin();
while (LRI != LiveRegs.end()) {
if (MO.clobbersPhysReg(*LRI))
LRI = LiveRegs.erase(LRI);
else
++LRI;
}
}
/// Remove any entry in \p Map that is marked clobbered in \p RegMask.
/// The map will typically have a lot fewer entries than the regmask clobbers,
/// so this is more efficient than iterating the clobbered registers and calling
/// ClobberRegister() on them.
static void removeClobberedRegsFromMap(Reg2MIMap &Map,
const MachineOperand &RegMask) {
for (Reg2MIMap::iterator I = Map.begin(), E = Map.end(), Next; I != E;
I = Next) {
Next = std::next(I);
unsigned Reg = I->first;
if (RegMask.clobbersPhysReg(Reg))
Map.erase(I);
}
}
void LiveVariables::HandleRegMask(const MachineOperand &MO) {
// Call HandlePhysRegKill() for all live registers clobbered by Mask.
// Clobbered registers are always dead, sp there is no need to use
// HandlePhysRegDef().
for (unsigned Reg = 1, NumRegs = TRI->getNumRegs(); Reg != NumRegs; ++Reg) {
// Skip dead regs.
if (!PhysRegDef[Reg] && !PhysRegUse[Reg])
continue;
// Skip mask-preserved regs.
if (!MO.clobbersPhysReg(Reg))
continue;
// Kill the largest clobbered super-register.
// This avoids needless implicit operands.
unsigned Super = Reg;
for (MCSuperRegIterator SR(Reg, TRI); SR.isValid(); ++SR)
if ((PhysRegDef[*SR] || PhysRegUse[*SR]) && MO.clobbersPhysReg(*SR))
Super = *SR;
HandlePhysRegKill(Super, nullptr);
}
}
/// \brief Remove all registers from the set that get clobbered by the register
/// mask.
/// The clobbers set will be the list of live registers clobbered
/// by the regmask.
void LivePhysRegs::removeRegsInMask(const MachineOperand &MO,
SmallVectorImpl<std::pair<unsigned, const MachineOperand*>> *Clobbers) {
SparseSet<unsigned>::iterator LRI = LiveRegs.begin();
while (LRI != LiveRegs.end()) {
if (MO.clobbersPhysReg(*LRI)) {
if (Clobbers)
Clobbers->push_back(std::make_pair(*LRI, &MO));
LRI = LiveRegs.erase(LRI);
} else
++LRI;
}
}
