/// explicitly nulled out.
void MachineOperand::AddRegOperandToRegInfo(MachineRegisterInfo *RegInfo) {
assert(isReg() && "Can only add reg operand to use lists");
-
+
// If the reginfo pointer is null, just explicitly null out or next/prev
// pointers, to ensure they are not garbage.
if (RegInfo == 0) {
Contents.Reg.Next = 0;
return;
}
-
+
// Otherwise, add this operand to the head of the registers use/def list.
MachineOperand **Head = &RegInfo->getRegUseDefListHead(getReg());
-
+
// For SSA values, we prefer to keep the definition at the start of the list.
// we do this by skipping over the definition if it is at the head of the
// list.
if (*Head && (*Head)->isDef())
Head = &(*Head)->Contents.Reg.Next;
-
+
Contents.Reg.Next = *Head;
if (Contents.Reg.Next) {
assert(getReg() == Contents.Reg.Next->getReg() &&
"Different regs on the same list!");
Contents.Reg.Next->Contents.Reg.Prev = &Contents.Reg.Next;
}
-
+
Contents.Reg.Prev = Head;
*Head = this;
}
assert(isOnRegUseList() && "Reg operand is not on a use list");
// Unlink this from the doubly linked list of operands.
MachineOperand *NextOp = Contents.Reg.Next;
- *Contents.Reg.Prev = NextOp;
+ *Contents.Reg.Prev = NextOp;
if (NextOp) {
assert(NextOp->getReg() == getReg() && "Corrupt reg use/def chain!");
NextOp->Contents.Reg.Prev = Contents.Reg.Prev;
void MachineOperand::setReg(unsigned Reg) {
if (getReg() == Reg) return; // No change.
-
+
// Otherwise, we have to change the register. If this operand is embedded
// into a machine function, we need to update the old and new register's
// use/def lists.
AddRegOperandToRegInfo(&MF->getRegInfo());
return;
}
-
+
// Otherwise, just change the register, no problem. :)
SmallContents.RegNo = Reg;
}
if (isReg() && getParent() && getParent()->getParent() &&
getParent()->getParent()->getParent())
RemoveRegOperandFromRegInfo();
-
+
OpKind = MO_Immediate;
Contents.ImmVal = ImmVal;
}
void MachineOperand::ChangeToRegister(unsigned Reg, bool isDef, bool isImp,
bool isKill, bool isDead, bool isUndef,
bool isDebug) {
- // If this operand is already a register operand, use setReg to update the
+ // If this operand is already a register operand, use setReg to update the
// register's use/def lists.
if (isReg()) {
assert(!isEarlyClobber());
if (getType() != Other.getType() ||
getTargetFlags() != Other.getTargetFlags())
return false;
-
+
switch (getType()) {
default: llvm_unreachable("Unrecognized operand type");
case MachineOperand::MO_Register:
default:
llvm_unreachable("Unrecognized operand type");
}
-
+
if (unsigned TF = getTargetFlags())
OS << "[TF=" << TF << ']';
}
raw_ostream &llvm::operator<<(raw_ostream &OS, const MachineMemOperand &MMO) {
assert((MMO.isLoad() || MMO.isStore()) &&
"SV has to be a load, store or both.");
-
+
if (MMO.isVolatile())
OS << "Volatile ";
if (MMO.isStore())
OS << "ST";
OS << MMO.getSize();
-
+
// Print the address information.
OS << "[";
if (!MMO.getValue())
}
/// MachineInstr ctor - Work exactly the same as the ctor two above, except
-/// that the MachineInstr is created and added to the end of the specified
+/// that the MachineInstr is created and added to the end of the specified
/// basic block.
MachineInstr::MachineInstr(MachineBasicBlock *MBB, const MCInstrDesc &tid)
: MCID(&tid), NumImplicitOps(0), Flags(0), AsmPrinterFlags(0),
/// addOperand - Add the specified operand to the instruction. If it is an
/// implicit operand, it is added to the end of the operand list. If it is
/// an explicit operand it is added at the end of the explicit operand list
-/// (before the first implicit operand).
+/// (before the first implicit operand).
void MachineInstr::addOperand(const MachineOperand &Op) {
bool isImpReg = Op.isReg() && Op.isImplicit();
assert((isImpReg || !OperandsComplete()) &&
// reallocate.
if (Operands.empty() || Operands.size()+1 <= Operands.capacity()) {
Operands.push_back(Op);
-
+
// Set the parent of the operand.
Operands.back().ParentMI = this;
-
+
// If the operand is a register, update the operand's use list.
if (Op.isReg()) {
Operands.back().AddRegOperandToRegInfo(RegInfo);
return;
}
}
-
+
// Otherwise, we have to insert a real operand before any implicit ones.
unsigned OpNo = Operands.size()-NumImplicitOps;
// list, add the operand, then add the register operands back to their use
// list. This also must handle the case when the operand list reallocates
// to somewhere else.
-
+
// If insertion of this operand won't cause reallocation of the operand
// list, just remove the implicit operands, add the operand, then re-add all
// the rest of the operands.
assert(Operands[i].isReg() && "Should only be an implicit reg!");
Operands[i].RemoveRegOperandFromRegInfo();
}
-
+
// Add the operand. If it is a register, add it to the reg list.
Operands.insert(Operands.begin()+OpNo, Op);
Operands[OpNo].ParentMI = this;
if (MCID->getOperandConstraint(OpNo, MCOI::EARLY_CLOBBER) != -1)
Operands[OpNo].setIsEarlyClobber(true);
}
-
+
// Re-add all the implicit ops.
for (unsigned i = OpNo+1, e = Operands.size(); i != e; ++i) {
assert(Operands[i].isReg() && "Should only be an implicit reg!");
// operands from their list, then readd them after the operand list is
// reallocated.
RemoveRegOperandsFromUseLists();
-
+
Operands.insert(Operands.begin()+OpNo, Op);
Operands[OpNo].ParentMI = this;
-
+
// Re-add all the operands.
AddRegOperandsToUseLists(*RegInfo);
///
void MachineInstr::RemoveOperand(unsigned OpNo) {
assert(OpNo < Operands.size() && "Invalid operand number");
-
+
// Special case removing the last one.
if (OpNo == Operands.size()-1) {
// If needed, remove from the reg def/use list.
if (Operands.back().isReg() && Operands.back().isOnRegUseList())
Operands.back().RemoveRegOperandFromRegInfo();
-
+
Operands.pop_back();
return;
}
Operands[i].RemoveRegOperandFromRegInfo();
}
}
-
+
Operands.erase(Operands.begin()+OpNo);
if (RegInfo) {
return -1;
}
-
+
/// isRegTiedToUseOperand - Given the index of a register def operand,
/// check if the register def is tied to a source operand, due to either
/// two-address elimination or inline assembly constraints. Returns the
// conservatively assume it wasn't preserved.
if (memoperands_empty())
return true;
-
+
// Check the memory reference information for volatile references.
for (mmo_iterator I = memoperands_begin(), E = memoperands_end(); I != E; ++I)
if ((*I)->isVolatile())
dbgs() << " " << *this;
}
-static void printDebugLoc(DebugLoc DL, const MachineFunction *MF,
+static void printDebugLoc(DebugLoc DL, const MachineFunction *MF,
raw_ostream &CommentOS) {
const LLVMContext &Ctx = MF->getFunction()->getContext();
if (!DL.isUnknown()) { // Print source line info.
// new implicit operand if required.
if (Found || !AddIfNotFound)
return Found;
-
+
addOperand(MachineOperand::CreateReg(IncomingReg,
true /*IsDef*/,
true /*IsImp*/,
projects / oota-llvm.git / commitdiff