#include "llvm/DerivedTypes.h"
using namespace llvm;
-TargetInstrInfo::TargetInstrInfo(const TargetInstrDescriptor* Desc,
- unsigned numOpcodes)
- : desc(Desc), NumOpcodes(numOpcodes) {
-}
-
-TargetInstrInfo::~TargetInstrInfo() {
-}
-
/// findTiedToSrcOperand - Returns the operand that is tied to the specified
/// dest operand. Returns -1 if there isn't one.
-int
-TargetInstrInfo::findTiedToSrcOperand(MachineOpCode Opc, unsigned OpNum) const {
- for (unsigned i = 0, e = getNumOperands(Opc); i != e; ++i) {
+int TargetInstrDescriptor::findTiedToSrcOperand(unsigned OpNum) const {
+ for (unsigned i = 0, e = numOperands; i != e; ++i) {
if (i == OpNum)
continue;
- int ti = getOperandConstraint(Opc, i, TOI::TIED_TO);
- if (ti == (int)OpNum)
+ if (getOperandConstraint(i, TOI::TIED_TO) == (int)OpNum)
return i;
}
return -1;
}
+TargetInstrInfo::TargetInstrInfo(const TargetInstrDescriptor* Desc,
+ unsigned numOpcodes)
+ : desc(Desc), NumOpcodes(numOpcodes) {
+}
+
+TargetInstrInfo::~TargetInstrInfo() {
+}
+
// commuteInstruction - The default implementation of this method just exchanges
// operand 1 and 2.
MachineInstr *TargetInstrInfo::commuteInstruction(MachineInstr *MI) const {
MI->getOperand(1).unsetIsKill();
return MI;
}
+
+bool TargetInstrInfo::PredicateInstruction(MachineInstr *MI,
+ const std::vector<MachineOperand> &Pred) const {
+ bool MadeChange = false;
+ const TargetInstrDescriptor *TID = MI->getInstrDescriptor();
+ if (TID->Flags & M_PREDICABLE) {
+ for (unsigned j = 0, i = 0, e = MI->getNumOperands(); i != e; ++i) {
+ if ((TID->OpInfo[i].Flags & M_PREDICATE_OPERAND)) {
+ MachineOperand &MO = MI->getOperand(i);
+ if (MO.isReg()) {
+ MO.setReg(Pred[j].getReg());
+ MadeChange = true;
+ } else if (MO.isImm()) {
+ MO.setImm(Pred[j].getImmedValue());
+ MadeChange = true;
+ } else if (MO.isMBB()) {
+ MO.setMachineBasicBlock(Pred[j].getMachineBasicBlock());
+ MadeChange = true;
+ }
+ ++j;
+ }
+ }
+ }
+ return MadeChange;
+}
+
+bool TargetInstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {
+ const TargetInstrDescriptor *TID = MI->getInstrDescriptor();
+ if (TID->Flags & M_TERMINATOR_FLAG) {
+ // Conditional branch is a special case.
+ if ((TID->Flags & M_BRANCH_FLAG) != 0 && (TID->Flags & M_BARRIER_FLAG) == 0)
+ return true;
+ if ((TID->Flags & M_PREDICABLE) == 0)
+ return true;
+ return !isPredicated(MI);
+ }
+ return false;
+}