/// "(null)".
StringRef getName() const;
+ /// getFullName - Return a formatted string to identify this block and its
+ /// parent function.
+ std::string getFullName() const;
+
/// hasAddressTaken - Test whether this block is potentially the target
/// of an indirect branch.
bool hasAddressTaken() const { return AddressTaken; }
IterTy MII;
public:
- bundle_iterator(IterTy mii) : MII(mii) {
- assert(!MII->isInsideBundle() &&
- "It's not legal to initialize bundle_iterator with a bundled MI");
- }
+ bundle_iterator(IterTy mii) : MII(mii) {}
bundle_iterator(Ty &mi) : MII(mi) {
assert(!mi.isInsideBundle() &&
assert((!mi || !mi->isInsideBundle()) &&
"It's not legal to initialize bundle_iterator with a bundled MI");
}
- bundle_iterator(const bundle_iterator &I) : MII(I.MII) {}
+ // Template allows conversion from const to nonconst.
+ template<class OtherTy, class OtherIterTy>
+ bundle_iterator(const bundle_iterator<OtherTy, OtherIterTy> &I)
+ : MII(I.getInstrIterator()) {}
bundle_iterator() : MII(0) {}
Ty &operator*() const { return *MII; }
// Increment and decrement operators...
bundle_iterator &operator--() { // predecrement - Back up
- do {
- --MII;
- } while (MII->isInsideBundle());
+ do --MII;
+ while (MII->isInsideBundle());
return *this;
}
bundle_iterator &operator++() { // preincrement - Advance
- do {
- ++MII;
- } while (MII->isInsideBundle());
+ IterTy E = MII->getParent()->instr_end();
+ do ++MII;
+ while (MII != E && MII->isInsideBundle());
return *this;
}
bundle_iterator operator--(int) { // postdecrement operators...
bundle_iterator tmp = *this;
- do {
- --MII;
- } while (MII->isInsideBundle());
+ --*this;
return tmp;
}
bundle_iterator operator++(int) { // postincrement operators...
bundle_iterator tmp = *this;
- do {
- ++MII;
- } while (MII->isInsideBundle());
+ ++*this;
return tmp;
}
reverse_instr_iterator instr_rend () { return Insts.rend(); }
const_reverse_instr_iterator instr_rend () const { return Insts.rend(); }
- iterator begin() { return Insts.begin(); }
- const_iterator begin() const { return Insts.begin(); }
- iterator end() {
- instr_iterator II = instr_end();
- if (II != instr_begin()) {
- while (II->isInsideBundle())
- --II;
- }
- return II;
- }
- const_iterator end() const {
- const_instr_iterator II = instr_end();
- if (II != instr_begin()) {
- while (II->isInsideBundle())
- --II;
- }
- return II;
- }
- reverse_iterator rbegin() {
- reverse_instr_iterator II = instr_rbegin();
- if (II != instr_rend()) {
- while (II->isInsideBundle())
- ++II;
- }
- return II;
- }
- const_reverse_iterator rbegin() const {
- const_reverse_instr_iterator II = instr_rbegin();
- if (II != instr_rend()) {
- while (II->isInsideBundle())
- ++II;
- }
- return II;
- }
- reverse_iterator rend () { return Insts.rend(); }
- const_reverse_iterator rend () const { return Insts.rend(); }
+ iterator begin() { return instr_begin(); }
+ const_iterator begin() const { return instr_begin(); }
+ iterator end () { return instr_end(); }
+ const_iterator end () const { return instr_end(); }
+ reverse_iterator rbegin() { return instr_rbegin(); }
+ const_reverse_iterator rbegin() const { return instr_rbegin(); }
+ reverse_iterator rend () { return instr_rend(); }
+ const_reverse_iterator rend () const { return instr_rend(); }
// Machine-CFG iterators
/// parameter is stored in Weights list and it may be used by
/// MachineBranchProbabilityInfo analysis to calculate branch probability.
///
+ /// Note that duplicate Machine CFG edges are not allowed.
+ ///
void addSuccessor(MachineBasicBlock *succ, uint32_t weight = 0);
/// removeSuccessor - Remove successor from the successors list of this
/// which refer to fromMBB to refer to this.
void transferSuccessorsAndUpdatePHIs(MachineBasicBlock *fromMBB);
+ /// isPredecessor - Return true if the specified MBB is a predecessor of this
+ /// block.
+ bool isPredecessor(const MachineBasicBlock *MBB) const;
+
/// isSuccessor - Return true if the specified MBB is a successor of this
/// block.
bool isSuccessor(const MachineBasicBlock *MBB) const;
return findDebugLoc(MBBI.getInstrIterator());
}
+ /// Possible outcome of a register liveness query to computeRegisterLiveness()
+ enum LivenessQueryResult {
+ LQR_Live, ///< Register is known to be live.
+ LQR_OverlappingLive, ///< Register itself is not live, but some overlapping
+ ///< register is.
+ LQR_Dead, ///< Register is known to be dead.
+ LQR_Unknown ///< Register liveness not decidable from local
+ ///< neighborhood.
+ };
+
+ /// computeRegisterLiveness - Return whether (physical) register \c Reg
+ /// has been <def>ined and not <kill>ed as of just before \c MI.
+ ///
+ /// Search is localised to a neighborhood of
+ /// \c Neighborhood instructions before (searching for defs or kills) and
+ /// Neighborhood instructions after (searching just for defs) MI.
+ ///
+ /// \c Reg must be a physical register.
+ LivenessQueryResult computeRegisterLiveness(const TargetRegisterInfo *TRI,
+ unsigned Reg, MachineInstr *MI,
+ unsigned Neighborhood=10);
+
// Debugging methods.
void dump() const;
void print(raw_ostream &OS, SlotIndexes* = 0) const;
/// getSuccWeight - Return weight of the edge from this block to MBB. This
/// method should NOT be called directly, but by using getEdgeWeight method
/// from MachineBranchProbabilityInfo class.
- uint32_t getSuccWeight(const MachineBasicBlock *succ) const;
+ uint32_t getSuccWeight(const_succ_iterator Succ) const;
// Methods used to maintain doubly linked list of blocks...
}
};
-//===----------------------------------------------------------------------===//
-// MachineOperand iterator
-//
-
-/// MachineOperands - Iterator that can visit all operands on a MachineInstr,
-/// or all operands on a bundle of MachineInstrs.
-///
-/// Intended use:
-///
-/// for (MIOperands MIO(MI, true); MIO.isValid(); ++MIO) {
-/// if (!MIO->isReg())
-/// continue;
-/// ...
-/// }
-///
-class MIOperands {
- MachineBasicBlock::instr_iterator InstrI, InstrE;
- MachineInstr::mop_iterator OpI, OpE;
-
- // If the operands on InstrI are exhausted, advance InstrI to the next
- // bundled instruction with operands.
- void advance() {
- while (OpI == OpE) {
- // Don't advance off the basic block, or into a new bundle.
- if (++InstrI == InstrE || !InstrI->isInsideBundle())
- break;
- OpI = InstrI->operands_begin();
- OpE = InstrI->operands_end();
- }
- }
-
-public:
- /// MIOperands - Create an iterator that visits all operands on MI, or all
- /// operands on every instruction in the bundle containing MI.
- ///
- /// @param MI The instruction to examine.
- /// @param WholeBundle When true, visit all operands on the entire bundle.
- ///
- explicit MIOperands(MachineInstr *MI, bool WholeBundle = false) {
- if (WholeBundle) {
- InstrI = MI->getBundleStart();
- InstrE = MI->getParent()->instr_end();
- } else {
- InstrI = InstrE = MI;
- ++InstrE;
- }
- OpI = InstrI->operands_begin();
- OpE = InstrI->operands_end();
- if (WholeBundle)
- advance();
- }
-
- /// isValid - Returns true until all the operands have been visited.
- bool isValid() const { return OpI != OpE; }
-
- /// Preincrement. Move to the next operand.
- MIOperands &operator++() {
- assert(isValid() && "Cannot advance MIOperands beyond the last operand");
- ++OpI;
- advance();
- return *this;
- }
-
- MachineOperand &operator* () const { return *OpI; }
- MachineOperand *operator->() const { return &*OpI; }
-};
-
} // End llvm namespace
#endif
projects / oota-llvm.git / blobdiff