#ifndef LLVM_CODEGEN_LIVEINTERVAL_ANALYSIS_H
#define LLVM_CODEGEN_LIVEINTERVAL_ANALYSIS_H
-#include "llvm/ADT/DenseMap.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/LiveInterval.h"
+#include "llvm/ADT/BitVector.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/IndexedMap.h"
namespace llvm {
class LiveVariables;
class MRegisterInfo;
class TargetInstrInfo;
+ class TargetRegisterClass;
class VirtRegMap;
class LiveIntervals : public MachineFunctionPass {
const TargetInstrInfo* tii_;
LiveVariables* lv_;
+ /// MBB2IdxMap - The index of the first instruction in the specified basic
+ /// block.
+ std::vector<unsigned> MBB2IdxMap;
+
typedef std::map<MachineInstr*, unsigned> Mi2IndexMap;
Mi2IndexMap mi2iMap_;
typedef std::map<unsigned, LiveInterval> Reg2IntervalMap;
Reg2IntervalMap r2iMap_;
- typedef DenseMap<unsigned> Reg2RegMap;
+ typedef IndexedMap<unsigned> Reg2RegMap;
Reg2RegMap r2rMap_;
- std::vector<bool> allocatableRegs_;
+ BitVector allocatableRegs_;
+ DenseMap<const TargetRegisterClass*, BitVector> allocatableRCRegs_;
+
+ /// JoinedLIs - Keep track which register intervals have been coalesced
+ /// with other intervals.
+ BitVector JoinedLIs;
public:
struct CopyRec {
return I->second;
}
+ bool hasInterval(unsigned reg) const {
+ return r2iMap_.count(reg);
+ }
+
+ /// getMBBStartIdx - Return the base index of the first instruction in the
+ /// specified MachineBasicBlock.
+ unsigned getMBBStartIdx(MachineBasicBlock *MBB) const {
+ return getMBBStartIdx(MBB->getNumber());
+ }
+
+ unsigned getMBBStartIdx(unsigned MBBNo) const {
+ assert(MBBNo < MBB2IdxMap.size() && "Invalid MBB number!");
+ return MBB2IdxMap[MBBNo];
+ }
+
/// getInstructionIndex - returns the base index of instr
unsigned getInstructionIndex(MachineInstr* instr) const {
Mi2IndexMap::const_iterator it = mi2iMap_.find(instr);
"index does not correspond to an instruction");
return i2miMap_[index];
}
-
+
std::vector<LiveInterval*> addIntervalsForSpills(const LiveInterval& i,
VirtRegMap& vrm,
int slot);
+ /// CreateNewLiveInterval - Create a new live interval with the given live
+ /// ranges. The new live interval will have an infinite spill weight.
+ LiveInterval &CreateNewLiveInterval(const LiveInterval *LI,
+ const std::vector<LiveRange> &LRs);
+
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
virtual void releaseMemory();
/// print - Implement the dump method.
virtual void print(std::ostream &O, const Module* = 0) const;
+ void print(std::ostream *O, const Module* M = 0) const {
+ if (O) print(*O, M);
+ }
private:
+ /// isRemoved - returns true if the specified machine instr has been
+ /// removed.
+ bool isRemoved(MachineInstr* instr) const {
+ return !mi2iMap_.count(instr);
+ }
+
/// RemoveMachineInstrFromMaps - This marks the specified machine instr as
/// deleted.
void RemoveMachineInstrFromMaps(MachineInstr *MI) {
}
}
- /// computeIntervals - compute live intervals
+ /// computeIntervals - Compute live intervals.
void computeIntervals();
/// joinIntervals - join compatible live intervals
/// CopyCoallesceInMBB - Coallsece copies in the specified MBB, putting
/// copies that cannot yet be coallesced into the "TryAgain" list.
void CopyCoallesceInMBB(MachineBasicBlock *MBB,
- std::vector<CopyRec> &TryAgain);
+ std::vector<CopyRec> *TryAgain, bool PhysOnly = false);
+
/// JoinCopy - Attempt to join intervals corresponding to SrcReg/DstReg,
/// which are the src/dst of the copy instruction CopyMI. This returns true
/// if the copy was successfully coallesced away, or if it is never possible
/// to coallesce these this copy, due to register constraints. It returns
/// false if it is not currently possible to coallesce this interval, but
/// it may be possible if other things get coallesced.
- bool JoinCopy(MachineInstr *CopyMI, unsigned SrcReg, unsigned DstReg);
+ bool JoinCopy(MachineInstr *CopyMI, unsigned SrcReg, unsigned DstReg,
+ bool PhysOnly = false);
/// JoinIntervals - Attempt to join these two intervals. On failure, this
/// returns false. Otherwise, if one of the intervals being joined is a
/// below to update aliases.
bool JoinIntervals(LiveInterval &LHS, LiveInterval &RHS);
- /// SimpleJoin - Attempt to joint the specified interval into this one. The
+ /// SimpleJoin - Attempt to join the specified interval into this one. The
/// caller of this method must guarantee that the RHS only contains a single
/// value number and that the RHS is not defined by a copy from this
/// interval. This returns false if the intervals are not joinable, or it
/// handleRegisterDef - update intervals for a register def
/// (calls handlePhysicalRegisterDef and
/// handleVirtualRegisterDef)
- void handleRegisterDef(MachineBasicBlock* mbb,
- MachineBasicBlock::iterator mi,
+ void handleRegisterDef(MachineBasicBlock *MBB,
+ MachineBasicBlock::iterator MI, unsigned MIIdx,
unsigned reg);
/// handleVirtualRegisterDef - update intervals for a virtual
/// register def
- void handleVirtualRegisterDef(MachineBasicBlock* mbb,
- MachineBasicBlock::iterator mi,
+ void handleVirtualRegisterDef(MachineBasicBlock *MBB,
+ MachineBasicBlock::iterator MI,
+ unsigned MIIdx,
LiveInterval& interval);
/// handlePhysicalRegisterDef - update intervals for a physical register
/// def.
void handlePhysicalRegisterDef(MachineBasicBlock* mbb,
MachineBasicBlock::iterator mi,
+ unsigned MIIdx,
LiveInterval &interval,
unsigned SrcReg);
+ /// handleLiveInRegister - Create interval for a livein register.
+ void handleLiveInRegister(MachineBasicBlock* mbb,
+ unsigned MIIdx,
+ LiveInterval &interval);
+
/// Return true if the two specified registers belong to different
/// register classes. The registers may be either phys or virt regs.
bool differingRegisterClasses(unsigned RegA, unsigned RegB) const;
bool AdjustCopiesBackFrom(LiveInterval &IntA, LiveInterval &IntB,
MachineInstr *CopyMI);
- bool overlapsAliases(const LiveInterval *lhs,
- const LiveInterval *rhs) const;
+ /// lastRegisterUse - Returns the last use of the specific register between
+ /// cycles Start and End. It also returns the use operand by reference. It
+ /// returns NULL if there are no uses.
+ MachineInstr *lastRegisterUse(unsigned Reg, unsigned Start, unsigned End,
+ MachineOperand *&MOU);
+
+ /// findDefOperand - Returns the MachineOperand that is a def of the specific
+ /// register. It returns NULL if the def is not found.
+ MachineOperand *findDefOperand(MachineInstr *MI, unsigned Reg);
+
+ /// unsetRegisterKill - Unset IsKill property of all uses of the specific
+ /// register of the specific instruction.
+ void unsetRegisterKill(MachineInstr *MI, unsigned Reg);
+
+ /// hasRegisterDef - True if the instruction defines the specific register.
+ ///
+ bool hasRegisterDef(MachineInstr *MI, unsigned Reg);
static LiveInterval createInterval(unsigned Reg);
+ void removeInterval(unsigned Reg) {
+ r2iMap_.erase(Reg);
+ }
+
LiveInterval &getOrCreateInterval(unsigned reg) {
Reg2IntervalMap::iterator I = r2iMap_.find(reg);
if (I == r2iMap_.end())
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