diff options
Diffstat (limited to 'lib/CodeGen/RegAlloc/PhyRegAlloc.h')
| -rw-r--r-- | lib/CodeGen/RegAlloc/PhyRegAlloc.h | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/lib/CodeGen/RegAlloc/PhyRegAlloc.h b/lib/CodeGen/RegAlloc/PhyRegAlloc.h index f76e68bb96..9d34557b01 100644 --- a/lib/CodeGen/RegAlloc/PhyRegAlloc.h +++ b/lib/CodeGen/RegAlloc/PhyRegAlloc.h @@ -4,6 +4,7 @@ Purpose: This is the main entry point for register allocation. Notes: + ===== * RegisterClasses: Each RegClass accepts a MachineRegClass which contains machine specific info about that register @@ -14,18 +15,18 @@ * Machine dependent work: All parts of the register coloring algorithm except coloring of an individual node are machine independent. - Register allocation must be done as: + Register allocation must be done as: - static const MachineRegInfo MRI = MachineRegInfo(); // machine reg info + MethodLiveVarInfo LVI(*MethodI ); // compute LV info + LVI.analyze(); - MethodLiveVarInfo LVI(*MethodI ); // compute LV info - LVI.analyze(); + TargetMachine &target = .... + + + PhyRegAlloc PRA(*MethodI, target, &LVI); // allocate regs + PRA.allocateRegisters(); - PhyRegAlloc PRA(*MethodI, &MRI, &LVI); // allocate regs - PRA.allocateRegisters(); - Assumptions: - All values in a live range will be of the same physical reg class. */ @@ -36,6 +37,7 @@ #include "llvm/CodeGen/RegClass.h" #include "llvm/CodeGen/LiveRangeInfo.h" #include "llvm/Analysis/LiveVar/MethodLiveVarInfo.h" +#include "llvm/Analysis/LoopDepth.h" #include <deque> @@ -82,15 +84,15 @@ class PhyRegAlloc: public NonCopyable const MachineRegInfo &MRI; // Machine Register information const unsigned NumOfRegClasses; // recorded here for efficiency - //vector<const Instruction *> CallInstrList; // a list of all call instrs - //vector<const Instruction *> RetInstrList; // a list of all return instrs - AddedInstrMapType AddedInstrMap; // to store instrns added in this phase + LoopDepthCalculator LoopDepthCalc; // to calculate loop depths + ReservedColorListType ResColList; // A set of reserved regs if desired. + // currently not used - //vector<const MachineInstr *> PhiInstList; // a list of all phi instrs - //------- private methods --------------------------------------------------- + + //------- ------------------ private methods--------------------------------- void addInterference(const Value *const Def, const LiveVarSet *const LVSet, const bool isCallInst); @@ -98,8 +100,6 @@ class PhyRegAlloc: public NonCopyable void addInterferencesForArgs(); void createIGNodeListsAndIGs(); void buildInterferenceGraphs(); - //void insertCallerSavingCode(const MachineInstr *MInst, - // const BasicBlock *BB ); void setCallInterferences(const MachineInstr *MInst, const LiveVarSet *const LVSetAft ); @@ -147,7 +147,11 @@ class PhyRegAlloc: public NonCopyable PhyRegAlloc(Method *const M, const TargetMachine& TM, MethodLiveVarInfo *const Lvi); - void allocateRegisters(); // main method called for allocatin + ~PhyRegAlloc(); + + // main method called for allocating registers + // + void allocateRegisters(); }; |