Added comments, destructors where necessary.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1491 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAlloc/PhyRegAlloc.h b/lib/CodeGen/RegAlloc/PhyRegAlloc.h
index f76e68b..9d34557 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, &MRI, &LVI); // allocate regs
- PRA.allocateRegisters();
- Assumptions:
- All values in a live range will be of the same physical reg class.
+ PhyRegAlloc PRA(*MethodI, target, &LVI); // allocate regs
+ PRA.allocateRegisters();
+
+
*/
@@ -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 @@
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 @@
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 @@
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();
};