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Changed Call interference info 

llvm-svn: 917
This commit is contained in:
Ruchira Sasanka 2001-10-19 17:21:59 +00:00
parent 09d7a2a496
commit 6275a04aac
3 changed files with 27 additions and 10 deletions
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4
llvm/lib/CodeGen/RegAlloc/IGNode.h
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@ -122,8 +122,8 @@ class IGNode
// { ParentLR->markForLoadFromStack(); } // { ParentLR->markForLoadFromStack(); }
inline unsigned int getNumOfCallInterferences() const inline unsigned int isCallInterference() const
{ return ParentLR->getNumOfCallInterferences(); } { return ParentLR->isCallInterference(); }
inline LiveRange *getParentLR() const inline LiveRange *getParentLR() const
{ return ParentLR; } { return ParentLR; }

31
llvm/lib/CodeGen/RegAlloc/LiveRange.h
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@ -28,13 +28,20 @@ class LiveRange : public ValueSet
RegClass *MyRegClass; // register classs (e.g., int, FP) for this LR RegClass *MyRegClass; // register classs (e.g., int, FP) for this LR
// a list of call instructions that interferes with this live range // a list of call instructions that interferes with this live range
vector<const Instruction *> CallInterferenceList; //vector<const Instruction *> CallInterferenceList;
// does this live range span across calls?
// This information is used by graph
// coloring algo to avoid allocating volatile colors to live ranges
// that span across calls (since they have to be saved/restored)
bool doesSpanAcrossCalls;
IGNode *UserIGNode; // IGNode which uses this LR IGNode *UserIGNode; // IGNode which uses this LR
int Color; // color assigned to this live range int Color; // color assigned to this live range
bool mustSpill; // whether this LR must be spilt bool mustSpill; // whether this LR must be spilt
// whether this LR must be saved accross calls // whether this LR must be saved accross calls ***TODO REMOVE this
bool mustSaveAcrossCalls; bool mustSaveAcrossCalls;
// bool mustLoadFromStack; // must load from stack at start of method // bool mustLoadFromStack; // must load from stack at start of method
@ -55,7 +62,7 @@ class LiveRange : public ValueSet
inline bool hasColor() const inline bool hasColor() const
{ return Color != -1; } { return Color != -1; }
inline unsigned int getColor() const inline unsigned int getColor() const
{ assert( Color != -1); return (unsigned) Color ; } { assert( Color != -1); return (unsigned) Color ; }
@ -63,16 +70,22 @@ class LiveRange : public ValueSet
{ Color = (int) Col ; } { Color = (int) Col ; }
inline void addCallInterference(const Instruction *const Inst) inline void setCallInterference()
{ CallInterferenceList.push_back( Inst ); } { doesSpanAcrossCalls = 1;
//CallInterferenceList.push_back( Inst );
}
/*
inline const Instruction *const getCallInterference(const unsigned i) const { inline const Instruction *const getCallInterference(const unsigned i) const {
assert( i < CallInterferenceList.size() ); assert( i < CallInterferenceList.size() );
return CallInterferenceList[i]; return CallInterferenceList[i];
} }
*/
inline unsigned int getNumOfCallInterferences() const inline bool isCallInterference() const
{ return CallInterferenceList.size(); } { return (doesSpanAcrossCalls == 1); }
inline void markForSpill() { mustSpill = true; } inline void markForSpill() { mustSpill = true; }
@ -113,12 +126,14 @@ class LiveRange : public ValueSet
return ( SuggestedColor > -1); return ( SuggestedColor > -1);
} }
inline LiveRange() : ValueSet() , CallInterferenceList() inline LiveRange() : ValueSet() /* , CallInterferenceList() */
{ {
Color = SuggestedColor = -1; // not yet colored Color = SuggestedColor = -1; // not yet colored
mustSpill = mustSaveAcrossCalls = false; mustSpill = mustSaveAcrossCalls = false;
MyRegClass = NULL; MyRegClass = NULL;
UserIGNode = NULL; UserIGNode = NULL;
doesSpanAcrossCalls = false;
} }
}; };

2
llvm/lib/CodeGen/RegAlloc/PhyRegAlloc.h
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@ -84,6 +84,8 @@ class PhyRegAlloc
void insertCallerSavingCode(const MachineInstr *MInst, void insertCallerSavingCode(const MachineInstr *MInst,
const BasicBlock *BB ); const BasicBlock *BB );
void setCallInterferences(const MachineInstr *MInst,
const LiveVarSet *const LVSetAft );
inline void constructLiveRanges() inline void constructLiveRanges()
{ LRI.constructLiveRanges(); } { LRI.constructLiveRanges(); }