mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 00:11:00 +00:00
36f7707d2a
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@917 91177308-0d34-0410-b5e6-96231b3b80d8
147 lines
3.5 KiB
C++
147 lines
3.5 KiB
C++
/* Title: LiveRange.h
|
|
Author: Ruchira Sasanka
|
|
Date: July 25, 01
|
|
Purpose: To keep info about a live range.
|
|
Asuumptions:
|
|
|
|
Since the Value pointed by a use is the same as of its def, it is sufficient
|
|
to keep only defs in a LiveRange.
|
|
*/
|
|
|
|
#ifndef LIVE_RANGE_H
|
|
#define LIVE_RANGE_H
|
|
|
|
#include "llvm/Analysis/LiveVar/ValueSet.h"
|
|
#include "llvm/Type.h"
|
|
|
|
|
|
|
|
|
|
class RegClass;
|
|
class IGNode;
|
|
|
|
|
|
class LiveRange : public ValueSet
|
|
{
|
|
private:
|
|
|
|
RegClass *MyRegClass; // register classs (e.g., int, FP) for this LR
|
|
|
|
// a list of call instructions that interferes with this live range
|
|
//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
|
|
int Color; // color assigned to this live range
|
|
bool mustSpill; // whether this LR must be spilt
|
|
|
|
// whether this LR must be saved accross calls ***TODO REMOVE this
|
|
bool mustSaveAcrossCalls;
|
|
|
|
// bool mustLoadFromStack; // must load from stack at start of method
|
|
|
|
|
|
int SuggestedColor; // The suggested color for this LR
|
|
|
|
public:
|
|
|
|
|
|
~LiveRange() {} // empty destructor
|
|
|
|
void setRegClass(RegClass *const RC)
|
|
{ MyRegClass = RC; }
|
|
|
|
inline RegClass *const getRegClass() const
|
|
{ assert(MyRegClass); return MyRegClass; }
|
|
|
|
inline bool hasColor() const
|
|
{ return Color != -1; }
|
|
|
|
inline unsigned int getColor() const
|
|
{ assert( Color != -1); return (unsigned) Color ; }
|
|
|
|
inline void setColor(unsigned int Col)
|
|
{ Color = (int) Col ; }
|
|
|
|
|
|
inline void setCallInterference()
|
|
{ doesSpanAcrossCalls = 1;
|
|
//CallInterferenceList.push_back( Inst );
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
inline const Instruction *const getCallInterference(const unsigned i) const {
|
|
assert( i < CallInterferenceList.size() );
|
|
return CallInterferenceList[i];
|
|
}
|
|
*/
|
|
|
|
inline bool isCallInterference() const
|
|
{ return (doesSpanAcrossCalls == 1); }
|
|
|
|
|
|
inline void markForSpill() { mustSpill = true; }
|
|
|
|
inline void markForSaveAcrossCalls() { mustSaveAcrossCalls = true; }
|
|
|
|
// inline void markForLoadFromStack() { mustLoadFromStack = true;
|
|
|
|
|
|
inline void setUserIGNode( IGNode *const IGN)
|
|
{ assert( !UserIGNode); UserIGNode = IGN; }
|
|
|
|
inline IGNode * getUserIGNode() const
|
|
{ return UserIGNode; } // NULL if the user is not allocated
|
|
|
|
inline Type::PrimitiveID getTypeID() const {
|
|
const Value *val = *begin();
|
|
assert(val && "Can't find type - Live range is empty" );
|
|
return (val->getType())->getPrimitiveID();
|
|
}
|
|
|
|
|
|
inline void setSuggestedColor(int Col) {
|
|
//assert( (SuggestedColor == -1) && "Changing an already suggested color");
|
|
|
|
if(SuggestedColor == -1 )
|
|
SuggestedColor = Col;
|
|
else if (DEBUG_RA)
|
|
cerr << "Already has a suggested color " << Col << endl;
|
|
}
|
|
|
|
inline unsigned getSuggestedColor() const {
|
|
assert( SuggestedColor != -1); // only a valid color is obtained
|
|
return (unsigned) SuggestedColor;
|
|
}
|
|
|
|
inline bool hasSuggestedColor() const {
|
|
return ( SuggestedColor > -1);
|
|
}
|
|
|
|
inline LiveRange() : ValueSet() /* , CallInterferenceList() */
|
|
{
|
|
Color = SuggestedColor = -1; // not yet colored
|
|
mustSpill = mustSaveAcrossCalls = false;
|
|
MyRegClass = NULL;
|
|
UserIGNode = NULL;
|
|
doesSpanAcrossCalls = false;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|