| Ruchira Sasanka | c7136d2 | 2001-09-08 14:10:34 +0000 | [diff] [blame] | 1 | /* Title: LiveRange.h |
| 2 | Author: Ruchira Sasanka |
| 3 | Date: July 25, 01 |
| 4 | Purpose: To keep info about a live range. |
| 5 | Asuumptions: |
| 6 | |
| 7 | Since the Value pointed by a use is the same as of its def, it is sufficient |
| 8 | to keep only defs in a LiveRange. |
| 9 | */ |
| 10 | |
| 11 | #ifndef LIVE_RANGE_H |
| 12 | #define LIVE_RANGE_H |
| 13 | |
| 14 | #include "llvm/Analysis/LiveVar/ValueSet.h" |
| 15 | #include "llvm/Type.h" |
| 16 | |
| 17 | |
| 18 | |
| 19 | |
| 20 | class RegClass; |
| 21 | class IGNode; |
| 22 | |
| 23 | |
| 24 | class LiveRange : public ValueSet |
| 25 | { |
| 26 | private: |
| 27 | |
| 28 | RegClass *MyRegClass; // register classs (e.g., int, FP) for this LR |
| 29 | |
| 30 | // a list of call instructions that interferes with this live range |
| 31 | vector<const Instruction *> CallInterferenceList; |
| 32 | |
| 33 | IGNode *UserIGNode; // IGNode which uses this LR |
| 34 | int Color; // color assigned to this live range |
| 35 | bool mustSpill; // whether this LR must be spilt |
| 36 | |
| 37 | // whether this LR must be saved accross calls |
| 38 | bool mustSaveAcrossCalls; |
| 39 | |
| 40 | // bool mustLoadFromStack; // must load from stack at start of method |
| 41 | |
| 42 | public: |
| 43 | |
| 44 | |
| 45 | ~LiveRange() {} // empty destructor |
| 46 | |
| 47 | void setRegClass(RegClass *const RC) |
| 48 | { MyRegClass = RC; } |
| 49 | |
| 50 | inline RegClass *const getRegClass() const |
| 51 | { assert(MyRegClass); return MyRegClass; } |
| 52 | |
| 53 | inline bool hasColor() const |
| 54 | { return Color != -1; } |
| 55 | |
| 56 | inline unsigned int getColor() const |
| 57 | { assert( Color != -1); return (unsigned) Color ; } |
| 58 | |
| 59 | inline void setColor(unsigned int Col) |
| 60 | { Color = (int) Col ; } |
| 61 | |
| 62 | |
| 63 | inline void addCallInterference(const Instruction *const Inst) |
| 64 | { CallInterferenceList.push_back( Inst ); } |
| 65 | |
| 66 | inline const Instruction *const getCallInterference(const unsigned i) const { |
| 67 | assert( i < CallInterferenceList.size() ); |
| 68 | return CallInterferenceList[i]; |
| 69 | } |
| 70 | |
| 71 | inline unsigned int getNumOfCallInterferences() const |
| 72 | { return CallInterferenceList.size(); } |
| 73 | |
| 74 | |
| 75 | inline void markForSpill() { mustSpill = true; } |
| 76 | |
| 77 | inline void markForSaveAcrossCalls() { mustSaveAcrossCalls = true; } |
| 78 | |
| 79 | // inline void markForLoadFromStack() { mustLoadFromStack = true; |
| 80 | |
| 81 | |
| 82 | inline void setUserIGNode( IGNode *const IGN) |
| 83 | { assert( !UserIGNode); UserIGNode = IGN; } |
| 84 | |
| 85 | inline IGNode * getUserIGNode() const |
| 86 | { return UserIGNode; } // NULL if the user is not allocated |
| 87 | |
| 88 | inline Type::PrimitiveID getTypeID() const { |
| 89 | const Value *val = *begin(); |
| 90 | assert(val && "Can't find type - Live range is empty" ); |
| 91 | return (val->getType())->getPrimitiveID(); |
| 92 | } |
| 93 | |
| 94 | |
| 95 | inline LiveRange() : ValueSet() , CallInterferenceList() |
| 96 | { |
| 97 | Color = -1; // not yet colored |
| 98 | mustSpill = mustSaveAcrossCalls = false; |
| 99 | MyRegClass = NULL; |
| 100 | UserIGNode = NULL; |
| 101 | } |
| 102 | |
| 103 | }; |
| 104 | |
| 105 | |
| 106 | |
| 107 | |
| 108 | |
| 109 | #endif |
| 110 | |