diff options
Diffstat (limited to 'include/llvm/CodeGen/LiveVariables.h')
| -rw-r--r-- | include/llvm/CodeGen/LiveVariables.h | 41 |
1 files changed, 24 insertions, 17 deletions
diff --git a/include/llvm/CodeGen/LiveVariables.h b/include/llvm/CodeGen/LiveVariables.h index 8938330fad..b9d5784d32 100644 --- a/include/llvm/CodeGen/LiveVariables.h +++ b/include/llvm/CodeGen/LiveVariables.h @@ -154,20 +154,6 @@ private: // Intermediate data structures SmallVector<unsigned, 4> *PHIVarInfo; - /// addRegisterKilled - We have determined MI kills a register. Look for the - /// operand that uses it and mark it as IsKill. If AddIfNotFound is true, - /// add a implicit operand if it's not found. Returns true if the operand - /// exists / is added. - bool addRegisterKilled(unsigned IncomingReg, MachineInstr *MI, - bool AddIfNotFound = false); - - /// addRegisterDead - We have determined MI defined a register without a use. - /// Look for the operand that defines it and mark it as IsDead. If - /// AddIfNotFound is true, add a implicit operand if it's not found. Returns - /// true if the operand exists / is added. - bool addRegisterDead(unsigned IncomingReg, MachineInstr *MI, - bool AddIfNotFound = false); - void addRegisterKills(unsigned Reg, MachineInstr *MI, SmallSet<unsigned, 4> &SubKills); @@ -210,15 +196,28 @@ public: /// the records for NewMI. void instructionChanged(MachineInstr *OldMI, MachineInstr *NewMI); + /// transferKillDeadInfo - Similar to instructionChanged except it does not + /// update live variables internal data structures. + static void transferKillDeadInfo(MachineInstr *OldMI, MachineInstr *NewMI, + const MRegisterInfo *RegInfo); + + /// addRegisterKilled - We have determined MI kills a register. Look for the + /// operand that uses it and mark it as IsKill. If AddIfNotFound is true, + /// add a implicit operand if it's not found. Returns true if the operand + /// exists / is added. + static bool addRegisterKilled(unsigned IncomingReg, MachineInstr *MI, + const MRegisterInfo *RegInfo, + bool AddIfNotFound = false); + /// addVirtualRegisterKilled - Add information about the fact that the /// specified register is killed after being used by the specified /// instruction. If AddIfNotFound is true, add a implicit operand if it's /// not found. void addVirtualRegisterKilled(unsigned IncomingReg, MachineInstr *MI, bool AddIfNotFound = false) { - if (addRegisterKilled(IncomingReg, MI, AddIfNotFound)) + if (addRegisterKilled(IncomingReg, MI, RegInfo, AddIfNotFound)) getVarInfo(IncomingReg).Kills.push_back(MI); - } + } /// removeVirtualRegisterKilled - Remove the specified virtual /// register from the live variable information. Returns true if the @@ -248,12 +247,20 @@ public: /// instruction. void removeVirtualRegistersKilled(MachineInstr *MI); + /// addRegisterDead - We have determined MI defined a register without a use. + /// Look for the operand that defines it and mark it as IsDead. If + /// AddIfNotFound is true, add a implicit operand if it's not found. Returns + /// true if the operand exists / is added. + static bool addRegisterDead(unsigned IncomingReg, MachineInstr *MI, + const MRegisterInfo *RegInfo, + bool AddIfNotFound = false); + /// addVirtualRegisterDead - Add information about the fact that the specified /// register is dead after being used by the specified instruction. If /// AddIfNotFound is true, add a implicit operand if it's not found. void addVirtualRegisterDead(unsigned IncomingReg, MachineInstr *MI, bool AddIfNotFound = false) { - if (addRegisterDead(IncomingReg, MI, AddIfNotFound)) + if (addRegisterDead(IncomingReg, MI, RegInfo, AddIfNotFound)) getVarInfo(IncomingReg).Kills.push_back(MI); } |