diff options
Diffstat (limited to 'include/llvm/CodeGen/LiveVariables.h')
| -rw-r--r-- | include/llvm/CodeGen/LiveVariables.h | 36 |
1 files changed, 22 insertions, 14 deletions
diff --git a/include/llvm/CodeGen/LiveVariables.h b/include/llvm/CodeGen/LiveVariables.h index 5b42a71318..ebbe610ed0 100644 --- a/include/llvm/CodeGen/LiveVariables.h +++ b/include/llvm/CodeGen/LiveVariables.h @@ -147,12 +147,18 @@ 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. - void addRegisterKilled(unsigned IncomingReg, MachineInstr *MI); + /// 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. - void addRegisterDead(unsigned IncomingReg, MachineInstr *MI); + /// 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 HandlePhysRegUse(unsigned Reg, MachineInstr *MI); void HandlePhysRegDef(unsigned Reg, MachineInstr *MI); @@ -189,11 +195,12 @@ public: /// addVirtualRegisterKilled - Add information about the fact that the /// specified register is killed after being used by the specified - /// instruction. - /// - void addVirtualRegisterKilled(unsigned IncomingReg, MachineInstr *MI) { - addRegisterKilled(IncomingReg, MI); - getVarInfo(IncomingReg).Kills.push_back(MI); + /// 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)) + getVarInfo(IncomingReg).Kills.push_back(MI); } /// removeVirtualRegisterKilled - Remove the specified virtual @@ -225,11 +232,12 @@ public: void removeVirtualRegistersKilled(MachineInstr *MI); /// addVirtualRegisterDead - Add information about the fact that the specified - /// register is dead after being used by the specified instruction. - /// - void addVirtualRegisterDead(unsigned IncomingReg, MachineInstr *MI) { - addRegisterDead(IncomingReg, MI); - getVarInfo(IncomingReg).Kills.push_back(MI); + /// 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)) + getVarInfo(IncomingReg).Kills.push_back(MI); } /// removeVirtualRegisterDead - Remove the specified virtual |