diff options
Diffstat (limited to 'lib/CodeGen/LiveVariables.cpp')
| -rw-r--r-- | lib/CodeGen/LiveVariables.cpp | 31 |
1 files changed, 12 insertions, 19 deletions
diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp index a622b05160..1bfc6e553d 100644 --- a/lib/CodeGen/LiveVariables.cpp +++ b/lib/CodeGen/LiveVariables.cpp @@ -117,14 +117,6 @@ void LiveVariables::HandlePhysRegUse(unsigned Reg, MachineInstr *MI) { if (PhysRegInfo[Reg]) { PhysRegInfo[Reg] = MI; PhysRegUsed[Reg] = true; - } else { - for (const unsigned *AliasSet = RegInfo->getAliasSet(Reg); - *AliasSet; ++AliasSet) { - if (MachineInstr *LastUse = PhysRegInfo[*AliasSet]) { - PhysRegInfo[*AliasSet] = MI; - PhysRegUsed[*AliasSet] = true; - } - } } } @@ -135,20 +127,21 @@ void LiveVariables::HandlePhysRegDef(unsigned Reg, MachineInstr *MI) { RegistersKilled.insert(std::make_pair(LastUse, Reg)); else RegistersDead.insert(std::make_pair(LastUse, Reg)); - } else { - for (const unsigned *AliasSet = RegInfo->getAliasSet(Reg); - *AliasSet; ++AliasSet) { - if (MachineInstr *LastUse = PhysRegInfo[*AliasSet]) { - if (PhysRegUsed[*AliasSet]) - RegistersKilled.insert(std::make_pair(LastUse, *AliasSet)); - else - RegistersDead.insert(std::make_pair(LastUse, *AliasSet)); - PhysRegInfo[*AliasSet] = 0; // Kill the aliased register - } - } } PhysRegInfo[Reg] = MI; PhysRegUsed[Reg] = false; + + for (const unsigned *AliasSet = RegInfo->getAliasSet(Reg); + *AliasSet; ++AliasSet) { + if (MachineInstr *LastUse = PhysRegInfo[*AliasSet]) { + if (PhysRegUsed[*AliasSet]) + RegistersKilled.insert(std::make_pair(LastUse, *AliasSet)); + else + RegistersDead.insert(std::make_pair(LastUse, *AliasSet)); + } + PhysRegInfo[*AliasSet] = MI; + PhysRegUsed[*AliasSet] = false; + } } bool LiveVariables::runOnMachineFunction(MachineFunction &MF) { |