diff options
Diffstat (limited to 'lib/CodeGen/TwoAddressInstructionPass.cpp')
| -rw-r--r-- | lib/CodeGen/TwoAddressInstructionPass.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp index 3e9a0e44e9..7a0fcb5651 100644 --- a/lib/CodeGen/TwoAddressInstructionPass.cpp +++ b/lib/CodeGen/TwoAddressInstructionPass.cpp @@ -933,6 +933,7 @@ TwoAddressInstructionPass::RescheduleMIBelowKill(MachineBasicBlock *MBB, return false; SmallSet<unsigned, 2> Uses; + SmallSet<unsigned, 2> Kills; SmallSet<unsigned, 2> Defs; for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { const MachineOperand &MO = MI->getOperand(i); @@ -943,8 +944,11 @@ TwoAddressInstructionPass::RescheduleMIBelowKill(MachineBasicBlock *MBB, continue; if (MO.isDef()) Defs.insert(MOReg); - else + else { Uses.insert(MOReg); + if (MO.isKill() && MOReg != Reg) + Kills.insert(MOReg); + } } // Move the copies connected to MI down as well. @@ -991,7 +995,8 @@ TwoAddressInstructionPass::RescheduleMIBelowKill(MachineBasicBlock *MBB, } else { if (Defs.count(MOReg)) return false; - if (MOReg != Reg && MO.isKill() && Uses.count(MOReg)) + if (MOReg != Reg && + ((MO.isKill() && Uses.count(MOReg)) || Kills.count(MOReg))) // Don't want to extend other live ranges and update kills. return false; } |