diff options
| -rw-r--r-- | lib/CodeGen/PostRASchedulerList.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/CodeGen/PostRASchedulerList.cpp b/lib/CodeGen/PostRASchedulerList.cpp index b8747b9..1afc1ec 100644 --- a/lib/CodeGen/PostRASchedulerList.cpp +++ b/lib/CodeGen/PostRASchedulerList.cpp @@ -515,11 +515,11 @@ void SchedulePostRATDList::FixupKills(MachineBasicBlock *MBB) { // Examine all used registers and set/clear kill flag. When a // register is used multiple times we only set the kill flag on - // the first use. + // the first use. Don't set kill flags on undef operands. killedRegs.reset(); for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { MachineOperand &MO = MI->getOperand(i); - if (!MO.isReg() || !MO.isUse()) continue; + if (!MO.isReg() || !MO.isUse() || MO.isUndef()) continue; unsigned Reg = MO.getReg(); if ((Reg == 0) || MRI.isReserved(Reg)) continue; |