diff options
Diffstat (limited to 'llvm/lib/CodeGen/DeadMachineInstructionElim.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/DeadMachineInstructionElim.cpp | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/llvm/lib/CodeGen/DeadMachineInstructionElim.cpp b/llvm/lib/CodeGen/DeadMachineInstructionElim.cpp index 535477de788..f3be2abacd7 100644 --- a/llvm/lib/CodeGen/DeadMachineInstructionElim.cpp +++ b/llvm/lib/CodeGen/DeadMachineInstructionElim.cpp @@ -124,19 +124,10 @@ bool DeadMachineInstructionElim::runOnMachineFunction(MachineFunction &MF) { if (isDead(MI)) { DEBUG(dbgs() << "DeadMachineInstructionElim: DELETING: " << *MI); // It is possible that some DBG_VALUE instructions refer to this - // instruction. Examine each def operand for such references; - // if found, mark the DBG_VALUE as undef (but don't delete it). - for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { - const MachineOperand &MO = MI->getOperand(i); - if (!MO.isReg() || !MO.isDef()) - continue; - unsigned Reg = MO.getReg(); - if (!TargetRegisterInfo::isVirtualRegister(Reg)) - continue; - MRI->markUsesInDebugValueAsUndef(Reg); - } + // instruction. They get marked as undef and will be deleted + // in the live debug variable analysis. + MI->eraseFromParentAndMarkDBGValuesForRemoval(); AnyChanges = true; - MI->eraseFromParent(); ++NumDeletes; MIE = MBB->rend(); // MII is now pointing to the next instruction to process, |
