#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetSubtargetInfo.h"
using namespace llvm;
if (MI->isInlineAsm())
return false;
+ // Don't delete frame allocation labels.
+ if (MI->getOpcode() == TargetOpcode::FRAME_ALLOC)
+ return false;
+
// Don't delete instructions with side effects.
bool SawStore = false;
if (!MI->isSafeToMove(TII, nullptr, SawStore) && !MI->isPHI())
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,