#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/Statistic.h"
+#include "llvm/CodeGen/MachineBranchProbabilityInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
class TailDuplicatePass : public MachineFunctionPass {
const TargetInstrInfo *TII;
const TargetRegisterInfo *TRI;
+ const MachineBranchProbabilityInfo *MBPI;
MachineModuleInfo *MMI;
MachineRegisterInfo *MRI;
OwningPtr<RegScavenger> RS;
virtual bool runOnMachineFunction(MachineFunction &MF);
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const;
+
private:
void AddSSAUpdateEntry(unsigned OrigReg, unsigned NewReg,
MachineBasicBlock *BB);
TRI = MF.getTarget().getRegisterInfo();
MRI = &MF.getRegInfo();
MMI = getAnalysisIfAvailable<MachineModuleInfo>();
+ MBPI = &getAnalysis<MachineBranchProbabilityInfo>();
+
PreRegAlloc = MRI->isSSA();
RS.reset();
if (MRI->tracksLiveness() && TRI->trackLivenessAfterRegAlloc(MF))
return MadeChange;
}
+void TailDuplicatePass::getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequired<MachineBranchProbabilityInfo>();
+ MachineFunctionPass::getAnalysisUsage(AU);
+}
+
static void VerifyPHIs(MachineFunction &MF, bool CheckExtra) {
for (MachineFunction::iterator I = ++MF.begin(), E = MF.end(); I != E; ++I) {
MachineBasicBlock *MBB = I;
if (PredTBB)
TII->InsertBranch(*PredBB, PredTBB, PredFBB, PredCond, DebugLoc());
+ uint32_t Weight = MBPI->getEdgeWeight(PredBB, TailBB);
PredBB->removeSuccessor(TailBB);
unsigned NumSuccessors = PredBB->succ_size();
assert(NumSuccessors <= 1);
if (NumSuccessors == 0 || *PredBB->succ_begin() != NewTarget)
- PredBB->addSuccessor(NewTarget);
+ PredBB->addSuccessor(NewTarget, Weight);
TDBBs.push_back(PredBB);
}
"TailDuplicate called on block with multiple successors!");
for (MachineBasicBlock::succ_iterator I = TailBB->succ_begin(),
E = TailBB->succ_end(); I != E; ++I)
- PredBB->addSuccessor(*I);
+ PredBB->addSuccessor(*I, MBPI->getEdgeWeight(TailBB, I));
Changed = true;
++NumTailDups;