diff options
Diffstat (limited to 'contrib/llvm/lib/CodeGen/LiveRangeEdit.cpp')
| -rw-r--r-- | contrib/llvm/lib/CodeGen/LiveRangeEdit.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/contrib/llvm/lib/CodeGen/LiveRangeEdit.cpp b/contrib/llvm/lib/CodeGen/LiveRangeEdit.cpp index f8a3dbb..052abad 100644 --- a/contrib/llvm/lib/CodeGen/LiveRangeEdit.cpp +++ b/contrib/llvm/lib/CodeGen/LiveRangeEdit.cpp @@ -15,6 +15,7 @@ #include "LiveRangeEdit.h" #include "VirtRegMap.h" #include "llvm/ADT/SetVector.h" +#include "llvm/ADT/Statistic.h" #include "llvm/CodeGen/CalcSpillWeights.h" #include "llvm/CodeGen/LiveIntervalAnalysis.h" #include "llvm/CodeGen/MachineRegisterInfo.h" @@ -24,6 +25,10 @@ using namespace llvm; +STATISTIC(NumDCEDeleted, "Number of instructions deleted by DCE"); +STATISTIC(NumDCEFoldedLoads, "Number of single use loads folded after DCE"); +STATISTIC(NumFracRanges, "Number of live ranges fractured by DCE"); + LiveInterval &LiveRangeEdit::createFrom(unsigned OldReg, LiveIntervals &LIS, VirtRegMap &VRM) { @@ -199,6 +204,7 @@ bool LiveRangeEdit::foldAsLoad(LiveInterval *LI, UseMI->eraseFromParent(); DefMI->addRegisterDead(LI->reg, 0); Dead.push_back(DefMI); + ++NumDCEFoldedLoads; return true; } @@ -269,6 +275,7 @@ void LiveRangeEdit::eliminateDeadDefs(SmallVectorImpl<MachineInstr*> &Dead, delegate_->LRE_WillEraseInstruction(MI); LIS.RemoveMachineInstrFromMaps(MI); MI->eraseFromParent(); + ++NumDCEDeleted; } if (ToShrink.empty()) @@ -290,6 +297,7 @@ void LiveRangeEdit::eliminateDeadDefs(SmallVectorImpl<MachineInstr*> &Dead, unsigned NumComp = ConEQ.Classify(LI); if (NumComp <= 1) continue; + ++NumFracRanges; DEBUG(dbgs() << NumComp << " components: " << *LI << '\n'); SmallVector<LiveInterval*, 8> Dups(1, LI); for (unsigned i = 1; i != NumComp; ++i) { |
