Commit cd2a73a9 authored by Kai Luo's avatar Kai Luo
Browse files

[MCP] Add stats for backward copy propagation. NFC.

parent 36ae2556

llvm/lib/CodeGen/MachineCopyPropagation.cpp

+5 −1
Original line number Diff line number Diff line
@@ -78,6 +78,7 @@ using namespace llvm; 


STATISTIC(NumDeletes, "Number of dead copies deleted");

STATISTIC(NumCopyForwards, "Number of copy uses forwarded");

STATISTIC(NumCopyBackwardPropagated, "Number of copy defs backward propagated");

DEBUG_COUNTER(FwdCounter, "machine-cp-fwd",

              "Controls which register COPYs are forwarded");
@@ -793,6 +794,7 @@ void MachineCopyPropagation::propagateDefs(MachineInstr &MI) { 
    LLVM_DEBUG(dbgs() << "MCP: After replacement: " << MI << "\n");

    MaybeDeadCopies.insert(Copy);

    Changed = true;

    ++NumCopyBackwardPropagated;

  }

}
@@ -849,8 +851,10 @@ void MachineCopyPropagation::BackwardCopyPropagateBlock( 
    }

  }



  for (auto *Copy : MaybeDeadCopies)

  for (auto *Copy : MaybeDeadCopies) {

    Copy->eraseFromParent();

    ++NumDeletes;

  }



  MaybeDeadCopies.clear();

  CopyDbgUsers.clear();