C++ (Cpp) FixedBlockInfo Examples

Example #1

File: MachineTraceMetrics.cpp Project: compnerd/llvm

/// Compute the resource usage in basic block MBB.
const MachineTraceMetrics::FixedBlockInfo*
MachineTraceMetrics::getResources(const MachineBasicBlock *MBB) {
  assert(MBB && "No basic block");
  FixedBlockInfo *FBI = &BlockInfo[MBB->getNumber()];
  if (FBI->hasResources())
    return FBI;

  // Compute resource usage in the block.
  FBI->HasCalls = false;
  unsigned InstrCount = 0;

  // Add up per-processor resource cycles as well.
  unsigned PRKinds = SchedModel.getNumProcResourceKinds();
  SmallVector<unsigned, 32> PRCycles(PRKinds);

  for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
       I != E; ++I) {
    const MachineInstr *MI = I;
    if (MI->isTransient())
      continue;
    ++InstrCount;
    if (MI->isCall())
      FBI->HasCalls = true;

    // Count processor resources used.
    if (!SchedModel.hasInstrSchedModel())
      continue;
    const MCSchedClassDesc *SC = SchedModel.resolveSchedClass(MI);
    if (!SC->isValid())
      continue;

    for (TargetSchedModel::ProcResIter
         PI = SchedModel.getWriteProcResBegin(SC),
         PE = SchedModel.getWriteProcResEnd(SC); PI != PE; ++PI) {
      assert(PI->ProcResourceIdx < PRKinds && "Bad processor resource kind");
      PRCycles[PI->ProcResourceIdx] += PI->Cycles;
    }
  }
  FBI->InstrCount = InstrCount;

  // Scale the resource cycles so they are comparable.
  unsigned PROffset = MBB->getNumber() * PRKinds;
  for (unsigned K = 0; K != PRKinds; ++K)
    ProcResourceCycles[PROffset + K] =
      PRCycles[K] * SchedModel.getResourceFactor(K);

  return FBI;
}

Example #2

File: MachineTraceMetrics.cpp Project: stephenmcgruer/LLVM-ARCompact-2

/// Compute the resource usage in basic block MBB.
const MachineTraceMetrics::FixedBlockInfo*
MachineTraceMetrics::getResources(const MachineBasicBlock *MBB) {
  assert(MBB && "No basic block");
  FixedBlockInfo *FBI = &BlockInfo[MBB->getNumber()];
  if (FBI->hasResources())
    return FBI;

  // Compute resource usage in the block.
  // FIXME: Compute per-functional unit counts.
  FBI->HasCalls = false;
  unsigned InstrCount = 0;
  for (MachineBasicBlock::const_iterator I = MBB->begin(), E = MBB->end();
       I != E; ++I) {
    const MachineInstr *MI = I;
    if (MI->isTransient())
      continue;
    ++InstrCount;
    if (MI->isCall())
      FBI->HasCalls = true;
  }
  FBI->InstrCount = InstrCount;
  return FBI;
}