/// 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;
}
/// 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;
}
