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//===--------------------- Support.cpp --------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
///
/// This file implements a few helper functions used by various backend
/// components.
///
//===----------------------------------------------------------------------===//
#include "Support.h"
#include "llvm/MC/MCSchedule.h"
namespace mca {
using namespace llvm;
void computeProcResourceMasks(const MCSchedModel &SM,
SmallVectorImpl<uint64_t> &Masks) {
unsigned ProcResourceID = 0;
// Create a unique bitmask for every processor resource unit.
// Skip resource at index 0, since it always references 'InvalidUnit'.
Masks.resize(SM.getNumProcResourceKinds());
for (unsigned I = 1, E = SM.getNumProcResourceKinds(); I < E; ++I) {
const MCProcResourceDesc &Desc = *SM.getProcResource(I);
if (Desc.SubUnitsIdxBegin)
continue;
Masks[I] = 1ULL << ProcResourceID;
ProcResourceID++;
}
// Create a unique bitmask for every processor resource group.
for (unsigned I = 1, E = SM.getNumProcResourceKinds(); I < E; ++I) {
const MCProcResourceDesc &Desc = *SM.getProcResource(I);
if (!Desc.SubUnitsIdxBegin)
continue;
Masks[I] = 1ULL << ProcResourceID;
for (unsigned U = 0; U < Desc.NumUnits; ++U) {
uint64_t OtherMask = Masks[Desc.SubUnitsIdxBegin[U]];
Masks[I] |= OtherMask;
}
ProcResourceID++;
}
}
} // namespace mca
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