| //===--------------------- 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 |