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280f00a153
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328187 91177308-0d34-0410-b5e6-96231b3b80d8
52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
//===--------------------- Support.cpp --------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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/// \file
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///
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/// This file implements a few helper functions used by various backend
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/// components.
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///
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//===----------------------------------------------------------------------===//
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#include "Support.h"
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#include "llvm/MC/MCSchedule.h"
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namespace mca {
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using namespace llvm;
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void computeProcResourceMasks(const MCSchedModel &SM,
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SmallVectorImpl<uint64_t> &Masks) {
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unsigned ProcResourceID = 0;
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// Create a unique bitmask for every processor resource unit.
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// Skip resource at index 0, since it always references 'InvalidUnit'.
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Masks.resize(SM.getNumProcResourceKinds());
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for (unsigned I = 1, E = SM.getNumProcResourceKinds(); I < E; ++I) {
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const MCProcResourceDesc &Desc = *SM.getProcResource(I);
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if (Desc.SubUnitsIdxBegin)
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continue;
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Masks[I] = 1ULL << ProcResourceID;
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ProcResourceID++;
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}
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// Create a unique bitmask for every processor resource group.
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for (unsigned I = 1, E = SM.getNumProcResourceKinds(); I < E; ++I) {
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const MCProcResourceDesc &Desc = *SM.getProcResource(I);
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if (!Desc.SubUnitsIdxBegin)
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continue;
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Masks[I] = 1ULL << ProcResourceID;
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for (unsigned U = 0; U < Desc.NumUnits; ++U) {
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uint64_t OtherMask = Masks[Desc.SubUnitsIdxBegin[U]];
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Masks[I] |= OtherMask;
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}
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ProcResourceID++;
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}
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}
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} // namespace mca
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