118 lines
4.0 KiB
C++
118 lines
4.0 KiB
C++
//===-------------------------- CodeRegion.cpp -----------------*- C++ -* -===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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/// \file
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///
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/// This file implements methods from the CodeRegions interface.
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///
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//===----------------------------------------------------------------------===//
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#include "CodeRegion.h"
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namespace llvm {
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namespace mca {
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CodeRegions::CodeRegions(llvm::SourceMgr &S) : SM(S), FoundErrors(false) {
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// Create a default region for the input code sequence.
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Regions.emplace_back(std::make_unique<CodeRegion>("", SMLoc()));
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}
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bool CodeRegion::isLocInRange(SMLoc Loc) const {
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if (RangeEnd.isValid() && Loc.getPointer() > RangeEnd.getPointer())
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return false;
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if (RangeStart.isValid() && Loc.getPointer() < RangeStart.getPointer())
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return false;
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return true;
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}
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void CodeRegions::beginRegion(StringRef Description, SMLoc Loc) {
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if (ActiveRegions.empty()) {
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// Remove the default region if there is at least one user defined region.
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// By construction, only the default region has an invalid start location.
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if (Regions.size() == 1 && !Regions[0]->startLoc().isValid() &&
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!Regions[0]->endLoc().isValid()) {
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ActiveRegions[Description] = 0;
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Regions[0] = std::make_unique<CodeRegion>(Description, Loc);
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return;
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}
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} else {
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auto It = ActiveRegions.find(Description);
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if (It != ActiveRegions.end()) {
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const CodeRegion &R = *Regions[It->second];
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if (Description.empty()) {
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SM.PrintMessage(Loc, SourceMgr::DK_Error,
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"found multiple overlapping anonymous regions");
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SM.PrintMessage(R.startLoc(), SourceMgr::DK_Note,
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"Previous anonymous region was defined here");
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FoundErrors = true;
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return;
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}
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SM.PrintMessage(Loc, SourceMgr::DK_Error,
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"overlapping regions cannot have the same name");
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SM.PrintMessage(R.startLoc(), SourceMgr::DK_Note,
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"region " + Description + " was previously defined here");
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FoundErrors = true;
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return;
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}
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}
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ActiveRegions[Description] = Regions.size();
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Regions.emplace_back(std::make_unique<CodeRegion>(Description, Loc));
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return;
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}
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void CodeRegions::endRegion(StringRef Description, SMLoc Loc) {
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if (Description.empty()) {
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// Special case where there is only one user defined region,
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// and this LLVM-MCA-END directive doesn't provide a region name.
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// In this case, we assume that the user simply wanted to just terminate
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// the only active region.
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if (ActiveRegions.size() == 1) {
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auto It = ActiveRegions.begin();
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Regions[It->second]->setEndLocation(Loc);
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ActiveRegions.erase(It);
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return;
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}
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// Special case where the region end marker applies to the default region.
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if (ActiveRegions.empty() && Regions.size() == 1 &&
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!Regions[0]->startLoc().isValid() && !Regions[0]->endLoc().isValid()) {
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Regions[0]->setEndLocation(Loc);
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return;
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}
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}
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auto It = ActiveRegions.find(Description);
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if (It != ActiveRegions.end()) {
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Regions[It->second]->setEndLocation(Loc);
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ActiveRegions.erase(It);
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return;
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}
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FoundErrors = true;
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SM.PrintMessage(Loc, SourceMgr::DK_Error,
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"found an invalid region end directive");
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if (!Description.empty()) {
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SM.PrintMessage(Loc, SourceMgr::DK_Note,
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"unable to find an active region named " + Description);
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} else {
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SM.PrintMessage(Loc, SourceMgr::DK_Note,
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"unable to find an active anonymous region");
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}
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}
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void CodeRegions::addInstruction(const MCInst &Instruction) {
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SMLoc Loc = Instruction.getLoc();
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for (UniqueCodeRegion &Region : Regions)
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if (Region->isLocInRange(Loc))
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Region->addInstruction(Instruction);
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}
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} // namespace mca
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} // namespace llvm
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