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114 lines
3.5 KiB
114 lines
3.5 KiB
4 months ago
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//===--- CodeGenHwModes.cpp -----------------------------------------------===//
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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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// Classes to parse and store HW mode information for instruction selection
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//===----------------------------------------------------------------------===//
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#include "CodeGenHwModes.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/TableGen/Error.h"
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#include "llvm/TableGen/Record.h"
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using namespace llvm;
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StringRef CodeGenHwModes::DefaultModeName = "DefaultMode";
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HwMode::HwMode(Record *R) {
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Name = R->getName();
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Features = std::string(R->getValueAsString("Features"));
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}
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LLVM_DUMP_METHOD
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void HwMode::dump() const {
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dbgs() << Name << ": " << Features << '\n';
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}
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HwModeSelect::HwModeSelect(Record *R, CodeGenHwModes &CGH) {
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std::vector<Record*> Modes = R->getValueAsListOfDefs("Modes");
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std::vector<Record*> Objects = R->getValueAsListOfDefs("Objects");
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if (Modes.size() != Objects.size()) {
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PrintError(R->getLoc(), "in record " + R->getName() +
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" derived from HwModeSelect: the lists Modes and Objects should "
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"have the same size");
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report_fatal_error("error in target description.");
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}
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for (unsigned i = 0, e = Modes.size(); i != e; ++i) {
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unsigned ModeId = CGH.getHwModeId(Modes[i]->getName());
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Items.push_back(std::make_pair(ModeId, Objects[i]));
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}
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}
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LLVM_DUMP_METHOD
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void HwModeSelect::dump() const {
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dbgs() << '{';
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for (const PairType &P : Items)
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dbgs() << " (" << P.first << ',' << P.second->getName() << ')';
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dbgs() << " }\n";
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}
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CodeGenHwModes::CodeGenHwModes(RecordKeeper &RK) : Records(RK) {
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std::vector<Record*> MRs = Records.getAllDerivedDefinitions("HwMode");
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// The default mode needs a definition in the .td sources for TableGen
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// to accept references to it. We need to ignore the definition here.
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for (auto I = MRs.begin(), E = MRs.end(); I != E; ++I) {
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if ((*I)->getName() != DefaultModeName)
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continue;
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MRs.erase(I);
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break;
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}
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for (Record *R : MRs) {
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Modes.emplace_back(R);
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unsigned NewId = Modes.size();
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ModeIds.insert(std::make_pair(Modes[NewId-1].Name, NewId));
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}
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std::vector<Record*> MSs = Records.getAllDerivedDefinitions("HwModeSelect");
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for (Record *R : MSs) {
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auto P = ModeSelects.emplace(std::make_pair(R, HwModeSelect(R, *this)));
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assert(P.second);
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(void)P;
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}
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}
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unsigned CodeGenHwModes::getHwModeId(StringRef Name) const {
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if (Name == DefaultModeName)
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return DefaultMode;
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auto F = ModeIds.find(Name);
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assert(F != ModeIds.end() && "Unknown mode name");
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return F->second;
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}
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const HwModeSelect &CodeGenHwModes::getHwModeSelect(Record *R) const {
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auto F = ModeSelects.find(R);
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assert(F != ModeSelects.end() && "Record is not a \"mode select\"");
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return F->second;
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}
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LLVM_DUMP_METHOD
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void CodeGenHwModes::dump() const {
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dbgs() << "Modes: {\n";
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for (const HwMode &M : Modes) {
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dbgs() << " ";
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M.dump();
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}
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dbgs() << "}\n";
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dbgs() << "ModeIds: {\n";
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for (const auto &P : ModeIds)
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dbgs() << " " << P.first() << " -> " << P.second << '\n';
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dbgs() << "}\n";
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dbgs() << "ModeSelects: {\n";
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for (const auto &P : ModeSelects) {
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dbgs() << " " << P.first->getName() << " -> ";
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P.second.dump();
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}
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dbgs() << "}\n";
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}
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