81a150656b
Use the predicate condition instead of checkFeatures in *GenDAGISel.inc. This makes the code similar to isel pattern predicates. checkFeatures is still used by code created by SubtargetEmitter so we can't remove the string. Backends need to be careful to keep the string and predicates in sync, but I don't think that's a big issue. I haven't measured it, but this should be a compile time improvement for isel since we don't have to do any of the string processing that's inside checkFeatures. Reviewed By: kparzysz Differential Revision: https://reviews.llvm.org/D146012
126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
//===--- 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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std::vector<Record *> PredicateRecs = R->getValueAsListOfDefs("Predicates");
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SmallString<128> PredicateCheck;
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raw_svector_ostream OS(PredicateCheck);
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ListSeparator LS(" && ");
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for (Record *Pred : PredicateRecs) {
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StringRef CondString = Pred->getValueAsString("CondString");
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if (CondString.empty())
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continue;
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OS << LS << '(' << CondString << ')';
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}
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Predicates = std::string(PredicateCheck);
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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]);
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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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ModeIds.insert(std::make_pair(R, Modes.size()));
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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(Record *R) const {
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if (R->getName() == DefaultModeName)
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return DefaultMode;
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auto F = ModeIds.find(R);
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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->getName() << " -> " << 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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