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//===--- CodeGenHwModes.cpp -----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// Classes to parse and store HW mode information for instruction selection
//===----------------------------------------------------------------------===//
#include "CodeGenHwModes.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
using namespace llvm;
StringRef CodeGenHwModes::DefaultModeName = "DefaultMode";
HwMode::HwMode(const Record *R) {
Name = R->getName();
Features = R->getValueAsString("Features").str();
SmallString<128> PredicateCheck;
raw_svector_ostream OS(PredicateCheck);
ListSeparator LS(" && ");
for (const Record *Pred : R->getValueAsListOfDefs("Predicates")) {
StringRef CondString = Pred->getValueAsString("CondString");
if (CondString.empty())
continue;
OS << LS << '(' << CondString << ')';
}
Predicates = std::string(PredicateCheck);
}
LLVM_DUMP_METHOD
void HwMode::dump() const { dbgs() << Name << ": " << Features << '\n'; }
HwModeSelect::HwModeSelect(const Record *R, CodeGenHwModes &CGH) {
std::vector<const Record *> Modes = R->getValueAsListOfDefs("Modes");
std::vector<const Record *> Objects = R->getValueAsListOfDefs("Objects");
for (auto [Mode, Object] : zip_equal(Modes, Objects)) {
unsigned ModeId = CGH.getHwModeId(Mode);
Items.emplace_back(ModeId, Object);
}
}
LLVM_DUMP_METHOD
void HwModeSelect::dump() const {
dbgs() << '{';
for (const PairType &P : Items)
dbgs() << " (" << P.first << ',' << P.second->getName() << ')';
dbgs() << " }\n";
}
CodeGenHwModes::CodeGenHwModes(const RecordKeeper &RK) : Records(RK) {
for (const Record *R : Records.getAllDerivedDefinitions("HwMode")) {
// The default mode needs a definition in the .td sources for TableGen
// to accept references to it. We need to ignore the definition here.
if (R->getName() == DefaultModeName)
continue;
Modes.emplace_back(R);
ModeIds.try_emplace(R, Modes.size());
}
assert(Modes.size() <= 32 && "number of HwModes exceeds maximum of 32");
for (const Record *R : Records.getAllDerivedDefinitions("HwModeSelect")) {
auto P = ModeSelects.emplace(R, HwModeSelect(R, *this));
assert(P.second);
(void)P;
}
}
unsigned CodeGenHwModes::getHwModeId(const Record *R) const {
if (R->getName() == DefaultModeName)
return DefaultMode;
auto F = ModeIds.find(R);
assert(F != ModeIds.end() && "Unknown mode name");
return F->second;
}
const HwModeSelect &CodeGenHwModes::getHwModeSelect(const Record *R) const {
auto F = ModeSelects.find(R);
assert(F != ModeSelects.end() && "Record is not a \"mode select\"");
return F->second;
}
LLVM_DUMP_METHOD
void CodeGenHwModes::dump() const {
dbgs() << "Modes: {\n";
for (const HwMode &M : Modes) {
dbgs() << " ";
M.dump();
}
dbgs() << "}\n";
dbgs() << "ModeIds: {\n";
for (const auto &P : ModeIds)
dbgs() << " " << P.first->getName() << " -> " << P.second << '\n';
dbgs() << "}\n";
dbgs() << "ModeSelects: {\n";
for (const auto &P : ModeSelects) {
dbgs() << " " << P.first->getName() << " -> ";
P.second.dump();
}
dbgs() << "}\n";
}
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