71eaf14094
Reduces memory usage compiling backend sources, most notably for AMDGPU by ~98 MB per source on average. AMDGPUGenRegisterInfo.inc is tens of megabytes in size now, and is even larger downstream. At the same time, it is included in nearly all backend sources, typically just for a small portion of its content, resulting in compilation being unnecessarily memory-hungry, which in turn stresses buildbots and wastes their resources. Splitting .inc files also helps avoiding extra ccache misses where changes in .td files don't cause changes in all parts of what previously was a single .inc file. It is thought that rather than building on top of the current single-output-file design of TableGen, e.g., using `split-file`, it would be more preferable to recognise the need for multi-file outputs and give it a proper first-class support directly in TableGen.
94 lines
3.3 KiB
C++
94 lines
3.3 KiB
C++
//===- TableGen.cpp - Top-Level TableGen implementation for LLVM ----------===//
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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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//
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// This file contains the global defintions (mostly command line parameters)
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// shared between llvm-tblgen and llvm-min-tblgen.
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//
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//===----------------------------------------------------------------------===//
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#include "TableGen.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/InitLLVM.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/TableGen/Main.h"
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#include "llvm/TableGen/Record.h"
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#include "llvm/TableGen/SetTheory.h"
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#include "llvm/TableGen/TableGenBackend.h"
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#include <cassert>
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#include <string>
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#include <vector>
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using namespace llvm;
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static cl::OptionCategory PrintEnumsCat("Options for -print-enums");
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static cl::opt<std::string> Class("class",
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cl::desc("Print Enum list for this class"),
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cl::value_desc("class name"),
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cl::cat(PrintEnumsCat));
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static void printRecords(const RecordKeeper &Records, raw_ostream &OS) {
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OS << Records; // No argument, dump all contents
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}
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static void printEnums(const RecordKeeper &Records, raw_ostream &OS) {
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for (const Record *Rec : Records.getAllDerivedDefinitions(Class))
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OS << Rec->getName() << ", ";
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OS << "\n";
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}
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static void printSets(const RecordKeeper &Records, raw_ostream &OS) {
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SetTheory Sets;
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Sets.addFieldExpander("Set", "Elements");
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for (const Record *Rec : Records.getAllDerivedDefinitions("Set")) {
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OS << Rec->getName() << " = [";
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const std::vector<const Record *> *Elts = Sets.expand(Rec);
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assert(Elts && "Couldn't expand Set instance");
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for (const Record *Elt : *Elts)
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OS << ' ' << Elt->getName();
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OS << " ]\n";
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}
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}
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static TableGen::Emitter::Opt X[] = {
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{"print-records", printRecords, "Print all records to stdout (default)",
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true},
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{"print-detailed-records", EmitDetailedRecords,
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"Print full details of all records to stdout"},
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{"null-backend",
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TableGen::Emitter::FnT(
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[](const RecordKeeper &Records, raw_ostream &OS) {}),
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"Do nothing after parsing (useful for timing)"},
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{"dump-json", EmitJSON, "Dump all records as machine-readable JSON"},
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{"print-enums", printEnums, "Print enum values for a class"},
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{"print-sets", printSets, "Print expanded sets for testing DAG exprs"},
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};
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int tblgen_main(int argc, char **argv) {
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InitLLVM X(argc, argv);
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cl::ParseCommandLineOptions(argc, argv);
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std::function<MultiFileTableGenMainFn> MainFn = nullptr;
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return TableGenMain(argv[0], MainFn);
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}
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#ifndef __has_feature
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#define __has_feature(x) 0
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#endif
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#if __has_feature(address_sanitizer) || \
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(defined(__SANITIZE_ADDRESS__) && defined(__GNUC__)) || \
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__has_feature(leak_sanitizer)
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#include <sanitizer/lsan_interface.h>
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// Disable LeakSanitizer for this binary as it has too many leaks that are not
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// very interesting to fix. See compiler-rt/include/sanitizer/lsan_interface.h .
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LLVM_ATTRIBUTE_USED int __lsan_is_turned_off() { return 1; }
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#endif
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