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Reland #118503. Added a fix for builds with `-DBUILD_SHARED_LIBS=ON` (see last commit). Otherwise the changes are identical. --- ### New API Previous discussions at the LLVM/Offload meeting have brought up the need for a new API for exposing the functionality of the plugins. This change introduces a very small subset of a new API, which is primarily for testing the offload tooling and demonstrating how a new API can fit into the existing code base without being too disruptive. Exact designs for these entry points and future additions can be worked out over time. The new API does however introduce the bare minimum functionality to implement device discovery for Unified Runtime and SYCL. This means that the `urinfo` and `sycl-ls` tools can be used on top of Offload. A (rough) implementation of a Unified Runtime adapter (aka plugin) for Offload is available [here](https://github.com/callumfare/unified-runtime/tree/offload_adapter). Our intention is to maintain this and use it to implement and test Offload API changes with SYCL. ### Demoing the new API ```sh # From the runtime build directory $ ninja LibomptUnitTests $ OFFLOAD_TRACE=1 ./offload/unittests/OffloadAPI/offload.unittests ``` ### Open questions and future work * Only some of the available device info is exposed, and not all the possible device queries needed for SYCL are implemented by the plugins. A sensible next step would be to refactor and extend the existing device info queries in the plugins. The existing info queries are all strings, but the new API introduces the ability to return any arbitrary type. * It may be sensible at some point for the plugins to implement the new API directly, and the higher level code on top of it could be made generic, but this is more of a long-term possibility.
102 lines
2.9 KiB
C++
102 lines
2.9 KiB
C++
//===- offload-tblgen/offload-tblgen.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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//
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// This is a Tablegen tool that produces source files for the Offload project.
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// See offload/API/README.md for more information.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/InitLLVM.h"
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#include "llvm/TableGen/Main.h"
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#include "llvm/TableGen/Record.h"
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#include "Generators.hpp"
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namespace llvm {
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namespace offload {
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namespace tblgen {
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enum ActionType {
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PrintRecords,
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DumpJSON,
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GenAPI,
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GenFuncNames,
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GenImplFuncDecls,
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GenEntryPoints,
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GenPrintHeader,
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GenExports
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};
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namespace {
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cl::opt<ActionType> Action(
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cl::desc("Action to perform:"),
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cl::values(
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clEnumValN(PrintRecords, "print-records",
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"Print all records to stdout (default)"),
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clEnumValN(DumpJSON, "dump-json",
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"Dump all records as machine-readable JSON"),
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clEnumValN(GenAPI, "gen-api", "Generate Offload API header contents"),
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clEnumValN(GenFuncNames, "gen-func-names",
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"Generate a list of all Offload API function names"),
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clEnumValN(
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GenImplFuncDecls, "gen-impl-func-decls",
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"Generate declarations for Offload API implementation functions"),
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clEnumValN(GenEntryPoints, "gen-entry-points",
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"Generate Offload API wrapper function definitions"),
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clEnumValN(GenPrintHeader, "gen-print-header",
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"Generate Offload API print header"),
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clEnumValN(GenExports, "gen-exports",
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"Generate export file for the Offload library")));
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}
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static bool OffloadTableGenMain(raw_ostream &OS, const RecordKeeper &Records) {
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switch (Action) {
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case PrintRecords:
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OS << Records;
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break;
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case DumpJSON:
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EmitJSON(Records, OS);
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break;
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case GenAPI:
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EmitOffloadAPI(Records, OS);
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break;
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case GenFuncNames:
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EmitOffloadFuncNames(Records, OS);
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break;
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case GenImplFuncDecls:
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EmitOffloadImplFuncDecls(Records, OS);
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break;
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case GenEntryPoints:
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EmitOffloadEntryPoints(Records, OS);
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break;
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case GenPrintHeader:
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EmitOffloadPrintHeader(Records, OS);
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break;
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case GenExports:
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EmitOffloadExports(Records, OS);
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break;
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}
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return false;
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}
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int OffloadTblgenMain(int argc, char **argv) {
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InitLLVM y(argc, argv);
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cl::ParseCommandLineOptions(argc, argv);
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return TableGenMain(argv[0], &OffloadTableGenMain);
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}
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} // namespace tblgen
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} // namespace offload
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} // namespace llvm
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using namespace llvm;
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using namespace offload::tblgen;
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int main(int argc, char **argv) { return OffloadTblgenMain(argc, argv); }
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