2a65d0388c
This is an alternate approach to the patches proposed in D153897 and D153794. Rather than exporting a single header that can be included on the GPU in all circumstances, this patch chooses to instead generate a separate set of headers that only provides the declarations. This can then be used by external tooling to set up what's on the GPU. This leaves room for header hacks for offloading languages without needing to worry about the `libc` implementation. Currently this generates a set of headers that only contain the declarations. These will then be installed to a new clang resource directory called `llvm_libc_wrappers/` which will house the shim code. We can then automaticlaly include this from `clang` when offloading to wrap around the headers while specifying what's on the GPU. Reviewed By: jdoerfert, JonChesterfield Differential Revision: https://reviews.llvm.org/D154036
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
//===-- The main header generation class ------------------------*- C++ -*-===//
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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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#ifndef LLVM_LIBC_UTILS_HDRGEN_GENERATOR_H
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#define LLVM_LIBC_UTILS_HDRGEN_GENERATOR_H
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#include "Command.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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#include <memory>
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#include <string>
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#include <unordered_map>
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namespace llvm {
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class raw_ostream;
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class RecordKeeper;
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} // namespace llvm
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namespace llvm_libc {
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class Command;
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class Generator {
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llvm::StringRef HeaderDefFile;
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const std::vector<std::string> &EntrypointNameList;
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llvm::StringRef StdHeader;
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std::unordered_map<std::string, std::string> &ArgMap;
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std::unique_ptr<Command> IncludeFileCmd;
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std::unique_ptr<Command> PublicAPICmd;
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Command *getCommandHandler(llvm::StringRef CommandName);
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void parseCommandArgs(llvm::StringRef ArgStr, ArgVector &Args);
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void printError(llvm::StringRef Msg);
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public:
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Generator(const std::string &DefFile, const std::vector<std::string> &EN,
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const std::string &Header,
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std::unordered_map<std::string, std::string> &Map)
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: HeaderDefFile(DefFile), EntrypointNameList(EN), StdHeader(Header),
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ArgMap(Map) {}
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void generate(llvm::raw_ostream &OS, llvm::RecordKeeper &Records);
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void generateDecls(llvm::raw_ostream &OS, llvm::RecordKeeper &Records);
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};
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} // namespace llvm_libc
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#endif // LLVM_LIBC_UTILS_HDRGEN_GENERATOR_H
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