330d8983d2
In a nutshell, this moves our libomptarget code to populate the offload subproject. With this commit, users need to enable the new LLVM/Offload subproject as a runtime in their cmake configuration. No further changes are expected for downstream code. Tests and other components still depend on OpenMP and have also not been renamed. The results below are for a build in which OpenMP and Offload are enabled runtimes. In addition to the pure `git mv`, we needed to adjust some CMake files. Nothing is intended to change semantics. ``` ninja check-offload ``` Works with the X86 and AMDGPU offload tests ``` ninja check-openmp ``` Still works but doesn't build offload tests anymore. ``` ls install/lib ``` Shows all expected libraries, incl. - `libomptarget.devicertl.a` - `libomptarget-nvptx-sm_90.bc` - `libomptarget.rtl.amdgpu.so` -> `libomptarget.rtl.amdgpu.so.18git` - `libomptarget.so` -> `libomptarget.so.18git` Fixes: https://github.com/llvm/llvm-project/issues/75124 --------- Co-authored-by: Saiyedul Islam <Saiyedul.Islam@amd.com>
89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
//===-- Shared/Utils.h - Target independent OpenMP target RTL -- 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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//
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// Routines and classes used to provide useful functionalities like string
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// parsing and environment variables.
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//
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//===----------------------------------------------------------------------===//
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#ifndef OMPTARGET_SHARED_UTILS_H
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#define OMPTARGET_SHARED_UTILS_H
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#include "llvm/ADT/StringRef.h"
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#include "Debug.h"
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#include <atomic>
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#include <cassert>
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#include <limits>
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#include <memory>
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namespace llvm {
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namespace omp {
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namespace target {
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/// Utility class for thread-safe reference counting. Any class that needs
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/// objects' reference counting can inherit from this entity or have it as a
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/// class data member.
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template <typename Ty = uint32_t,
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std::memory_order MemoryOrder = std::memory_order_relaxed>
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struct RefCountTy {
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/// Create a refcount object initialized to zero.
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RefCountTy() : Refs(0) {}
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~RefCountTy() { assert(Refs == 0 && "Destroying with non-zero refcount"); }
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/// Increase the reference count atomically.
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void increase() { Refs.fetch_add(1, MemoryOrder); }
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/// Decrease the reference count and return whether it became zero. Decreasing
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/// the counter in more units than it was previously increased results in
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/// undefined behavior.
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bool decrease() {
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Ty Prev = Refs.fetch_sub(1, MemoryOrder);
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assert(Prev > 0 && "Invalid refcount");
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return (Prev == 1);
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}
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Ty get() const { return Refs.load(MemoryOrder); }
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private:
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/// The atomic reference counter.
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std::atomic<Ty> Refs;
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};
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/// Return the difference (in bytes) between \p Begin and \p End.
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template <typename Ty = char>
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ptrdiff_t getPtrDiff(const void *End, const void *Begin) {
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return reinterpret_cast<const Ty *>(End) -
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reinterpret_cast<const Ty *>(Begin);
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}
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/// Return \p Ptr advanced by \p Offset bytes.
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template <typename Ty> Ty *advanceVoidPtr(Ty *Ptr, int64_t Offset) {
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static_assert(std::is_void<Ty>::value);
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return const_cast<char *>(reinterpret_cast<const char *>(Ptr) + Offset);
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}
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/// Return \p Ptr aligned to \p Alignment bytes.
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template <typename Ty> Ty *alignPtr(Ty *Ptr, int64_t Alignment) {
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size_t Space = std::numeric_limits<size_t>::max();
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return std::align(Alignment, sizeof(char), Ptr, Space);
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}
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/// Round up \p V to a \p Boundary.
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template <typename Ty> inline Ty roundUp(Ty V, Ty Boundary) {
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return (V + Boundary - 1) / Boundary * Boundary;
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}
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} // namespace target
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} // namespace omp
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} // namespace llvm
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#endif // OMPTARGET_SHARED_UTILS_H
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