77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
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//===- IPO/OpenMPOpt.h - Collection of OpenMP optimizations -----*- 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_TRANSFORMS_IPO_OPENMP_OPT_H
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#define LLVM_TRANSFORMS_IPO_OPENMP_OPT_H
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#include "llvm/Analysis/CGSCCPassManager.h"
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#include "llvm/Analysis/LazyCallGraph.h"
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#include "llvm/IR/PassManager.h"
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namespace llvm {
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namespace omp {
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/// Summary of a kernel (=entry point for target offloading).
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using Kernel = Function *;
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/// Helper to remember if the module contains OpenMP (runtime calls), to be used
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/// foremost with containsOpenMP.
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struct OpenMPInModule {
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OpenMPInModule &operator=(bool Found) {
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if (Found)
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Value = OpenMPInModule::OpenMP::FOUND;
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else
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Value = OpenMPInModule::OpenMP::NOT_FOUND;
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return *this;
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}
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bool isKnown() { return Value != OpenMP::UNKNOWN; }
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operator bool() { return Value != OpenMP::NOT_FOUND; }
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/// Does this function \p F contain any OpenMP runtime calls?
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bool containsOMPRuntimeCalls(Function *F) const {
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return FuncsWithOMPRuntimeCalls.contains(F);
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}
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/// Return the known kernels (=GPU entry points) in the module.
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SmallPtrSetImpl<Kernel> &getKernels() { return Kernels; }
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/// Identify kernels in the module and populate the Kernels set.
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void identifyKernels(Module &M);
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private:
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enum class OpenMP { FOUND, NOT_FOUND, UNKNOWN } Value = OpenMP::UNKNOWN;
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friend bool containsOpenMP(Module &M, OpenMPInModule &OMPInModule);
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/// In which functions are OpenMP runtime calls present?
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SmallPtrSet<Function *, 32> FuncsWithOMPRuntimeCalls;
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/// Collection of known kernels (=GPU entry points) in the module.
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SmallPtrSet<Kernel, 8> Kernels;
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};
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/// Helper to determine if \p M contains OpenMP (runtime calls).
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bool containsOpenMP(Module &M, OpenMPInModule &OMPInModule);
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} // namespace omp
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/// OpenMP optimizations pass.
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class OpenMPOptPass : public PassInfoMixin<OpenMPOptPass> {
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/// Helper to remember if the module contains OpenMP (runtime calls).
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omp::OpenMPInModule OMPInModule;
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public:
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PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
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LazyCallGraph &CG, CGSCCUpdateResult &UR);
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};
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} // end namespace llvm
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#endif // LLVM_TRANSFORMS_IPO_OPENMP_OPT_H
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