1 //===- IPO/OpenMPOpt.h - Collection of OpenMP optimizations -----*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_TRANSFORMS_IPO_OPENMPOPT_H
10 #define LLVM_TRANSFORMS_IPO_OPENMPOPT_H
11 
12 #include "llvm/Analysis/CGSCCPassManager.h"
13 #include "llvm/Analysis/LazyCallGraph.h"
14 #include "llvm/IR/PassManager.h"
15 
16 namespace llvm {
17 
18 namespace omp {
19 
20 /// Summary of a kernel (=entry point for target offloading).
21 using Kernel = Function *;
22 
23 /// Set of kernels in the module
24 using KernelSet = SetVector<Kernel>;
25 
26 /// Helper to determine if \p M contains OpenMP.
27 bool containsOpenMP(Module &M);
28 
29 /// Helper to determine if \p M is a OpenMP target offloading device module.
30 bool isOpenMPDevice(Module &M);
31 
32 /// Return true iff \p Fn is a GPU kernel; \p Fn has the "kernel" attribute.
33 bool isKernel(Function &Fn);
34 
35 /// Get OpenMP device kernels in \p M.
36 KernelSet getDeviceKernels(Module &M);
37 
38 } // namespace omp
39 
40 /// OpenMP optimizations pass.
41 class OpenMPOptPass : public PassInfoMixin<OpenMPOptPass> {
42 public:
43   OpenMPOptPass() = default;
44   OpenMPOptPass(ThinOrFullLTOPhase LTOPhase) : LTOPhase(LTOPhase) {}
45 
46   PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
47 
48 private:
49   const ThinOrFullLTOPhase LTOPhase = ThinOrFullLTOPhase::None;
50 };
51 
52 class OpenMPOptCGSCCPass : public PassInfoMixin<OpenMPOptCGSCCPass> {
53 public:
54   OpenMPOptCGSCCPass() = default;
55   OpenMPOptCGSCCPass(ThinOrFullLTOPhase LTOPhase) : LTOPhase(LTOPhase) {}
56 
57   PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
58                         LazyCallGraph &CG, CGSCCUpdateResult &UR);
59 
60 private:
61   const ThinOrFullLTOPhase LTOPhase = ThinOrFullLTOPhase::None;
62 };
63 
64 } // end namespace llvm
65 
66 #endif // LLVM_TRANSFORMS_IPO_OPENMPOPT_H
67