1//===- MachineUniformityAnalysis.h ---------------------------*- 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/// \file
10/// \brief Machine IR instance of the generic uniformity analysis
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_CODEGEN_MACHINEUNIFORMITYANALYSIS_H
15#define LLVM_CODEGEN_MACHINEUNIFORMITYANALYSIS_H
16
17#include "llvm/ADT/GenericUniformityInfo.h"
18#include "llvm/CodeGen/MachineCycleAnalysis.h"
19#include "llvm/CodeGen/MachineDominators.h"
20#include "llvm/CodeGen/MachinePassManager.h"
21#include "llvm/CodeGen/MachineSSAContext.h"
22
23namespace llvm {
24
25extern template class GenericUniformityInfo<MachineSSAContext>;
26using MachineUniformityInfo = GenericUniformityInfo<MachineSSAContext>;
27
28/// \brief Compute uniformity information for a Machine IR function.
29///
30/// If \p HasBranchDivergence is false, produces a dummy result which assumes
31/// everything is uniform.
32MachineUniformityInfo computeMachineUniformityInfo(
33 MachineFunction &F, const MachineCycleInfo &cycleInfo,
34 const MachineDominatorTree &domTree, bool HasBranchDivergence);
35
36/// Legacy analysis pass which computes a \ref MachineUniformityInfo.
37class MachineUniformityAnalysisPass : public MachineFunctionPass {
38 MachineUniformityInfo UI;
39
40public:
41 static char ID;
42
43 MachineUniformityAnalysisPass();
44
45 MachineUniformityInfo &getUniformityInfo() { return UI; }
46 const MachineUniformityInfo &getUniformityInfo() const { return UI; }
47
48 bool runOnMachineFunction(MachineFunction &F) override;
49 void getAnalysisUsage(AnalysisUsage &AU) const override;
50 void print(raw_ostream &OS, const Module *M = nullptr) const override;
51
52 // TODO: verify analysis
53};
54
55class MachineUniformityAnalysis
56 : public AnalysisInfoMixin<MachineUniformityAnalysis> {
57 friend AnalysisInfoMixin<MachineUniformityAnalysis>;
58 static AnalysisKey Key;
59
60public:
61 using Result = MachineUniformityInfo;
62 Result run(MachineFunction &MF, MachineFunctionAnalysisManager &MFAM);
63};
64
65class MachineUniformityPrinterPass
66 : public PassInfoMixin<MachineUniformityAnalysis> {
67 raw_ostream &OS;
68
69public:
70 explicit MachineUniformityPrinterPass(raw_ostream &OS) : OS(OS) {}
71 PreservedAnalyses run(MachineFunction &MF,
72 MachineFunctionAnalysisManager &MFAM);
73 static bool isRequired() { return true; }
74};
75
76} // namespace llvm
77
78#endif // LLVM_CODEGEN_MACHINEUNIFORMITYANALYSIS_H
79