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// Implementation for VariableUniformityAnalysis function pass.
//
// Copyright (c) 2023 Michal Babej / Intel Finland Oy
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
namespace llvm {
class Function;
class LoopInfo;
class PostDominatorTree;
class BasicBlock;
class Value;
class Module;
class Loop;
class PreservedAnalyses;
template <typename, typename...> class AnalysisManager;
} // namespace llvm
#include <map>
namespace pocl {
class VariableUniformityAnalysisResult {
public:
bool runOnFunction(llvm::Function &F, llvm::LoopInfo &LI,
llvm::PostDominatorTree &PDT);
bool isUniform(llvm::Function *F, llvm::Value *V);
void setUniform(llvm::Function *F, llvm::Value *V, bool isUniform = true);
void analyzeBBDivergence(llvm::Function *F, llvm::BasicBlock *BB,
llvm::BasicBlock *PreviousUniformBB,
llvm::PostDominatorTree &PDT);
bool shouldBePrivatized(llvm::Function *F, llvm::Value *Val);
bool doFinalization(llvm::Module &M);
void markInductionVariables(llvm::Function &F, llvm::Loop &L);
~VariableUniformityAnalysisResult() { uniformityCache_.clear(); }
// TODO this could be wrong
#if LLVM_MAJOR >= MIN_LLVM_NEW_PASSMANAGER
bool invalidate(llvm::Function &F, const llvm::PreservedAnalyses PA,
llvm::AnalysisManager<llvm::Function>::Invalidator &Inv);
#endif
private:
bool isUniformityAnalyzed(llvm::Function *F, llvm::Value *V) const;
using UniformityIndex = std::map<llvm::Value *, bool>;
using UniformityCache = std::map<llvm::Function *, UniformityIndex>;
mutable UniformityCache uniformityCache_;
};
} // namespace pocl
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