mirror of
https://github.com/revng/revng
synced 2026-06-21 14:07:57 +00:00
Antonio Frighetto
cf79b2d6e3
This new pass: - Adds CSV alias information (previously done by `JTM::aliasAnalysis`) - Optionally segregates the direct stack accesses from all the other memory accesses by adding further alias information - Canonicalizes the inttoptr + add + ptrtoint into a getelementptr, in order to have typesafe pointer arithmetics and allow optimizations to happen.
47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
#pragma once
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//
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// This file is distributed under the MIT License. See LICENSE.md for details.
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//
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/MDBuilder.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/IR/Value.h"
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#include "revng/BasicAnalyses/GeneratedCodeBasicInfo.h"
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#include "revng/Support/revng.h"
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struct CSVAliasAnalysisInterface {
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GeneratedCodeBasicInfo *GCBI;
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llvm::MDNode *AliasDomain;
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friend class SegregateDirectStackAccesses;
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protected:
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CSVAliasAnalysisInterface() : GCBI(nullptr) {}
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};
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template<bool SegregateStackAccesses = false>
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class CSVAliasAnalysisPass
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: public CSVAliasAnalysisInterface,
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public llvm::PassInfoMixin<CSVAliasAnalysisPass<SegregateStackAccesses>> {
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struct CSVAliasInfo {
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llvm::MDNode *AliasScope;
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llvm::MDNode *AliasSet;
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llvm::MDNode *NoAliasSet;
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};
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std::map<const llvm::GlobalVariable *, CSVAliasInfo> CSVAliasInfoMap;
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std::vector<llvm::Metadata *> AllCSVScopes;
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public:
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CSVAliasAnalysisPass() = default;
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llvm::PreservedAnalyses
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run(llvm::Function &F, llvm::FunctionAnalysisManager &FAM);
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private:
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void initializeAliasInfo(llvm::Module &M);
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void decorateMemoryAccesses(llvm::Instruction &I);
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};
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