mirror of
https://github.com/revng/revng
synced 2026-06-21 14:07:57 +00:00
Alessandro Di Federico
ee0b8f44c1
This is a big step to split revng-lift in two parts: one that only writes the model and one that actually lifts to LLVM IR. * Introduce `revng import binary` * Split off `BinaryFile.h` * Drop `revng.h` * `GeneratedCodeBasicInfo`: use model * Reduce role of `GeneratedCodeBasicInfo` in favor of `model::Architecture` and `model::Register` methods * `CodeGenerator`: adopt `RawBinaryView` and model * `JumpTargetManager`: adopt `RawBinaryView` and model * `ExternalJumpsHandler`: adopt model * `InstructionTranslator`: discard `Architecture` in favor of `EndianessMismatch` * Many other changes
56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
//
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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/ADT/DenseMap.h"
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#include "llvm/ADT/GraphTraits.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/iterator_range.h"
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#include "llvm/IR/BasicBlock.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/IR/Instruction.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/Support/Casting.h"
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#include "revng/MFP/MFP.h"
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#include "revng/Model/Binary.h"
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#include "Analyses.h"
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namespace ABIAnalyses::DeadReturnValuesOfFunctionCall {
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using namespace llvm;
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using namespace ABIAnalyses;
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std::map<const GlobalVariable *, State>
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analyze(const BasicBlock *CallSiteBlock, const GeneratedCodeBasicInfo &GCBI) {
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using MFI = MFIAnalysis<true, CoreLattice>;
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std::map<const GlobalVariable *, State> RegNoOrDead{};
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MFI Instance{ { getPreCallHook(CallSiteBlock), GCBI } };
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MFI::LatticeElement InitialValue;
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MFI::LatticeElement ExtremalValue(CoreLattice::ExtremalLatticeElement);
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auto *Start = CallSiteBlock->getUniqueSuccessor();
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if (!Start)
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return RegNoOrDead;
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auto
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Results = MFP::getMaximalFixedPoint<MFI, MFI::GT, MFI::LGT>(Instance,
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Start,
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InitialValue,
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ExtremalValue,
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{ Start },
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{ Start });
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for (auto &[BB, Result] : Results) {
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for (auto &[GV, RegState] : Result.OutValue) {
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if (RegState == CoreLattice::NoOrDead) {
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RegNoOrDead[GV] = State::NoOrDead;
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}
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}
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}
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return RegNoOrDead;
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}
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} // namespace ABIAnalyses::DeadReturnValuesOfFunctionCall
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