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/*========================== begin_copyright_notice ============================
Copyright (C) 2017-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#pragma once
#include "Compiler/CodeGenContextWrapper.hpp"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/Pass.h>
#include <llvm/IR/InstVisitor.h>
#include <llvm/ADT/DenseSet.h>
#include "common/LLVMWarningsPop.hpp"
namespace IGC
{
/// @brief This pass unset fast math flag on all instructions which influence position output
class PositionDepAnalysis : public llvm::FunctionPass, public llvm::InstVisitor<PositionDepAnalysis>
{
public:
/// @brief Pass identification.
static char ID;
PositionDepAnalysis();
~PositionDepAnalysis() {}
void visitCallInst(llvm::CallInst& I);
virtual llvm::StringRef getPassName() const override
{
return "SetMathPrecisionForPositionOutput";
}
virtual bool runOnFunction(llvm::Function& F) override;
virtual void getAnalysisUsage(llvm::AnalysisUsage& AU) const override
{
AU.setPreservesAll();
AU.addRequired<CodeGenContextWrapper>();
}
bool PositionDependsOnInst(llvm::Instruction* inst);
private:
void UpdateDependency(llvm::Instruction* inst);
llvm::DenseSet<llvm::Instruction*> m_PositionDep;
bool m_newURBEncoding = false;
};
} // namespace IGC
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