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/*========================== begin_copyright_notice ============================
Copyright (C) 2019-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#pragma once
#include "common/LLVMWarningsPush.hpp"
#include "llvm/Pass.h"
#include <llvm/IR/InstVisitor.h>
#include "common/LLVMWarningsPop.hpp"
#include "Compiler/CISACodeGen/WIAnalysis.hpp"
namespace IGC {
class UniformAssumptions : public llvm::FunctionPass, public llvm::InstVisitor<UniformAssumptions>
{
public:
static char ID; // Pass identification
UniformAssumptions();
virtual bool runOnFunction(llvm::Function& F) override;
void visitCallInst(llvm::CallInst& CI);
virtual void getAnalysisUsage(llvm::AnalysisUsage& AU) const override {
AU.setPreservesCFG();
AU.addRequired<WIAnalysis>();
AU.addRequired<CodeGenContextWrapper>();
}
private:
static const int s_cMaxRecursion = 16;
bool IsAssumedUniform(llvm::Value* V, int recursionLevel = 0) const;
void MakeUniformResourceOperand(llvm::Value* V, llvm::CallInst* CI);
void HoistAssumptions(llvm::Function& F);
void CollectAssumptions(llvm::Function& F);
void OptimizeResourceAccesses(llvm::Function& F);
bool m_changed = false;
WIAnalysis* m_WIAnalysis = nullptr;
CodeGenContext* m_pCodeGenContext = nullptr;
bool m_collectingAssumptions = false;
llvm::SmallVector<llvm::GenIntrinsicInst*, 8> m_assumptions;
};
void initializeUniformAssumptionsPass(llvm::PassRegistry&);
}
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