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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(bool ForceUniformTexture = false, bool ForceUniformBuffer = false);
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_forceUniformTexture;
bool m_forceUniformBuffer;
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 &);
} // namespace IGC
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