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/*========================== begin_copyright_notice ============================
Copyright (C) 2017-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#pragma once
#include "Compiler/CodeGenPublic.h"
#include "Compiler/IGCPassSupport.h"
#include "common/LLVMWarningsPush.hpp"
#include "llvm/Pass.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/InstrTypes.h"
#include <llvm/IR/InstVisitor.h>
#include "llvm/IR/Instruction.h"
#include <llvm/PassRegistry.h>
#include "common/LLVMWarningsPop.hpp"
#include <map>
namespace IGC
{
class PullConstantHeuristics : public llvm::ModulePass
{
public:
PullConstantHeuristics() : llvm::ModulePass(ID)
{
initializePullConstantHeuristicsPass(*llvm::PassRegistry::getPassRegistry());
}
virtual void getAnalysisUsage(llvm::AnalysisUsage& AU) const override
{
AU.addRequired<IGC::CodeGenContextWrapper>();
AU.setPreservesAll();
}
bool runOnModule(llvm::Module& M) override;
unsigned getPSDBottleNeckThreshold(const llvm::Function& F);
// This function returns the push constant threshold in 32-byte units.
unsigned getPushConstantThreshold(llvm::Function* F)
{
const CodeGenContext* ctx = getAnalysis<CodeGenContextWrapper>().getCodeGenContext();
if (thresholdMap.find(F) != thresholdMap.end())
{
return thresholdMap[F] * ctx->platform.getGRFSize() / (ctx->platform.getMinPushConstantBufferAlignment() * sizeof(DWORD));
}
const DWORD pushConstantGRFThreshold = IGC_GET_FLAG_VALUE(BlockPushConstantGRFThreshold);
if (pushConstantGRFThreshold != 0xFFFFFFFF)
{
return pushConstantGRFThreshold * ctx->platform.getGRFSize() / (ctx->platform.getMinPushConstantBufferAlignment() * sizeof(DWORD));
}
else
{
IGC_ASSERT_MESSAGE(ctx, "CodeGenContext not initialized.");
return ctx->platform.getBlockPushConstantThreshold();
}
}
static char ID;
private:
std::map<llvm::Function*, unsigned> thresholdMap;
};
}
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