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/*========================== begin_copyright_notice ============================
Copyright (C) 2022 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
////////////////////////////////////////////////////////////////////////////
// @brief Legalizes RuntimeValue calls for push analysis.
//
// 1) RuntimeValue vector must be GRF aligned if it's size is larger than or equal to one GRF.
// RuntimeValue vector must fit in one GRF if its size is less than one GRF.
// Replace:
// %15 = call <6 x i32> @llvm.genx.GenISA.RuntimeValue.v6i32(i32 4)
// %17 = extractelement <6 x i32> %15, i32 %0
// with:
// %15 = call <10 x i32> @llvm.genx.GenISA.RuntimeValue.v10i32(i32 0)
// %16 = add i32 %0, 4
// %17 = extractelement <10 x i32> %15, i32 %16
//
// 2) RuntimeValue vectors can not overlap:
// Replace:
// %15 = call <10 x i32> @llvm.genx.GenISA.RuntimeValue.v10i32(i32 0)
// %17 = extractelement <10 x i32> %15, i32 %0
// %25 = call <12 x i32> @llvm.genx.GenISA.RuntimeValue.v12i32(i32 8)
// %27 = extractelement <12 x i32> % 25, i32 %0
// with:
// %15 = call <20 x i32> @llvm.genx.GenISA.RuntimeValue.v20i32(i32 0)
// %17 = extractelement <20 x i32> %15, i32 %0
// %25 = call <20 x i32> @llvm.genx.GenISA.RuntimeValue.v20i32(i32 0)
// %26 = add i32 %0, 8
// %27 = extractelement <20 x i32> %25, i32 %26
//
// 3) RuntimeValue calls returning single scalars are converted to extracts of elements
// from corresponding RuntimeValue vector.
// Replace:
// %1 = call <3 x i32> @llvm.genx.GenISA.RuntimeValue.v3i32(i32 4)
// %3 = call i32 @llvm.genx.GenISA.RuntimeValue.i32(i32 4)
// %14 = call i32 @llvm.genx.GenISA.RuntimeValue.i32(i32 5)
// with:
// %4 = call <3 x i32> @llvm.genx.GenISA.RuntimeValue.v3i32(i32 4)
// %1 = call <3 x i32> @llvm.genx.GenISA.RuntimeValue.v3i32(i32 4)
// %2 = extractelement <3 x i32> %1, i32 0
// %15 = call <3 x i32> @llvm.genx.GenISA.RuntimeValue.v3i32(i32 4)
// %16 = extractelement <3 x i32> %15, i32 1
//
// Only RuntimeValue vectors of 32-bit elements are supported at the moment.
#pragma once
#include "common/LLVMWarningsPush.hpp"
#include "llvm/Pass.h"
#include "llvm/IR/Module.h"
#include "llvm/ADT/StringRef.h"
#include "common/LLVMWarningsPop.hpp"
namespace IGC
{
class RuntimeValueLegalizationPass : public llvm::ModulePass
{
public:
RuntimeValueLegalizationPass();
virtual bool runOnModule(llvm::Module& module) override;
virtual void getAnalysisUsage(llvm::AnalysisUsage& AU) const override;
virtual llvm::StringRef getPassName() const override
{
return "RuntimeValueLegalizationPass";
}
static char ID;
};
}
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