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/*========================== begin_copyright_notice ============================
Copyright (C) 2020-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#pragma once
#include "RTStackFormat.h"
#include "common/MDFrameWork.h"
#include "Compiler/CodeGenPublic.h"
#include "RTBuilder.h"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/IR/Function.h>
#include <llvm/ADT/Optional.h>
#include "common/LLVMWarningsPop.hpp"
namespace IGC {
// Simple class to query the position of each arg in a raytracing shader.
class ArgQuery
{
public:
ArgQuery(const llvm::Function& F, const CodeGenContext& Ctx);
ArgQuery(const FunctionMetaData& FMD);
ArgQuery(CallableShaderTypeMD FuncType, const FunctionMetaData& FMD);
llvm::Argument* getPayloadArg(const llvm::Function *F) const;
llvm::Argument* getHitAttribArg(const llvm::Function *F) const;
private:
// Unlike DXR, Vulkan raytracing allows the optional specification of these
// values.
llvm::Optional<uint32_t> TraceRayPayloadIdx;
llvm::Optional<uint32_t> HitAttributeIdx;
llvm::Optional<uint32_t> CallableShaderPayloadIdx;
CallableShaderTypeMD ShaderTy = NumberOfCallableShaderTypes;
private:
llvm::Optional<uint32_t> getPayloadArgNo() const;
llvm::Optional<uint32_t> getHitAttribArgNo() const;
const llvm::Argument* getArg(
const llvm::Function *F,
llvm::Optional<uint32_t> ArgNo) const;
void init(CallableShaderTypeMD FuncType, const FunctionMetaData& FMD);
};
// When invoking a TraceRay() or CallShader(), these are the arguments that you
// must supply to the callee
class TraceRayRTArgs
{
public:
using ReturnIP = uint64_t;
using PointerSize = uint64_t;
llvm::Value* getReturnIPPtr(
llvm::IRBuilder<>& IRB,
llvm::Type* PayloadTy,
llvm::RTBuilder::SWStackPtrVal* FrameAddr,
const llvm::Twine &FrameName = "");
llvm::Value* getPayloadPtr(
llvm::IRBuilder<>& IRB,
llvm::Type* PayloadTy,
llvm::RTBuilder::SWStackPtrVal* FrameAddr,
const llvm::Twine &FrameName = "");
llvm::Value* getPayloadPaddingPtr(
llvm::IRBuilder<>& IRB,
llvm::Type* PayloadTy,
llvm::RTBuilder::SWStackPtrVal* FrameAddr,
const llvm::Twine &FrameName = "");
bool needPayloadPadding() const;
RayDispatchShaderContext &Ctx;
public:
static constexpr uint32_t ReturnIPSlot = 0;
static constexpr uint32_t PayloadSlot = 1;
static constexpr uint32_t PayloadPaddingSlot = 2;
protected:
TraceRayRTArgs(
RayDispatchShaderContext &Ctx,
RayTracingSWTypes& RTSWTypes,
const llvm::DataLayout &DL);
static uint32_t getReturnIPOffset();
static uint32_t getPayloadOffset();
RayTracingSWTypes& RTSWTypes;
uint32_t SWStackAddrSpace = 0;
const llvm::DataLayout& DL;
private:
using TypeCacheTy = llvm::DenseMap<llvm::PointerType*, llvm::StructType*>;
llvm::PointerType* getType(llvm::PointerType* PayloadTy);
TypeCacheTy ExistingStructs;
TypeCacheTy& getCache();
};
// Handle arguments in a raytracing shader.
class RTArgs : public TraceRayRTArgs
{
public:
RTArgs(
const llvm::Function *RootFunc,
CallableShaderTypeMD FuncType,
llvm::Optional<RTStackFormat::HIT_GROUP_TYPE> HitGroupTy,
RayDispatchShaderContext *Ctx,
const FunctionMetaData& FMD,
RayTracingSWTypes &RTSWTypes,
bool LogStackFrameEntries = false);
public:
llvm::Argument* getPayloadArg(const llvm::Function *F) const;
llvm::Argument* getHitAttribArg(const llvm::Function *F) const;
llvm::Value* getCustomHitAttribPtr(
llvm::IRBuilder<> &IRB,
llvm::RTBuilder::SWStackPtrVal* FrameAddr,
llvm::Type* CustomHitAttrTy);
llvm::Value* getHitKindPtr(
llvm::IRBuilder<> &IRB,
llvm::RTBuilder::SWStackPtrVal* FrameAddr);
bool isProcedural() const;
public:
CallableShaderTypeMD FuncType;
const llvm::Function *RootFunction = nullptr;
protected:
bool LogStackFrameEntries = false;
const FunctionMetaData& FMD;
protected:
uint32_t getCustomHitAttrOffset() const;
uint32_t getHitKindOffset() const;
uint32_t ArgumentSize = 0;
void addArguments();
llvm::SmallVector<llvm::Type*, 4> ArgTys;
std::vector<StackFrameEntry> ArgumentEntries;
void recordArgEntry(
const std::string &Name,
const std::string &TypeRepr,
uint32_t Size,
uint32_t Offset);
llvm::StructType* getArgumentType(llvm::Type* CustomHitAttrTy = nullptr);
private:
using TypeCacheTy =
llvm::DenseMap<
std::pair<llvm::PointerType*, llvm::Type*>,
llvm::StructType*>;
TypeCacheTy ExistingStructs;
TypeCacheTy& getCache();
llvm::Optional<RTStackFormat::HIT_GROUP_TYPE> HitGroupTy;
llvm::Optional<uint32_t> HitKindSlot;
llvm::Optional<uint32_t> CustomHitAttrSlot;
ArgQuery Args;
};
} // namespace IGC
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