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/*========================== begin_copyright_notice ============================
Copyright (C) 2020-2025 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
//===----------------------------------------------------------------------===//
///
/// This contains a collection of methods to inspect the positions/existence
/// of arguments in a shader as well as methods to compute the types of the
/// argument portion of a stack frame.
///
//===----------------------------------------------------------------------===//
#include "RTStackFormat.h"
#include "RTArgs.h"
#include "MDFrameWork.h"
#include "Probe/Assertion.h"
#include "llvmWrapper/IR/IRBuilder.h"
#include <optional>
#include "Compiler/CISACodeGen/getCacheOpts.h"
using namespace llvm;
using namespace IGC;
using namespace RTStackFormat;
void ArgQuery::init(CallableShaderTypeMD FuncType, const FunctionMetaData &FMD) {
ShaderTy = FuncType;
uint32_t Idx = 0;
switch (FuncType) {
case RayGen:
case CallStackHandler:
break;
case Miss:
if (FMD.rtInfo.hasTraceRayPayload)
TraceRayPayloadIdx = Idx++;
break;
case Callable:
if (FMD.rtInfo.hasCallableData)
CallableShaderPayloadIdx = Idx++;
break;
case ClosestHit:
// For any-hit shaders, there are two cases:
// 1. procedural hit-group: call will be inlined and will use no
// stack (args just passed as normal function args).
// 2. triangle hit-group: ray payload passed, hit attributes will
// come from potentialHit portion of stack.
// TODO: in the procedural case we should have already deleted
// the shader by this point.
case AnyHit:
if (FMD.rtInfo.hasTraceRayPayload)
TraceRayPayloadIdx = Idx++;
if (FMD.rtInfo.hasHitAttributes)
HitAttributeIdx = Idx++;
break;
case Intersection:
break;
default:
IGC_ASSERT_MESSAGE(0, "unknown func type!");
break;
}
}
ArgQuery::ArgQuery(const Function &F, const CodeGenContext &Ctx) {
auto *MMD = Ctx.getModuleMetaData();
auto &FuncMD = MMD->FuncMD;
auto I = FuncMD.find(const_cast<Function *>(&F));
IGC_ASSERT_MESSAGE(I != FuncMD.end(), "Missing metadata?");
auto &FMD = I->second;
init(FMD.rtInfo.callableShaderType, FMD);
}
ArgQuery::ArgQuery(const FunctionMetaData &FMD) { init(FMD.rtInfo.callableShaderType, FMD); }
ArgQuery::ArgQuery(CallableShaderTypeMD FuncType, const FunctionMetaData &FMD) { init(FuncType, FMD); }
Argument *ArgQuery::getPayloadArg(const Function *F) const {
return const_cast<Argument *>(getArg(F, getPayloadArgNo()));
}
Argument *ArgQuery::getHitAttribArg(const Function *F) const {
return const_cast<Argument *>(getArg(F, getHitAttribArgNo()));
}
std::optional<uint32_t> ArgQuery::getPayloadArgNo() const {
if (ShaderTy == Callable)
return CallableShaderPayloadIdx;
else
return TraceRayPayloadIdx;
return std::nullopt;
}
const Argument *ArgQuery::getArg(const Function *F, std::optional<uint32_t> ArgNo) const {
// Not specified
if (!ArgNo)
return nullptr;
auto *Arg = F->arg_begin();
if (F->arg_size() <= *ArgNo)
return nullptr;
std::advance(Arg, *ArgNo);
return Arg;
}
std::optional<uint32_t> ArgQuery::getHitAttribArgNo() const { return HitAttributeIdx; }
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