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/*========================== begin_copyright_notice ============================
Copyright (C) 2020-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "RTBuilder.h"
#include "common/LLVMUtils.h"
#include "Compiler/IGCPassSupport.h"
#include "AdaptorCommon/ImplicitArgs.hpp"
#include "Compiler/MetaDataUtilsWrapper.h"
#include "common/LLVMWarningsPush.hpp"
#include "llvm/IR/InstVisitor.h"
#include "common/LLVMWarningsPop.hpp"
using namespace IGC;
using namespace llvm;
//////////////////////////////////////////////////////////////////////////
//
// Pass replace printBuffer with RayDispatchGlobalData::printfBufferBasePtr
// Note this is different with OCL where implicitArgument printBuffer is to hold this ptr.
// which means, OCL's printBuffer is in EU payload, but RT's one is in memory and needs to be loaded with kernel.
class RayTracingPrintfPostProcess : public FunctionPass, public InstVisitor<RayTracingPrintfPostProcess>
{
public:
RayTracingPrintfPostProcess();
bool runOnFunction(Function& F) override;
StringRef getPassName() const override
{
return "RayTracingPrintfPostProcess";
}
virtual void getAnalysisUsage(llvm::AnalysisUsage& AU) const override
{
AU.addRequired<MetaDataUtilsWrapper>();
AU.addRequired<CodeGenContextWrapper>();
}
static char ID;
};
#define PASS_FLAG "raytracing-printf-postprocess"
#define PASS_DESCRIPTION "Replace printfBuffer with printfBufferBasePtr"
#define PASS_CFG_ONLY false
#define PASS_ANALYSIS false
IGC_INITIALIZE_PASS_BEGIN(RayTracingPrintfPostProcess, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
IGC_INITIALIZE_PASS_DEPENDENCY(MetaDataUtilsWrapper)
IGC_INITIALIZE_PASS_END(RayTracingPrintfPostProcess, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
RayTracingPrintfPostProcess::RayTracingPrintfPostProcess() : FunctionPass(ID) {
initializeRayTracingPrintfPostProcessPass(*PassRegistry::getPassRegistry());
}
char RayTracingPrintfPostProcess::ID = 0;
bool RayTracingPrintfPostProcess::runOnFunction(Function& F)
{
RayDispatchShaderContext* ctx = static_cast<RayDispatchShaderContext*>(
getAnalysis<CodeGenContextWrapper>().getCodeGenContext());
RTBuilder builder(&F.getEntryBlock(), *ctx);
auto* pMdUtils = getAnalysis<MetaDataUtilsWrapper>().getMetaDataUtils();
if (pMdUtils->findFunctionsInfoItem(&F) == pMdUtils->end_FunctionsInfo())
return false;
ImplicitArgs implicitArgs(F, pMdUtils);
unsigned numImplicitArgs = implicitArgs.size();
IGC_ASSERT_MESSAGE(F.arg_size() >= numImplicitArgs, "Function arg size does not match meta data args.");
llvm::Function::arg_iterator arg = F.arg_begin() + (F.arg_size() - numImplicitArgs);
for (unsigned i = 0; i < numImplicitArgs; ++i, ++arg) {
ImplicitArg implictArg = implicitArgs[i];
if (implictArg.getArgType() == ImplicitArg::PRINTF_BUFFER) {
if (F.begin()->empty())
{
builder.SetInsertPoint(&*F.begin());
}
else
{
builder.SetInsertPoint(&*F.begin()->begin());
}
llvm::Value* printfBufferPtr = builder.getPrintfBufferBasePtr();
printfBufferPtr = builder.CreateIntToPtr(
printfBufferPtr, arg->getType(), VALUE_NAME("printfBufferBasePtr"));
arg->replaceAllUsesWith(printfBufferPtr);
return true;
}
}
return false;
}
namespace IGC
{
Pass* createRayTracingPrintfPostProcessPass()
{
return new RayTracingPrintfPostProcess();
}
}
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