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/*========================== begin_copyright_notice ============================
Copyright (C) 2019-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
//===----------------------------------------------------------------------===//
///
/// Replace specified raytracing intrinsics with implicit args.
///
//===----------------------------------------------------------------------===//
#include "IGC/common/StringMacros.hpp"
#include "RTBuilder.h"
#include "common/LLVMUtils.h"
#include "Compiler/IGCPassSupport.h"
#include "Compiler/CodeGenPublic.h"
#include "AdaptorCommon/ImplicitArgs.hpp"
#include "common/LLVMWarningsPush.hpp"
#include "llvm/IR/InstVisitor.h"
#include <llvm/IR/Function.h>
#include "common/LLVMWarningsPop.hpp"
using namespace IGC;
using namespace llvm;
//////////////////////////////////////////////////////////////////////////
//
// Now that we have implicit args, replace the intrinsics
class RayTracingIntrinsicResolution : public FunctionPass, public InstVisitor<RayTracingIntrinsicResolution>
{
public:
RayTracingIntrinsicResolution();
bool runOnFunction(Function &F) override;
StringRef getPassName() const override
{
return "RayTracingIntrinsicResolution";
}
virtual void getAnalysisUsage(llvm::AnalysisUsage &AU) const override
{
AU.addRequired<MetaDataUtilsWrapper>();
AU.addRequired<CodeGenContextWrapper>();
}
void visitCallInst(CallInst &CI);
static char ID;
private:
Argument* getImplicitArg(Function *F, ImplicitArg::ArgType argType);
private:
ImplicitArgs m_implicitArgs;
bool Changed;
CodeGenContext* m_CGCtx = nullptr;
};
#define PASS_FLAG "raytracing-intrinsic-resolution"
#define PASS_DESCRIPTION "replace intrinsics with implicit args"
#define PASS_CFG_ONLY false
#define PASS_ANALYSIS false
IGC_INITIALIZE_PASS_BEGIN(RayTracingIntrinsicResolution, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
IGC_INITIALIZE_PASS_DEPENDENCY(MetaDataUtilsWrapper)
IGC_INITIALIZE_PASS_END(RayTracingIntrinsicResolution, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
Argument* RayTracingIntrinsicResolution::getImplicitArg(
Function *F, ImplicitArg::ArgType argType)
{
return m_implicitArgs.getImplicitArg(*F, argType);
}
RayTracingIntrinsicResolution::RayTracingIntrinsicResolution() : FunctionPass(ID) {
initializeRayTracingIntrinsicResolutionPass(*PassRegistry::getPassRegistry());
}
char RayTracingIntrinsicResolution::ID = 0;
void RayTracingIntrinsicResolution::visitCallInst(CallInst &CI)
{
Value *Arg = nullptr;
Function *F = CI.getFunction();
if (auto *GII = dyn_cast<GenIntrinsicInst>(&CI))
{
switch (GII->getIntrinsicID())
{
case GenISAIntrinsic::GenISA_GlobalBufferPointer:
Arg = getImplicitArg(F, ImplicitArg::RT_GLOBAL_BUFFER_POINTER);
break;
case GenISAIntrinsic::GenISA_LocalBufferPointer:
Arg = getImplicitArg(F, ImplicitArg::RT_LOCAL_BUFFER_POINTER);
break;
case GenISAIntrinsic::GenISA_AsyncStackID:
Arg = getImplicitArg(F, ImplicitArg::RT_STACK_ID);
break;
case GenISAIntrinsic::GenISA_InlinedData:
{
// the global and local pointer are both passed in so the argument
// is a vector of two pointers.
Arg = getImplicitArg(F, ImplicitArg::RT_INLINED_DATA);
IRBuilder<> IRB(&CI);
Arg = IRB.CreateExtractElement(Arg, CI.getOperand(0));
break;
}
default:
break;
}
}
if (!Arg)
return;
IRBuilder<> IRB(&CI);
Arg = IRB.CreateBitCast(Arg, CI.getType());
CI.replaceAllUsesWith(Arg);
CI.eraseFromParent();
Changed = true;
}
bool RayTracingIntrinsicResolution::runOnFunction(Function &F)
{
auto *pMdUtils = getAnalysis<MetaDataUtilsWrapper>().getMetaDataUtils();
m_CGCtx = getAnalysis<CodeGenContextWrapper>().getCodeGenContext();
if (pMdUtils->findFunctionsInfoItem(&F) == pMdUtils->end_FunctionsInfo())
return false;
Changed = false;
m_implicitArgs = ImplicitArgs(
F,
pMdUtils);
visit(F);
return Changed;
}
namespace IGC
{
Pass* createRayTracingIntrinsicResolutionPass()
{
return new RayTracingIntrinsicResolution();
}
}
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