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/*========================== begin_copyright_notice ============================
Copyright (C) 2023 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
//===----------------------------------------------------------------------===//
///
/// Override raytracing TMax value for testing purposes.
///
//===----------------------------------------------------------------------===//
#include "Compiler/IGCPassSupport.h"
#include "GenISAIntrinsics/GenIntrinsicInst.h"
#include "GenISAIntrinsics/GenIntrinsics.h"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/IR/InstIterator.h>
#include "common/LLVMWarningsPop.hpp"
using namespace IGC;
using namespace llvm;
class OverrideTMaxPass : public FunctionPass {
public:
OverrideTMaxPass(uint32_t OverrideValue = 0) : OverrideValue(OverrideValue), FunctionPass(ID) {
initializeOverrideTMaxPassPass(*PassRegistry::getPassRegistry());
}
void getAnalysisUsage(llvm::AnalysisUsage &AU) const override { AU.setPreservesCFG(); }
bool runOnFunction(Function &F) override;
StringRef getPassName() const override { return "OverrideTMaxPass"; }
static char ID;
private:
uint32_t OverrideValue = 0;
};
char OverrideTMaxPass::ID = 0;
// Register pass to igc-opt
#define PASS_FLAG1 "override-tmax"
#define PASS_DESCRIPTION1 "override tmax for testing purposes"
#define PASS_CFG_ONLY1 false
#define PASS_ANALYSIS1 false
IGC_INITIALIZE_PASS_BEGIN(OverrideTMaxPass, PASS_FLAG1, PASS_DESCRIPTION1, PASS_CFG_ONLY1, PASS_ANALYSIS1)
IGC_INITIALIZE_PASS_END(OverrideTMaxPass, PASS_FLAG1, PASS_DESCRIPTION1, PASS_CFG_ONLY1, PASS_ANALYSIS1)
bool OverrideTMaxPass::runOnFunction(Function &F) {
if (OverrideValue == 0)
return false;
IRBuilder<> IRB(F.getContext());
auto updateTMax = [&](auto *GII) {
auto *Val = ConstantFP::get(IRB.getFloatTy(), static_cast<double>(OverrideValue));
GII->setTMax(Val);
return true;
};
bool Changed = false;
for (auto &I : instructions(F)) {
auto *GII = dyn_cast<GenIntrinsicInst>(&I);
if (!GII)
continue;
switch (GII->getIntrinsicID()) {
case GenISAIntrinsic::GenISA_TraceRayInlineHL:
Changed |= updateTMax(cast<TraceRayInlineHLIntrinsic>(GII));
break;
default:
break;
}
}
return Changed;
}
namespace IGC {
Pass *createOverrideTMaxPass(uint32_t OverrideValue) { return new OverrideTMaxPass(OverrideValue); }
} // namespace IGC
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