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/*========================== begin_copyright_notice ============================
Copyright (C) 2025 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "common/LLVMWarningsPush.hpp"
#include "llvmWrapper/Transforms/Scalar/ADCE.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Scalar/ADCE.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/PostDominators.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/PassManager.h"
#include "llvm/IR/Value.h"
#include "llvm/Pass.h"
#include "llvm/Passes/PassBuilder.h"
#include "llvm/Transforms/Scalar.h"
#include "llvmWrapper/Transforms/InitializePasses.h"
#include "common/LLVMWarningsPop.hpp"
#include "Compiler/IGCPassSupport.h"
using namespace llvm;
#if LLVM_VERSION_MAJOR >= 16
namespace IGCLLVM {
ADCELegacyPassWrapper::ADCELegacyPassWrapper() : FunctionPass(ID) {
initializeADCELegacyPassWrapperPass(*PassRegistry::getPassRegistry());
PB.registerFunctionAnalyses(FAM);
}
bool ADCELegacyPassWrapper::runOnFunction(Function &F) {
// The legacy pass manager implementation of the pass used to skip some functions. In the new pass manager
// implementation this is done globally through the pass manager. Check and skip explicitly here to preserve the old
// behavior.
if (skipFunction(F))
return false;
// Run the New Pass Manager implementation of the pass. Note, there is no need to inject any analyses for
// PostDominatorTree as ADCE does not actually use it but only "requires" it to mark it as preserved.
ADCEPass Implementation;
Implementation.run(F, FAM);
return true;
}
void ADCELegacyPassWrapper::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<PostDominatorTreeWrapperPass>();
}
char ADCELegacyPassWrapper::ID = 0;
} // namespace IGCLLVM
using namespace IGCLLVM;
#define PASS_FLAG "adce-legacy-wrapped"
#define PASS_DESCRIPTION "Aggressive Dead Code Elimination LPM Wrapped"
#define PASS_CFG_ONLY false
#define PASS_ANALYSIS false
IGC_INITIALIZE_PASS_BEGIN(ADCELegacyPassWrapper, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
IGC_INITIALIZE_PASS_DEPENDENCY(PostDominatorTreeWrapperPass)
IGC_INITIALIZE_PASS_END(ADCELegacyPassWrapper, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY, PASS_ANALYSIS)
#endif // LLVM_VERSION_MAJOR >= 16
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