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//===- ReduceAliases.cpp - Specialized Delta Pass -------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements a function which calls the Generic Delta pass in order
// to reduce aliases in the provided Module.
//
//===----------------------------------------------------------------------===//
#include "ReduceAliases.h"
#include "Delta.h"
#include "Utils.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/Transforms/Utils/ModuleUtils.h"
using namespace llvm;
/// Removes all aliases aren't inside any of the
/// desired Chunks.
static void extractAliasesFromModule(Oracle &O, ReducerWorkItem &Program) {
for (auto &GA : make_early_inc_range(Program.getModule().aliases())) {
if (!O.shouldKeep()) {
GA.replaceAllUsesWith(GA.getAliasee());
GA.eraseFromParent();
}
}
}
static void extractIFuncsFromModule(Oracle &O, Module &Program) {
std::vector<GlobalIFunc *> IFuncs;
for (GlobalIFunc &GI : Program.ifuncs()) {
if (!O.shouldKeep())
IFuncs.push_back(&GI);
}
if (!IFuncs.empty())
lowerGlobalIFuncUsersAsGlobalCtor(Program, IFuncs);
}
void llvm::reduceAliasesDeltaPass(TestRunner &Test) {
runDeltaPass(Test, extractAliasesFromModule, "Reducing Aliases");
}
void llvm::reduceIFuncsDeltaPass(TestRunner &Test) {
runDeltaPass(Test, extractIFuncsFromModule, "Reducing Ifuncs");
}
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