54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
|
//===- 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, ReducerWorkItem &WorkItem) {
|
||
|
|
Module &Mod = WorkItem.getModule();
|
||
|
|
|
||
|
|
std::vector<GlobalIFunc *> IFuncs;
|
||
|
|
for (GlobalIFunc &GI : Mod.ifuncs()) {
|
||
|
|
if (!O.shouldKeep())
|
||
|
|
IFuncs.push_back(&GI);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!IFuncs.empty())
|
||
|
|
lowerGlobalIFuncUsersAsGlobalCtor(Mod, IFuncs);
|
||
|
|
}
|
||
|
|
|
||
|
|
void llvm::reduceAliasesDeltaPass(TestRunner &Test) {
|
||
|
|
runDeltaPass(Test, extractAliasesFromModule, "Reducing Aliases");
|
||
|
|
}
|
||
|
|
|
||
|
|
void llvm::reduceIFuncsDeltaPass(TestRunner &Test) {
|
||
|
|
runDeltaPass(Test, extractIFuncsFromModule, "Reducing Ifuncs");
|
||
|
|
}
|