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//===- ReduceGlobalValues.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 to reduce
// global value attributes/specifiers.
//
//===----------------------------------------------------------------------===//
#include "ReduceGlobalValues.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/GlobalValue.h"
using namespace llvm;
static bool isValidDSOLocalReductionGV(GlobalValue &GV) {
return GV.isDSOLocal() && !GV.isImplicitDSOLocal();
}
/// Sets dso_local to false for all global values.
static void extractGVsFromModule(std::vector<Chunk> ChunksToKeep,
Module *Program) {
Oracle O(ChunksToKeep);
// remove dso_local from global values
for (auto &GV : Program->global_values())
if (isValidDSOLocalReductionGV(GV) && !O.shouldKeep()) {
GV.setDSOLocal(false);
}
}
/// Counts the amount of global values with dso_local and displays their
/// respective name & index
static int countGVs(Module *Program) {
// TODO: Silence index with --quiet flag
outs() << "----------------------------\n";
outs() << "GlobalValue Index Reference:\n";
int GVCount = 0;
for (auto &GV : Program->global_values())
if (isValidDSOLocalReductionGV(GV))
outs() << "\t" << ++GVCount << ": " << GV.getName() << "\n";
outs() << "----------------------------\n";
return GVCount;
}
void llvm::reduceGlobalValuesDeltaPass(TestRunner &Test) {
outs() << "*** Reducing GlobalValues...\n";
int GVCount = countGVs(Test.getProgram());
runDeltaPass(Test, GVCount, extractGVsFromModule);
}
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