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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/GlobalValue.h"
using namespace llvm;
static bool shouldReduceDSOLocal(GlobalValue &GV) {
return GV.isDSOLocal() && !GV.isImplicitDSOLocal();
}
static bool shouldReduceVisibility(GlobalValue &GV) {
return GV.getVisibility() != GlobalValue::VisibilityTypes::DefaultVisibility;
}
static bool shouldReduceUnnamedAddress(GlobalValue &GV) {
return GV.getUnnamedAddr() != GlobalValue::UnnamedAddr::None;
}
static bool shouldReduceDLLStorageClass(GlobalValue &GV) {
return GV.getDLLStorageClass() !=
GlobalValue::DLLStorageClassTypes::DefaultStorageClass;
}
static bool shouldReduceThreadLocal(GlobalValue &GV) {
return GV.isThreadLocal();
}
static bool shouldReduceLinkage(GlobalValue &GV) {
return !GV.hasExternalLinkage();
}
static void reduceGVs(Oracle &O, ReducerWorkItem &Program) {
for (auto &GV : Program.getModule().global_values()) {
if (shouldReduceDSOLocal(GV) && !O.shouldKeep())
GV.setDSOLocal(false);
if (shouldReduceVisibility(GV) && !O.shouldKeep()) {
bool IsImplicitDSOLocal = GV.isImplicitDSOLocal();
GV.setVisibility(GlobalValue::VisibilityTypes::DefaultVisibility);
if (IsImplicitDSOLocal)
GV.setDSOLocal(false);
}
if (shouldReduceUnnamedAddress(GV) && !O.shouldKeep())
GV.setUnnamedAddr(GlobalValue::UnnamedAddr::None);
if (shouldReduceDLLStorageClass(GV) && !O.shouldKeep())
GV.setDLLStorageClass(
GlobalValue::DLLStorageClassTypes::DefaultStorageClass);
if (shouldReduceThreadLocal(GV) && !O.shouldKeep())
GV.setThreadLocal(false);
if (shouldReduceLinkage(GV) && !O.shouldKeep()) {
bool IsImplicitDSOLocal = GV.isImplicitDSOLocal();
GV.setLinkage(GlobalValue::ExternalLinkage);
if (IsImplicitDSOLocal)
GV.setDSOLocal(false);
}
}
}
void llvm::reduceGlobalValuesDeltaPass(TestRunner &Test) {
runDeltaPass(Test, reduceGVs, "Reducing GlobalValues");
}
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