64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
//===- ReduceGlobalValues.cpp - Specialized Delta Pass --------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a function which calls the Generic Delta pass to reduce
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// global value attributes/specifiers.
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//
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//===----------------------------------------------------------------------===//
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#include "ReduceGlobalValues.h"
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#include "llvm/IR/GlobalValue.h"
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using namespace llvm;
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static bool shouldReduceDSOLocal(GlobalValue &GV) {
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return GV.isDSOLocal() && !GV.isImplicitDSOLocal();
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}
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static bool shouldReduceVisibility(GlobalValue &GV) {
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return GV.getVisibility() != GlobalValue::VisibilityTypes::DefaultVisibility;
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}
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static bool shouldReduceUnnamedAddress(GlobalValue &GV) {
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return GV.getUnnamedAddr() != GlobalValue::UnnamedAddr::None;
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}
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static bool shouldReduceDLLStorageClass(GlobalValue &GV) {
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return GV.getDLLStorageClass() !=
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GlobalValue::DLLStorageClassTypes::DefaultStorageClass;
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}
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static bool shouldReduceThreadLocal(GlobalValue &GV) {
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return GV.isThreadLocal();
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}
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static void reduceGVs(Oracle &O, Module &Program) {
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for (auto &GV : Program.global_values()) {
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if (shouldReduceDSOLocal(GV) && !O.shouldKeep())
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GV.setDSOLocal(false);
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if (shouldReduceVisibility(GV) && !O.shouldKeep()) {
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bool IsImplicitDSOLocal = GV.isImplicitDSOLocal();
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GV.setVisibility(GlobalValue::VisibilityTypes::DefaultVisibility);
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if (IsImplicitDSOLocal)
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GV.setDSOLocal(false);
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}
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if (shouldReduceUnnamedAddress(GV) && !O.shouldKeep())
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GV.setUnnamedAddr(GlobalValue::UnnamedAddr::None);
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if (shouldReduceDLLStorageClass(GV) && !O.shouldKeep())
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GV.setDLLStorageClass(
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GlobalValue::DLLStorageClassTypes::DefaultStorageClass);
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if (shouldReduceThreadLocal(GV) && !O.shouldKeep())
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GV.setThreadLocal(false);
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}
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}
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void llvm::reduceGlobalValuesDeltaPass(TestRunner &Test) {
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outs() << "*** Reducing GlobalValues...\n";
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runDeltaPass(Test, reduceGVs);
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}
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