62 lines
2 KiB
C++
62 lines
2 KiB
C++
//===- ReduceFunctions.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 in order
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// to reduce function bodies in the provided Module.
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//
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//===----------------------------------------------------------------------===//
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#include "ReduceFunctionBodies.h"
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#include "Delta.h"
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#include "Utils.h"
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#include "llvm/IR/GlobalValue.h"
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#include "llvm/IR/Instructions.h"
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using namespace llvm;
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/// Removes all the bodies of defined functions that aren't inside any of the
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/// desired Chunks.
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static void extractFunctionBodiesFromModule(Oracle &O,
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ReducerWorkItem &WorkItem) {
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// Delete out-of-chunk function bodies
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for (auto &F : WorkItem.getModule()) {
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if (!F.isDeclaration() && !hasAliasUse(F) && !O.shouldKeep()) {
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F.deleteBody();
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F.setComdat(nullptr);
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}
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}
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}
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void llvm::reduceFunctionBodiesDeltaPass(TestRunner &Test) {
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runDeltaPass(Test, extractFunctionBodiesFromModule,
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"Reducing Function Bodies");
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}
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static void reduceFunctionData(Oracle &O, ReducerWorkItem &WorkItem) {
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for (Function &F : WorkItem.getModule()) {
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if (F.hasPersonalityFn()) {
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if (none_of(F,
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[](const BasicBlock &BB) {
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return BB.isEHPad() || isa<ResumeInst>(BB.getTerminator());
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}) &&
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!O.shouldKeep()) {
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F.setPersonalityFn(nullptr);
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}
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}
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if (F.hasPrefixData() && !O.shouldKeep())
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F.setPrefixData(nullptr);
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if (F.hasPrologueData() && !O.shouldKeep())
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F.setPrologueData(nullptr);
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}
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}
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void llvm::reduceFunctionDataDeltaPass(TestRunner &Test) {
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runDeltaPass(Test, reduceFunctionData, "Reducing Function Data");
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}
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