58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
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//===- 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 "llvm/IR/GlobalValue.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
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extractFunctionBodiesFromModule(const std::vector<Chunk> &ChunksToKeep,
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Module *Program) {
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Oracle O(ChunksToKeep);
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// Delete out-of-chunk function bodies
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std::vector<Function *> FuncDefsToReduce;
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for (auto &F : *Program)
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if (!F.isDeclaration() && !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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/// Counts the amount of non-declaration functions and prints their
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/// respective name & index
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static int countFunctionDefinitions(Module *Program) {
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// TODO: Silence index with --quiet flag
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errs() << "----------------------------\n";
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errs() << "Function Definition Index Reference:\n";
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int FunctionDefinitionCount = 0;
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for (auto &F : *Program)
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if (!F.isDeclaration())
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errs() << "\t" << ++FunctionDefinitionCount << ": " << F.getName()
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<< "\n";
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errs() << "----------------------------\n";
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return FunctionDefinitionCount;
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}
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void llvm::reduceFunctionBodiesDeltaPass(TestRunner &Test) {
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errs() << "*** Reducing Function Bodies...\n";
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int Functions = countFunctionDefinitions(Test.getProgram());
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runDeltaPass(Test, Functions, extractFunctionBodiesFromModule);
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errs() << "----------------------------\n";
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}
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