e7cd42f8e4
Create a global constructor which will initialize a global table of function pointers. For now, this is only used as a reduction technique for llvm-reduce. In the future this may be useful to support ifunc on systems where the program loader doesn't natively support it.
28 lines
979 B
C++
28 lines
979 B
C++
//===- LowerIFunc.cpp -----------------------------------------------------===//
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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 replacing calls to ifuncs by introducing indirect calls.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/Utils/LowerIFunc.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Pass.h"
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#include "llvm/Transforms/Utils/ModuleUtils.h"
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using namespace llvm;
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/// Replace all call users of ifuncs in the module.
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PreservedAnalyses LowerIFuncPass::run(Module &M, ModuleAnalysisManager &AM) {
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if (M.ifunc_empty())
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return PreservedAnalyses::all();
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lowerGlobalIFuncUsersAsGlobalCtor(M, {});
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return PreservedAnalyses::none();
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}
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