llvm/lib/Transforms/Utils/LowerIFunc.cpp

   1 //===- LowerIFunc.cpp -----------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file implements replacing calls to ifuncs by introducing indirect calls.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "llvm/Transforms/Utils/LowerIFunc.h"
  14 #include "llvm/IR/Module.h"
  15 #include "llvm/Pass.h"
  16 #include "llvm/Transforms/Utils/ModuleUtils.h"
  17
  18 using namespace llvm;
  19
  20 /// Replace all call users of ifuncs in the module.
  21 PreservedAnalyses LowerIFuncPass::run(Module &M, ModuleAnalysisManager &AM) {
  22   if (M.ifunc_empty())
  23     return PreservedAnalyses::all();
  24
  25   lowerGlobalIFuncUsersAsGlobalCtor(M, {});
  26   return PreservedAnalyses::none();
  27 }