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📄 AlwaysInliner.cpp(6.51 KB)
📄 ArgumentPromotion.cpp(44.76 KB)
📄 Attributor.cpp(81.04 KB)
📄 AttributorAttributes.cpp(269.7 KB)
📄 BarrierNoopPass.cpp(1.67 KB)
📄 BlockExtractor.cpp(8.17 KB)
📄 CalledValuePropagation.cpp(17.71 KB)
📄 ConstantMerge.cpp(9.59 KB)
📄 CrossDSOCFI.cpp(5.98 KB)
📄 DeadArgumentElimination.cpp(42.84 KB)
📄 ElimAvailExtern.cpp(3.14 KB)
📄 ExtractGV.cpp(5.2 KB)
📄 ForceFunctionAttrs.cpp(4.79 KB)
📄 FunctionAttrs.cpp(55.56 KB)
📄 FunctionImport.cpp(55.28 KB)
📄 GlobalDCE.cpp(15.55 KB)
📄 GlobalOpt.cpp(119.78 KB)
📄 GlobalSplit.cpp(6.92 KB)
📄 HotColdSplitting.cpp(26.27 KB)
📄 IPConstantPropagation.cpp(10.68 KB)
📄 IPO.cpp(4.94 KB)
📄 InferFunctionAttrs.cpp(2.89 KB)
📄 InlineSimple.cpp(4.21 KB)
📄 Inliner.cpp(44.77 KB)
📄 Internalize.cpp(9.52 KB)
📄 LoopExtractor.cpp(7.14 KB)
📄 LowerTypeTests.cpp(83.98 KB)
📄 MergeFunctions.cpp(34.12 KB)
📄 OpenMPOpt.cpp(52.75 KB)
📄 PartialInlining.cpp(55.67 KB)
📄 PassManagerBuilder.cpp(49.21 KB)
📄 PruneEH.cpp(9.54 KB)
📄 SCCP.cpp(3.22 KB)
📄 SampleProfile.cpp(77.15 KB)
📄 StripDeadPrototypes.cpp(2.73 KB)
📄 StripSymbols.cpp(11.7 KB)
📄 SyntheticCountsPropagation.cpp(5.64 KB)
📄 ThinLTOBitcodeWriter.cpp(20.16 KB)
📄 WholeProgramDevirt.cpp(85.02 KB)

Editing: InferFunctionAttrs.cpp

//===- InferFunctionAttrs.cpp - Infer implicit function attributes --------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "llvm/Transforms/IPO/InferFunctionAttrs.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/InitializePasses.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/BuildLibCalls.h"
using namespace llvm;

#define DEBUG_TYPE "inferattrs"

static bool inferAllPrototypeAttributes(
    Module &M, function_ref<TargetLibraryInfo &(Function &)> GetTLI) {
  bool Changed = false;

for (Function &F : M.functions())
    // We only infer things using the prototype and the name; we don't need
    // definitions.
    if (F.isDeclaration() && !F.hasOptNone())
      Changed |= inferLibFuncAttributes(F, GetTLI(F));

return Changed;
}

PreservedAnalyses InferFunctionAttrsPass::run(Module &M,
                                              ModuleAnalysisManager &AM) {
  FunctionAnalysisManager &FAM =
      AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
  auto GetTLI = [&FAM](Function &F) -> TargetLibraryInfo & {
    return FAM.getResult<TargetLibraryAnalysis>(F);
  };

if (!inferAllPrototypeAttributes(M, GetTLI))
    // If we didn't infer anything, preserve all analyses.
    return PreservedAnalyses::all();

// Otherwise, we may have changed fundamental function attributes, so clear
  // out all the passes.
  return PreservedAnalyses::none();
}

namespace {
struct InferFunctionAttrsLegacyPass : public ModulePass {
  static char ID; // Pass identification, replacement for typeid
  InferFunctionAttrsLegacyPass() : ModulePass(ID) {
    initializeInferFunctionAttrsLegacyPassPass(
        *PassRegistry::getPassRegistry());
  }

void getAnalysisUsage(AnalysisUsage &AU) const override {
    AU.addRequired<TargetLibraryInfoWrapperPass>();
  }

bool runOnModule(Module &M) override {
    if (skipModule(M))
      return false;

auto GetTLI = [this](Function &F) -> TargetLibraryInfo & {
      return this->getAnalysis<TargetLibraryInfoWrapperPass>().getTLI(F);
    };
    return inferAllPrototypeAttributes(M, GetTLI);
  }
};
}

char InferFunctionAttrsLegacyPass::ID = 0;
INITIALIZE_PASS_BEGIN(InferFunctionAttrsLegacyPass, "inferattrs",
                      "Infer set function attributes", false, false)
INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
INITIALIZE_PASS_END(InferFunctionAttrsLegacyPass, "inferattrs",
                    "Infer set function attributes", false, false)

Pass *llvm::createInferFunctionAttrsLegacyPass() {
  return new InferFunctionAttrsLegacyPass();
}

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Editing: InferFunctionAttrs.cpp

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