| //=- CFLAliasAnalysisUtils.h - Utilities for CFL Alias Analysis ----*- C++-*-=// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // \file |
| // These are the utilities/helpers used by the CFL Alias Analyses available in |
| // tree, i.e. Steensgaard's and Andersens'. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_ANALYSIS_CFLALIASANALYSISUTILS_H |
| #define LLVM_ANALYSIS_CFLALIASANALYSISUTILS_H |
| |
| #include "llvm/IR/Function.h" |
| #include "llvm/IR/ValueHandle.h" |
| |
| namespace llvm { |
| namespace cflaa { |
| |
| template <typename AAResult> struct FunctionHandle final : public CallbackVH { |
| FunctionHandle(Function *Fn, AAResult *Result) |
| : CallbackVH(Fn), Result(Result) { |
| assert(Fn != nullptr); |
| assert(Result != nullptr); |
| } |
| |
| void deleted() override { removeSelfFromCache(); } |
| void allUsesReplacedWith(Value *) override { removeSelfFromCache(); } |
| |
| private: |
| AAResult *Result; |
| |
| void removeSelfFromCache() { |
| assert(Result != nullptr); |
| auto *Val = getValPtr(); |
| Result->evict(cast<Function>(Val)); |
| setValPtr(nullptr); |
| } |
| }; |
| |
| static inline const Function *parentFunctionOfValue(const Value *Val) { |
| if (auto *Inst = dyn_cast<Instruction>(Val)) { |
| auto *Bb = Inst->getParent(); |
| return Bb->getParent(); |
| } |
| |
| if (auto *Arg = dyn_cast<Argument>(Val)) |
| return Arg->getParent(); |
| return nullptr; |
| } // namespace cflaa |
| } // namespace llvm |
| } |
| |
| #endif // LLVM_ANALYSIS_CFLALIASANALYSISUTILS_H |