1//===- ADCE.h - Aggressive dead code elimination ----------------*- C++ -*-===//
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 provides the interface for the Aggressive Dead Code Elimination
10// pass. This pass optimistically assumes that all instructions are dead until
11// proven otherwise, allowing it to eliminate dead computations that other DCE
12// passes do not catch, particularly involving loop computations.
13//
14//===----------------------------------------------------------------------===//
15
16#ifndef LLVM_TRANSFORMS_SCALAR_ADCE_H
17#define LLVM_TRANSFORMS_SCALAR_ADCE_H
18
19#include "llvm/IR/PassManager.h"
20
21namespace llvm {
22
23class Function;
24
25/// A DCE pass that assumes instructions are dead until proven otherwise.
26///
27/// This pass eliminates dead code by optimistically assuming that all
28/// instructions are dead until proven otherwise. This allows it to eliminate
29/// dead computations that other DCE passes do not catch, particularly involving
30/// loop computations.
31struct ADCEPass : PassInfoMixin<ADCEPass> {
32 PreservedAnalyses run(Function &F, FunctionAnalysisManager &);
33};
34
35} // end namespace llvm
36
37#endif // LLVM_TRANSFORMS_SCALAR_ADCE_H
38