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 | |
21 | namespace llvm { |
22 | |
23 | class 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. |
31 | struct ADCEPass : PassInfoMixin<ADCEPass> { |
32 | PreservedAnalyses run(Function &F, FunctionAnalysisManager &); |
33 | }; |
34 | |
35 | } // end namespace llvm |
36 | |
37 | #endif // LLVM_TRANSFORMS_SCALAR_ADCE_H |
38 | |