| 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 | |
|---|
