1 //===- SimplifyInstructions.h - Remove redundant instructions ---*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This is a utility pass used for testing the InstructionSimplify analysis.
11 // The analysis is applied to every instruction, and if it simplifies then the
12 // instruction is replaced by the simplification.  If you are looking for a pass
13 // that performs serious instruction folding, use the instcombine pass instead.
14 //
15 //===----------------------------------------------------------------------===//
16 
17 #ifndef LLVM_TRANSFORMS_UTILS_SIMPLIFYINSTRUCTIONS_H
18 #define LLVM_TRANSFORMS_UTILS_SIMPLIFYINSTRUCTIONS_H
19 
20 #include "llvm/IR/PassManager.h"
21 
22 namespace llvm {
23 
24 /// This pass removes redundant instructions.
25 class InstSimplifierPass : public PassInfoMixin<InstSimplifierPass> {
26 public:
27   PreservedAnalyses run(Function &F, AnalysisManager<Function> &AM);
28 };
29 } // end namespace llvm
30 
31 #endif // LLVM_TRANSFORMS_UTILS_SIMPLIFYINSTRUCTIONS_H
32