1 //===- LowerConstantIntrinsics.h - Lower constant int. pass -*- 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 /// \file
9 ///
10 /// The header file for the LowerConstantIntrinsics pass as used by the new pass
11 /// manager.
12 ///
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_TRANSFORMS_SCALAR_LOWERCONSTANTINTRINSICS_H
16 #define LLVM_TRANSFORMS_SCALAR_LOWERCONSTANTINTRINSICS_H
17 
18 #include "llvm/IR/PassManager.h"
19 
20 namespace llvm {
21 
22 class Function;
23 
24 struct LowerConstantIntrinsicsPass :
25     PassInfoMixin<LowerConstantIntrinsicsPass> {
26 public:
27   explicit LowerConstantIntrinsicsPass() = default;
28 
29   /// Run the pass over the function.
30   ///
31   /// This will lower all remaining 'objectsize' and 'is.constant'`
32   /// intrinsic calls in this function, even when the argument has no known
33   /// size or is not a constant respectively. The resulting constant is
34   /// propagated and conditional branches are resolved where possible.
35   /// This complements the Instruction Simplification and
36   /// Instruction Combination passes of the optimized pass chain.
37   PreservedAnalyses run(Function &F, FunctionAnalysisManager &);
38 };
39 
40 }
41 
42 #endif
43