1 //===- LowerExpectIntrinsic.h - LowerExpectIntrinsic 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 LowerExpectIntrinsic pass as used by the new pass
11 /// manager.
12 ///
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_TRANSFORMS_SCALAR_LOWEREXPECTINTRINSIC_H
16 #define LLVM_TRANSFORMS_SCALAR_LOWEREXPECTINTRINSIC_H
17 
18 #include "llvm/IR/PassManager.h"
19 
20 namespace llvm {
21 
22 class Function;
23 
24 struct LowerExpectIntrinsicPass : PassInfoMixin<LowerExpectIntrinsicPass> {
25   /// Run the pass over the function.
26   ///
27   /// This will lower all of the expect intrinsic calls in this function into
28   /// branch weight metadata. That metadata will subsequently feed the analysis
29   /// of the probabilities and frequencies of the CFG. After running this pass,
30   /// no more expect intrinsics remain, allowing the rest of the optimizer to
31   /// ignore them.
32   PreservedAnalyses run(Function &F, FunctionAnalysisManager &);
33 };
34 
35 }
36 
37 #endif
38