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      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/Function.h"
     19 #include "llvm/IR/PassManager.h"
     20 
     21 namespace llvm {
     22 
     23 struct LowerExpectIntrinsicPass : PassInfoMixin<LowerExpectIntrinsicPass> {
     24   /// Run the pass over the function.
     25   ///
     26   /// This will lower all of the expect intrinsic calls in this function into
     27   /// branch weight metadata. That metadata will subsequently feed the analysis
     28   /// of the probabilities and frequencies of the CFG. After running this pass,
     29   /// no more expect intrinsics remain, allowing the rest of the optimizer to
     30   /// ignore them.
     31   PreservedAnalyses run(Function &F, FunctionAnalysisManager &);
     32 };
     33 
     34 }
     35 
     36 #endif
     37