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