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