40 lines
1.4 KiB
C++
40 lines
1.4 KiB
C++
//===- LowerExpectIntrinsic.h - LowerExpectIntrinsic pass -------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
/// \file
|
|
///
|
|
/// The header file for the LowerExpectIntrinsic pass as used by the new pass
|
|
/// manager.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TRANSFORMS_SCALAR_LOWEREXPECTINTRINSIC_H
|
|
#define LLVM_TRANSFORMS_SCALAR_LOWEREXPECTINTRINSIC_H
|
|
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/PassManager.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
|
|
namespace llvm {
|
|
|
|
struct LowerExpectIntrinsicPass : PassInfoMixin<LowerExpectIntrinsicPass> {
|
|
/// Run the pass over the function.
|
|
///
|
|
/// This will lower all of the expect intrinsic calls in this function into
|
|
/// branch weight metadata. That metadata will subsequently feed the analysis
|
|
/// of the probabilities and frequencies of the CFG. After running this pass,
|
|
/// no more expect intrinsics remain, allowing the rest of the optimizer to
|
|
/// ignore them.
|
|
PreservedAnalyses run(Function &F, FunctionAnalysisManager &);
|
|
};
|
|
|
|
extern cl::opt<uint32_t> LikelyBranchWeight;
|
|
extern cl::opt<uint32_t> UnlikelyBranchWeight;
|
|
}
|
|
|
|
#endif
|