LLVM  10.0.0svn
LowerExpectIntrinsic.h
Go to the documentation of this file.
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.
32 };
33 
34 }
35 
36 #endif
This class represents lattice values for constants.
Definition: AllocatorList.h:23
F(f)
PreservedAnalyses run(Function &F, FunctionAnalysisManager &)
Run the pass over the function.
A CRTP mix-in to automatically provide informational APIs needed for passes.
Definition: PassManager.h:372
A set of analyses that are preserved following a run of a transformation pass.
Definition: PassManager.h:153
A container for analyses that lazily runs them and caches their results.
This header defines various interfaces for pass management in LLVM.