LLVM 17.0.0git
SimplifyCFG.h
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1//===- SimplifyCFG.h - Simplify and canonicalize the CFG --------*- 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/// This file provides the interface for the pass responsible for both
10/// simplifying and canonicalizing the CFG.
11///
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_TRANSFORMS_SCALAR_SIMPLIFYCFG_H
15#define LLVM_TRANSFORMS_SCALAR_SIMPLIFYCFG_H
16
17#include "llvm/IR/Function.h"
18#include "llvm/IR/PassManager.h"
20
21namespace llvm {
22
23/// A pass to simplify and canonicalize the CFG of a function.
24///
25/// This pass iteratively simplifies the entire CFG of a function. It may change
26/// or remove control flow to put the CFG into a canonical form expected by
27/// other passes of the mid-level optimizer. Depending on the specified options,
28/// it may further optimize control-flow to create non-canonical forms.
29class SimplifyCFGPass : public PassInfoMixin<SimplifyCFGPass> {
30 SimplifyCFGOptions Options;
31
32public:
33 /// The default constructor sets the pass options to create canonical IR,
34 /// rather than optimal IR. That is, by default we bypass transformations that
35 /// are likely to improve performance but make analysis for other passes more
36 /// difficult.
38
39 /// Construct a pass with optional optimizations.
40 SimplifyCFGPass(const SimplifyCFGOptions &PassOptions);
41
42 /// Run the pass over the function.
44
46 function_ref<StringRef(StringRef)> MapClassName2PassName);
47};
48
49}
50
51#endif
#define F(x, y, z)
Definition: MD5.cpp:55
This header defines various interfaces for pass management in LLVM.
A container for analyses that lazily runs them and caches their results.
Definition: PassManager.h:620
A set of analyses that are preserved following a run of a transformation pass.
Definition: PassManager.h:152
A pass to simplify and canonicalize the CFG of a function.
Definition: SimplifyCFG.h:29
PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM)
Run the pass over the function.
SimplifyCFGPass()
The default constructor sets the pass options to create canonical IR, rather than optimal IR.
void printPipeline(raw_ostream &OS, function_ref< StringRef(StringRef)> MapClassName2PassName)
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
An efficient, type-erasing, non-owning reference to a callable.
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
A CRTP mix-in to automatically provide informational APIs needed for passes.
Definition: PassManager.h:371