LLVM  14.0.0git
UnifyFunctionExitNodes.h
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1 //===-- UnifyFunctionExitNodes.h - Ensure fn's have one return --*- 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 //
9 // This pass is used to ensure that functions have at most one return and one
10 // unreachable instruction in them.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_TRANSFORMS_UTILS_UNIFYFUNCTIONEXITNODES_H
15 #define LLVM_TRANSFORMS_UTILS_UNIFYFUNCTIONEXITNODES_H
16 
17 #include "llvm/IR/PassManager.h"
18 #include "llvm/Pass.h"
19 
20 namespace llvm {
21 
22 class BasicBlock;
23 
25 public:
26  static char ID; // Pass identification, replacement for typeid
28 
29  // We can preserve non-critical-edgeness when we unify function exit nodes
30  void getAnalysisUsage(AnalysisUsage &AU) const override;
31 
32  bool runOnFunction(Function &F) override;
33 };
34 
36 
38  : public PassInfoMixin<UnifyFunctionExitNodesPass> {
39 public:
41 };
42 
43 } // end namespace llvm
44 
45 #endif // LLVM_TRANSFORMS_UTILS_UNIFYFUNCTIONEXITNODES_H
llvm::PreservedAnalyses
A set of analyses that are preserved following a run of a transformation pass.
Definition: PassManager.h:155
llvm
This file implements support for optimizing divisions by a constant.
Definition: AllocatorList.h:23
llvm::PassInfoMixin
A CRTP mix-in to automatically provide informational APIs needed for passes.
Definition: PassManager.h:374
llvm::Function
Definition: Function.h:62
llvm::UnifyFunctionExitNodesPass
Definition: UnifyFunctionExitNodes.h:37
Pass.h
llvm::UnifyFunctionExitNodesLegacyPass::runOnFunction
bool runOnFunction(Function &F) override
runOnFunction - Virtual method overriden by subclasses to do the per-function processing of the pass.
Definition: UnifyFunctionExitNodes.cpp:116
F
#define F(x, y, z)
Definition: MD5.cpp:56
llvm::UnifyFunctionExitNodesLegacyPass::UnifyFunctionExitNodesLegacyPass
UnifyFunctionExitNodesLegacyPass()
Definition: UnifyFunctionExitNodes.cpp:25
llvm::AnalysisUsage
Represent the analysis usage information of a pass.
Definition: PassAnalysisSupport.h:47
llvm::UnifyFunctionExitNodesLegacyPass
Definition: UnifyFunctionExitNodes.h:24
llvm::ISD::BasicBlock
@ BasicBlock
Various leaf nodes.
Definition: ISDOpcodes.h:71
llvm::UnifyFunctionExitNodesPass::run
PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM)
Definition: UnifyFunctionExitNodes.cpp:123
llvm::createUnifyFunctionExitNodesPass
Pass * createUnifyFunctionExitNodesPass()
PassManager.h
llvm::Pass
Pass interface - Implemented by all 'passes'.
Definition: Pass.h:91
llvm::UnifyFunctionExitNodesLegacyPass::getAnalysisUsage
void getAnalysisUsage(AnalysisUsage &AU) const override
getAnalysisUsage - This function should be overriden by passes that need analysis information to do t...
Definition: UnifyFunctionExitNodes.cpp:38
llvm::AnalysisManager
A container for analyses that lazily runs them and caches their results.
Definition: InstructionSimplify.h:44
llvm::FunctionPass
FunctionPass class - This class is used to implement most global optimizations.
Definition: Pass.h:298
llvm::UnifyFunctionExitNodesLegacyPass::ID
static char ID
Definition: UnifyFunctionExitNodes.h:26