1 //===- llvm/PassManager.h - Container for Passes ----------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the PassManager class. This class is used to hold,
11 // maintain, and optimize execution of Passes. The PassManager class ensures
12 // that analysis results are available before a pass runs, and that Pass's are
13 // destroyed when the PassManager is destroyed.
15 //===----------------------------------------------------------------------===//
17 #ifndef LLVM_PASSMANAGER_H
18 #define LLVM_PASSMANAGER_H
20 #include "llvm/Pass.h"
21 #include "llvm/Support/CBindingWrapping.h"
28 class PassManagerImpl;
29 class FunctionPassManagerImpl;
31 /// Called by tools to initialize globals and register options at a particular
32 /// point (before command line parsing). If this is not called, then PassManager
33 /// globals are lazily initialized at first use.
34 void initializePassManager();
36 /// PassManagerBase - An abstract interface to allow code to add passes to
37 /// a pass manager without having to hard-code what kind of pass manager
39 class PassManagerBase {
41 virtual ~PassManagerBase();
43 /// add - Add a pass to the queue of passes to run. This passes ownership of
44 /// the Pass to the PassManager. When the PassManager is destroyed, the pass
45 /// will be destroyed as well, so there is no need to delete the pass. This
46 /// implies that all passes MUST be allocated with 'new'.
47 virtual void add(Pass *P) = 0;
50 /// PassManager manages ModulePassManagers
51 class PassManager : public PassManagerBase {
57 /// add - Add a pass to the queue of passes to run. This passes ownership of
58 /// the Pass to the PassManager. When the PassManager is destroyed, the pass
59 /// will be destroyed as well, so there is no need to delete the pass. This
60 /// implies that all passes MUST be allocated with 'new'.
63 /// run - Execute all of the passes scheduled for execution. Keep track of
64 /// whether any of the passes modifies the module, and if so, return true.
68 /// PassManagerImpl_New is the actual class. PassManager is just the
69 /// wraper to publish simple pass manager interface
73 /// FunctionPassManager manages FunctionPasses and BasicBlockPassManagers.
74 class FunctionPassManager : public PassManagerBase {
76 /// FunctionPassManager ctor - This initializes the pass manager. It needs,
77 /// but does not take ownership of, the specified Module.
78 explicit FunctionPassManager(Module *M);
79 ~FunctionPassManager();
81 /// add - Add a pass to the queue of passes to run. This passes
82 /// ownership of the Pass to the PassManager. When the
83 /// PassManager_X is destroyed, the pass will be destroyed as well, so
84 /// there is no need to delete the pass.
85 /// This implies that all passes MUST be allocated with 'new'.
88 /// run - Execute all of the passes scheduled for execution. Keep
89 /// track of whether any of the passes modifies the function, and if
92 bool run(Function &F);
94 /// doInitialization - Run all of the initializers for the function passes.
96 bool doInitialization();
98 /// doFinalization - Run all of the finalizers for the function passes.
100 bool doFinalization();
103 FunctionPassManagerImpl *FPM;
107 // Create wrappers for C Binding types (see CBindingWrapping.h).
108 DEFINE_STDCXX_CONVERSION_FUNCTIONS(PassManagerBase, LLVMPassManagerRef)
110 } // End llvm namespace