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7d4e9934e7
This puts all the global PassManager debugging flags, like -print-after-all and -time-passes, behind a managed static. This eliminates their static initializers and, more importantly, exit-time destructors. The only behavioral change I anticipate is that tools need to initialize the PassManager before parsing the command line in order to export these options, which makes sense. Tools that already initialize the standard passes (opt/llc) don't need to do anything new. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190974 91177308-0d34-0410-b5e6-96231b3b80d8
113 lines
3.7 KiB
C++
113 lines
3.7 KiB
C++
//===- llvm/PassManager.h - Container for Passes ----------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the PassManager class. This class is used to hold,
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// maintain, and optimize execution of Passes. The PassManager class ensures
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// that analysis results are available before a pass runs, and that Pass's are
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// destroyed when the PassManager is destroyed.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_PASSMANAGER_H
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#define LLVM_PASSMANAGER_H
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#include "llvm/Pass.h"
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#include "llvm/Support/CBindingWrapping.h"
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namespace llvm {
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class Pass;
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class Module;
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class PassManagerImpl;
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class FunctionPassManagerImpl;
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/// Called by tools to initialize globals and register options at a particular
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/// point (before command line parsing). If this is not called, then PassManager
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/// globals are lazily initialized at first use.
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void initializePassManager();
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/// PassManagerBase - An abstract interface to allow code to add passes to
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/// a pass manager without having to hard-code what kind of pass manager
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/// it is.
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class PassManagerBase {
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public:
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virtual ~PassManagerBase();
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/// add - Add a pass to the queue of passes to run. This passes ownership of
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/// the Pass to the PassManager. When the PassManager is destroyed, the pass
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/// will be destroyed as well, so there is no need to delete the pass. This
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/// implies that all passes MUST be allocated with 'new'.
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virtual void add(Pass *P) = 0;
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};
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/// PassManager manages ModulePassManagers
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class PassManager : public PassManagerBase {
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public:
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PassManager();
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~PassManager();
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/// add - Add a pass to the queue of passes to run. This passes ownership of
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/// the Pass to the PassManager. When the PassManager is destroyed, the pass
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/// will be destroyed as well, so there is no need to delete the pass. This
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/// implies that all passes MUST be allocated with 'new'.
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void add(Pass *P);
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/// run - Execute all of the passes scheduled for execution. Keep track of
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/// whether any of the passes modifies the module, and if so, return true.
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bool run(Module &M);
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private:
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/// PassManagerImpl_New is the actual class. PassManager is just the
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/// wraper to publish simple pass manager interface
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PassManagerImpl *PM;
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};
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/// FunctionPassManager manages FunctionPasses and BasicBlockPassManagers.
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class FunctionPassManager : public PassManagerBase {
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public:
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/// FunctionPassManager ctor - This initializes the pass manager. It needs,
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/// but does not take ownership of, the specified Module.
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explicit FunctionPassManager(Module *M);
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~FunctionPassManager();
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/// add - Add a pass to the queue of passes to run. This passes
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/// ownership of the Pass to the PassManager. When the
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/// PassManager_X is destroyed, the pass will be destroyed as well, so
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/// there is no need to delete the pass.
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/// This implies that all passes MUST be allocated with 'new'.
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void add(Pass *P);
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/// run - Execute all of the passes scheduled for execution. Keep
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/// track of whether any of the passes modifies the function, and if
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/// so, return true.
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///
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bool run(Function &F);
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/// doInitialization - Run all of the initializers for the function passes.
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///
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bool doInitialization();
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/// doFinalization - Run all of the finalizers for the function passes.
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///
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bool doFinalization();
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private:
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FunctionPassManagerImpl *FPM;
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Module *M;
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};
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// Create wrappers for C Binding types (see CBindingWrapping.h).
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DEFINE_STDCXX_CONVERSION_FUNCTIONS(PassManagerBase, LLVMPassManagerRef)
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} // End llvm namespace
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#endif
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