IR/PassManager.h File Reference

#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/polymorphic_ptr.h"
#include "llvm/Support/type_traits.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Module.h"
#include <list>
#include <vector>

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Classes
struct	llvm::detail::PassConcept< T >
	Template for the abstract base class used to dispatch polymorphically over pass objects. More...
struct	llvm::detail::PassModel< T, PassT >
	A template wrapper used to implement the polymorphic API. More...
class	llvm::ModulePassManager
class	llvm::FunctionPassManager
class	llvm::AnalysisManager
	An analysis manager to coordinate and cache analyses run over a module. More...

Namespaces
	llvm
	List of target independent CodeGen pass IDs.
	llvm::detail
	Implementation details of the pass manager interfaces.

Detailed Description

This header defines various interfaces for pass management in LLVM. There is no "pass" interface in LLVM per se. Instead, an instance of any class which supports a method to 'run' it over a unit of IR can be used as a pass. A pass manager is generally a tool to collect a sequence of passes which run over a particular IR construct, and run each of them in sequence over each such construct in the containing IR construct. As there is no containing IR construct for a Module, a manager for passes over modules forms the base case which runs its managed passes in sequence over the single module provided.

The core IR library provides managers for running passes over modules and functions.

• FunctionPassManager can run over a Module, runs each pass over a Function.
• ModulePassManager must be directly run, runs each pass over the Module.

Note that the implementations of the pass managers use concept-based polymorphism as outlined in the "Value Semantics and Concept-based Polymorphism" talk (or its abbreviated sibling "Inheritance Is The Base Class of Evil") by Sean Parent:

• http://github.com/sean-parent/sean-parent.github.com/wiki/Papers-and-Presentations
• http://www.youtube.com/watch?v=_BpMYeUFXv8
• http://channel9.msdn.com/Events/GoingNative/2013/Inheritance-Is-The-Base-Class-of-Evil

Definition in file IR/PassManager.h.