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This is the initial checkin of the basic-block autovectorization pass along with some supporting vectorization infrastructure. Special thanks to everyone who helped review this code over the last several months (especially Tobias Grosser). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149468 91177308-0d34-0410-b5e6-96231b3b80d8
144 lines
5.6 KiB
C++
144 lines
5.6 KiB
C++
// llvm/Transforms/IPO/PassManagerBuilder.h - Build Standard Pass -*- 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 PassManagerBuilder class, which is used to set up a
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// "standard" optimization sequence suitable for languages like C and C++.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_PASSMANAGERBUILDER_H
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#define LLVM_SUPPORT_PASSMANAGERBUILDER_H
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#include <vector>
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namespace llvm {
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class TargetLibraryInfo;
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class PassManagerBase;
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class Pass;
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class FunctionPassManager;
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/// PassManagerBuilder - This class is used to set up a standard optimization
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/// sequence for languages like C and C++, allowing some APIs to customize the
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/// pass sequence in various ways. A simple example of using it would be:
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///
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/// PassManagerBuilder Builder;
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/// Builder.OptLevel = 2;
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/// Builder.populateFunctionPassManager(FPM);
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/// Builder.populateModulePassManager(MPM);
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///
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/// In addition to setting up the basic passes, PassManagerBuilder allows
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/// frontends to vend a plugin API, where plugins are allowed to add extensions
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/// to the default pass manager. They do this by specifying where in the pass
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/// pipeline they want to be added, along with a callback function that adds
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/// the pass(es). For example, a plugin that wanted to add a loop optimization
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/// could do something like this:
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///
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/// static void addMyLoopPass(const PMBuilder &Builder, PassManagerBase &PM) {
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/// if (Builder.getOptLevel() > 2 && Builder.getOptSizeLevel() == 0)
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/// PM.add(createMyAwesomePass());
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/// }
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/// ...
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/// Builder.addExtension(PassManagerBuilder::EP_LoopOptimizerEnd,
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/// addMyLoopPass);
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/// ...
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class PassManagerBuilder {
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public:
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/// Extensions are passed the builder itself (so they can see how it is
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/// configured) as well as the pass manager to add stuff to.
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typedef void (*ExtensionFn)(const PassManagerBuilder &Builder,
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PassManagerBase &PM);
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enum ExtensionPointTy {
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/// EP_EarlyAsPossible - This extension point allows adding passes before
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/// any other transformations, allowing them to see the code as it is coming
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/// out of the frontend.
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EP_EarlyAsPossible,
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/// EP_ModuleOptimizerEarly - This extension point allows adding passes
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/// just before the main module-level optimization passes.
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EP_ModuleOptimizerEarly,
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/// EP_LoopOptimizerEnd - This extension point allows adding loop passes to
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/// the end of the loop optimizer.
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EP_LoopOptimizerEnd,
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/// EP_ScalarOptimizerLate - This extension point allows adding optimization
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/// passes after most of the main optimizations, but before the last
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/// cleanup-ish optimizations.
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EP_ScalarOptimizerLate,
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/// EP_EnabledOnOptLevel0 - This extension point allows adding passes that
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/// should not be disabled by O0 optimization level. The passes will be
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/// inserted after the inlining pass.
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EP_EnabledOnOptLevel0
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};
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/// The Optimization Level - Specify the basic optimization level.
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/// 0 = -O0, 1 = -O1, 2 = -O2, 3 = -O3
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unsigned OptLevel;
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/// SizeLevel - How much we're optimizing for size.
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/// 0 = none, 1 = -Os, 2 = -Oz
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unsigned SizeLevel;
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/// LibraryInfo - Specifies information about the runtime library for the
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/// optimizer. If this is non-null, it is added to both the function and
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/// per-module pass pipeline.
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TargetLibraryInfo *LibraryInfo;
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/// Inliner - Specifies the inliner to use. If this is non-null, it is
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/// added to the per-module passes.
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Pass *Inliner;
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bool DisableSimplifyLibCalls;
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bool DisableUnitAtATime;
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bool DisableUnrollLoops;
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bool Vectorize;
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private:
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/// ExtensionList - This is list of all of the extensions that are registered.
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std::vector<std::pair<ExtensionPointTy, ExtensionFn> > Extensions;
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public:
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PassManagerBuilder();
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~PassManagerBuilder();
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/// Adds an extension that will be used by all PassManagerBuilder instances.
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/// This is intended to be used by plugins, to register a set of
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/// optimisations to run automatically.
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static void addGlobalExtension(ExtensionPointTy Ty, ExtensionFn Fn);
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void addExtension(ExtensionPointTy Ty, ExtensionFn Fn);
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private:
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void addExtensionsToPM(ExtensionPointTy ETy, PassManagerBase &PM) const;
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void addInitialAliasAnalysisPasses(PassManagerBase &PM) const;
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public:
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/// populateFunctionPassManager - This fills in the function pass manager,
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/// which is expected to be run on each function immediately as it is
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/// generated. The idea is to reduce the size of the IR in memory.
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void populateFunctionPassManager(FunctionPassManager &FPM);
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/// populateModulePassManager - This sets up the primary pass manager.
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void populateModulePassManager(PassManagerBase &MPM);
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void populateLTOPassManager(PassManagerBase &PM, bool Internalize,
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bool RunInliner);
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};
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/// Registers a function for adding a standard set of passes. This should be
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/// used by optimizer plugins to allow all front ends to transparently use
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/// them. Create a static instance of this class in your plugin, providing a
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/// private function that the PassManagerBuilder can use to add your passes.
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struct RegisterStandardPasses {
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RegisterStandardPasses(PassManagerBuilder::ExtensionPointTy Ty,
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PassManagerBuilder::ExtensionFn Fn) {
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PassManagerBuilder::addGlobalExtension(Ty, Fn);
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}
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};
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} // end namespace llvm
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#endif
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