llvm-6502/include/llvm/Analysis/Passes.h
Jingyue Wu 5733100450 Divergence analysis for GPU programs
Summary:
Some optimizations such as jump threading and loop unswitching can negatively
affect performance when applied to divergent branches. The divergence analysis
added in this patch conservatively estimates which branches in a GPU program
can diverge. This information can then help LLVM to run certain optimizations
selectively.

Test Plan: test/Analysis/DivergenceAnalysis/NVPTX/diverge.ll

Reviewers: resistor, hfinkel, eliben, meheff, jholewinski

Subscribers: broune, bjarke.roune, madhur13490, tstellarAMD, dberlin, echristo, jholewinski, llvm-commits

Differential Revision: http://reviews.llvm.org/D8576

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234567 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-10 05:03:50 +00:00

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//===-- llvm/Analysis/Passes.h - Constructors for analyses ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This header file defines prototypes for accessor functions that expose passes
// in the analysis libraries.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ANALYSIS_PASSES_H
#define LLVM_ANALYSIS_PASSES_H
namespace llvm {
class FunctionPass;
class ImmutablePass;
class LoopPass;
class ModulePass;
class Pass;
class PassInfo;
class LibCallInfo;
//===--------------------------------------------------------------------===//
//
// createGlobalsModRefPass - This pass provides alias and mod/ref info for
// global values that do not have their addresses taken.
//
Pass *createGlobalsModRefPass();
//===--------------------------------------------------------------------===//
//
// createAliasDebugger - This pass helps debug clients of AA
//
Pass *createAliasDebugger();
//===--------------------------------------------------------------------===//
//
// createAliasAnalysisCounterPass - This pass counts alias queries and how the
// alias analysis implementation responds.
//
ModulePass *createAliasAnalysisCounterPass();
//===--------------------------------------------------------------------===//
//
// createAAEvalPass - This pass implements a simple N^2 alias analysis
// accuracy evaluator.
//
FunctionPass *createAAEvalPass();
//===--------------------------------------------------------------------===//
//
// createNoAAPass - This pass implements a "I don't know" alias analysis.
//
ImmutablePass *createNoAAPass();
//===--------------------------------------------------------------------===//
//
// createBasicAliasAnalysisPass - This pass implements the stateless alias
// analysis.
//
ImmutablePass *createBasicAliasAnalysisPass();
//===--------------------------------------------------------------------===//
//
// createCFLAliasAnalysisPass - This pass implements a set-based approach to
// alias analysis.
//
ImmutablePass *createCFLAliasAnalysisPass();
//===--------------------------------------------------------------------===//
//
/// createLibCallAliasAnalysisPass - Create an alias analysis pass that knows
/// about the semantics of a set of libcalls specified by LCI. The newly
/// constructed pass takes ownership of the pointer that is provided.
///
FunctionPass *createLibCallAliasAnalysisPass(LibCallInfo *LCI);
//===--------------------------------------------------------------------===//
//
// createScalarEvolutionAliasAnalysisPass - This pass implements a simple
// alias analysis using ScalarEvolution queries.
//
FunctionPass *createScalarEvolutionAliasAnalysisPass();
//===--------------------------------------------------------------------===//
//
// createTypeBasedAliasAnalysisPass - This pass implements metadata-based
// type-based alias analysis.
//
ImmutablePass *createTypeBasedAliasAnalysisPass();
//===--------------------------------------------------------------------===//
//
// createScopedNoAliasAAPass - This pass implements metadata-based
// scoped noalias analysis.
//
ImmutablePass *createScopedNoAliasAAPass();
//===--------------------------------------------------------------------===//
//
// createObjCARCAliasAnalysisPass - This pass implements ObjC-ARC-based
// alias analysis.
//
ImmutablePass *createObjCARCAliasAnalysisPass();
FunctionPass *createPAEvalPass();
//===--------------------------------------------------------------------===//
//
/// createLazyValueInfoPass - This creates an instance of the LazyValueInfo
/// pass.
FunctionPass *createLazyValueInfoPass();
//===--------------------------------------------------------------------===//
//
// createDependenceAnalysisPass - This creates an instance of the
// DependenceAnalysis pass.
//
FunctionPass *createDependenceAnalysisPass();
//===--------------------------------------------------------------------===//
//
// createCostModelAnalysisPass - This creates an instance of the
// CostModelAnalysis pass.
//
FunctionPass *createCostModelAnalysisPass();
//===--------------------------------------------------------------------===//
//
// createDelinearizationPass - This pass implements attempts to restore
// multidimensional array indices from linearized expressions.
//
FunctionPass *createDelinearizationPass();
//===--------------------------------------------------------------------===//
//
// createDivergenceAnalysisPass - This pass determines which branches in a GPU
// program are divergent.
//
FunctionPass *createDivergenceAnalysisPass();
//===--------------------------------------------------------------------===//
//
// Minor pass prototypes, allowing us to expose them through bugpoint and
// analyze.
FunctionPass *createInstCountPass();
//===--------------------------------------------------------------------===//
//
// createRegionInfoPass - This pass finds all single entry single exit regions
// in a function and builds the region hierarchy.
//
FunctionPass *createRegionInfoPass();
// Print module-level debug info metadata in human-readable form.
ModulePass *createModuleDebugInfoPrinterPass();
//===--------------------------------------------------------------------===//
//
// createMemDepPrinter - This pass exhaustively collects all memdep
// information and prints it with -analyze.
//
FunctionPass *createMemDepPrinter();
//===--------------------------------------------------------------------===//
//
// createMemDerefPrinter - This pass collects memory dereferenceability
// information and prints it with -analyze.
//
FunctionPass *createMemDerefPrinter();
}
#endif