Import prebuilt clang toolchain for linux.
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+//===- llvm/Transforms/IPO.h - Interprocedural Transformations --*- 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 IPO transformations library.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_IPO_H
+#define LLVM_TRANSFORMS_IPO_H
+
+#include "llvm/ADT/SmallVector.h"
+#include <functional>
+#include <vector>
+
+namespace llvm {
+
+struct InlineParams;
+class StringRef;
+class ModuleSummaryIndex;
+class ModulePass;
+class Pass;
+class Function;
+class BasicBlock;
+class GlobalValue;
+class raw_ostream;
+
+//===----------------------------------------------------------------------===//
+//
+// These functions removes symbols from functions and modules. If OnlyDebugInfo
+// is true, only debugging information is removed from the module.
+//
+ModulePass *createStripSymbolsPass(bool OnlyDebugInfo = false);
+
+//===----------------------------------------------------------------------===//
+//
+// These functions strips symbols from functions and modules.
+// Only debugging information is not stripped.
+//
+ModulePass *createStripNonDebugSymbolsPass();
+
+//===----------------------------------------------------------------------===//
+//
+// This pass removes llvm.dbg.declare intrinsics.
+ModulePass *createStripDebugDeclarePass();
+
+//===----------------------------------------------------------------------===//
+//
+// This pass removes unused symbols' debug info.
+ModulePass *createStripDeadDebugInfoPass();
+
+//===----------------------------------------------------------------------===//
+/// createConstantMergePass - This function returns a new pass that merges
+/// duplicate global constants together into a single constant that is shared.
+/// This is useful because some passes (ie TraceValues) insert a lot of string
+/// constants into the program, regardless of whether or not they duplicate an
+/// existing string.
+///
+ModulePass *createConstantMergePass();
+
+//===----------------------------------------------------------------------===//
+/// createGlobalOptimizerPass - This function returns a new pass that optimizes
+/// non-address taken internal globals.
+///
+ModulePass *createGlobalOptimizerPass();
+
+//===----------------------------------------------------------------------===//
+/// createGlobalDCEPass - This transform is designed to eliminate unreachable
+/// internal globals (functions or global variables)
+///
+ModulePass *createGlobalDCEPass();
+
+//===----------------------------------------------------------------------===//
+/// This transform is designed to eliminate available external globals
+/// (functions or global variables)
+///
+ModulePass *createEliminateAvailableExternallyPass();
+
+//===----------------------------------------------------------------------===//
+/// createGVExtractionPass - If deleteFn is true, this pass deletes
+/// the specified global values. Otherwise, it deletes as much of the module as
+/// possible, except for the global values specified.
+///
+ModulePass *createGVExtractionPass(std::vector<GlobalValue*>& GVs, bool
+ deleteFn = false);
+
+//===----------------------------------------------------------------------===//
+/// This pass performs iterative function importing from other modules.
+Pass *createFunctionImportPass();
+
+//===----------------------------------------------------------------------===//
+/// createFunctionInliningPass - Return a new pass object that uses a heuristic
+/// to inline direct function calls to small functions.
+///
+/// The Threshold can be passed directly, or asked to be computed from the
+/// given optimization and size optimization arguments.
+///
+/// The -inline-threshold command line option takes precedence over the
+/// threshold given here.
+Pass *createFunctionInliningPass();
+Pass *createFunctionInliningPass(int Threshold);
+Pass *createFunctionInliningPass(unsigned OptLevel, unsigned SizeOptLevel,
+ bool DisableInlineHotCallSite);
+Pass *createFunctionInliningPass(InlineParams &Params);
+
+//===----------------------------------------------------------------------===//
+/// createPruneEHPass - Return a new pass object which transforms invoke
+/// instructions into calls, if the callee can _not_ unwind the stack.
+///
+Pass *createPruneEHPass();
+
+//===----------------------------------------------------------------------===//
+/// createInternalizePass - This pass loops over all of the functions in the
+/// input module, internalizing all globals (functions and variables) it can.
+////
+/// Before internalizing a symbol, the callback \p MustPreserveGV is invoked and
+/// gives to the client the ability to prevent internalizing specific symbols.
+///
+/// The symbol in DSOList are internalized if it is safe to drop them from
+/// the symbol table.
+///
+/// Note that commandline options that are used with the above function are not
+/// used now!
+ModulePass *
+createInternalizePass(std::function<bool(const GlobalValue &)> MustPreserveGV);
+
+/// createInternalizePass - Same as above, but with an empty exportList.
+ModulePass *createInternalizePass();
+
+//===----------------------------------------------------------------------===//
+/// createDeadArgEliminationPass - This pass removes arguments from functions
+/// which are not used by the body of the function.
+///
+ModulePass *createDeadArgEliminationPass();
+
+/// DeadArgHacking pass - Same as DAE, but delete arguments of external
+/// functions as well. This is definitely not safe, and should only be used by
+/// bugpoint.
+ModulePass *createDeadArgHackingPass();
+
+//===----------------------------------------------------------------------===//
+/// createArgumentPromotionPass - This pass promotes "by reference" arguments to
+/// be passed by value if the number of elements passed is smaller or
+/// equal to maxElements (maxElements == 0 means always promote).
+///
+Pass *createArgumentPromotionPass(unsigned maxElements = 3);
+
+//===----------------------------------------------------------------------===//
+/// createIPConstantPropagationPass - This pass propagates constants from call
+/// sites into the bodies of functions.
+///
+ModulePass *createIPConstantPropagationPass();
+
+//===----------------------------------------------------------------------===//
+/// createIPSCCPPass - This pass propagates constants from call sites into the
+/// bodies of functions, and keeps track of whether basic blocks are executable
+/// in the process.
+///
+ModulePass *createIPSCCPPass();
+
+//===----------------------------------------------------------------------===//
+//
+/// createLoopExtractorPass - This pass extracts all natural loops from the
+/// program into a function if it can.
+///
+Pass *createLoopExtractorPass();
+
+/// createSingleLoopExtractorPass - This pass extracts one natural loop from the
+/// program into a function if it can. This is used by bugpoint.
+///
+Pass *createSingleLoopExtractorPass();
+
+/// createBlockExtractorPass - This pass extracts all the specified blocks
+/// from the functions in the module.
+///
+ModulePass *createBlockExtractorPass();
+ModulePass *
+createBlockExtractorPass(const SmallVectorImpl<BasicBlock *> &BlocksToExtract,
+ bool EraseFunctions);
+
+/// createStripDeadPrototypesPass - This pass removes any function declarations
+/// (prototypes) that are not used.
+ModulePass *createStripDeadPrototypesPass();
+
+//===----------------------------------------------------------------------===//
+/// createReversePostOrderFunctionAttrsPass - This pass walks SCCs of the call
+/// graph in RPO to deduce and propagate function attributes. Currently it
+/// only handles synthesizing norecurse attributes.
+///
+Pass *createReversePostOrderFunctionAttrsPass();
+
+//===----------------------------------------------------------------------===//
+/// createMergeFunctionsPass - This pass discovers identical functions and
+/// collapses them.
+///
+ModulePass *createMergeFunctionsPass();
+
+//===----------------------------------------------------------------------===//
+/// createPartialInliningPass - This pass inlines parts of functions.
+///
+ModulePass *createPartialInliningPass();
+
+//===----------------------------------------------------------------------===//
+/// createBarrierNoopPass - This pass is purely a module pass barrier in a pass
+/// manager.
+ModulePass *createBarrierNoopPass();
+
+/// createCalledValuePropagationPass - Attach metadata to indirct call sites
+/// indicating the set of functions they may target at run-time.
+ModulePass *createCalledValuePropagationPass();
+
+/// What to do with the summary when running passes that operate on it.
+enum class PassSummaryAction {
+ None, ///< Do nothing.
+ Import, ///< Import information from summary.
+ Export, ///< Export information to summary.
+};
+
+/// \brief This pass lowers type metadata and the llvm.type.test intrinsic to
+/// bitsets.
+///
+/// The behavior depends on the summary arguments:
+/// - If ExportSummary is non-null, this pass will export type identifiers to
+/// the given summary.
+/// - Otherwise, if ImportSummary is non-null, this pass will import type
+/// identifiers from the given summary.
+/// - Otherwise it does neither.
+/// It is invalid for both ExportSummary and ImportSummary to be non-null.
+ModulePass *createLowerTypeTestsPass(ModuleSummaryIndex *ExportSummary,
+ const ModuleSummaryIndex *ImportSummary);
+
+/// \brief This pass export CFI checks for use by external modules.
+ModulePass *createCrossDSOCFIPass();
+
+/// \brief This pass implements whole-program devirtualization using type
+/// metadata.
+///
+/// The behavior depends on the summary arguments:
+/// - If ExportSummary is non-null, this pass will export type identifiers to
+/// the given summary.
+/// - Otherwise, if ImportSummary is non-null, this pass will import type
+/// identifiers from the given summary.
+/// - Otherwise it does neither.
+/// It is invalid for both ExportSummary and ImportSummary to be non-null.
+ModulePass *
+createWholeProgramDevirtPass(ModuleSummaryIndex *ExportSummary,
+ const ModuleSummaryIndex *ImportSummary);
+
+/// This pass splits globals into pieces for the benefit of whole-program
+/// devirtualization and control-flow integrity.
+ModulePass *createGlobalSplitPass();
+
+//===----------------------------------------------------------------------===//
+// SampleProfilePass - Loads sample profile data from disk and generates
+// IR metadata to reflect the profile.
+ModulePass *createSampleProfileLoaderPass();
+ModulePass *createSampleProfileLoaderPass(StringRef Name);
+
+/// Write ThinLTO-ready bitcode to Str.
+ModulePass *createWriteThinLTOBitcodePass(raw_ostream &Str,
+ raw_ostream *ThinLinkOS = nullptr);
+
+} // End llvm namespace
+
+#endif