llvm-6502/include/llvm/Transforms/IPO.h
Nick Lewycky 579a024661 Add a new MergeFunctions pass. It finds identical functions and merges them.
This triggers only 60 times in llvm-test (look at .llvm.bc, not .linked.rbc)
and so it probably wont be turned on by default. Also, may of those are likely
to go away when PR2973 is fixed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58557 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-02 05:52:50 +00:00

206 lines
8.2 KiB
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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 <vector>
namespace llvm {
class FunctionPass;
class ModulePass;
class Pass;
class Function;
class BasicBlock;
class GlobalValue;
//===----------------------------------------------------------------------===//
//
// 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);
//===----------------------------------------------------------------------===//
/// createLowerSetJmpPass - This function lowers the setjmp/longjmp intrinsics
/// to invoke/unwind instructions. This should really be part of the C/C++
/// front-end, but it's so much easier to write transformations in LLVM proper.
///
ModulePass *createLowerSetJmpPass();
//===----------------------------------------------------------------------===//
/// 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();
//===----------------------------------------------------------------------===//
/// createRaiseAllocationsPass - Return a new pass that transforms malloc and
/// free function calls into malloc and free instructions.
///
ModulePass *createRaiseAllocationsPass();
//===----------------------------------------------------------------------===//
/// createDeadTypeEliminationPass - Return a new pass that eliminates symbol
/// table entries for types that are never used.
///
ModulePass *createDeadTypeEliminationPass();
//===----------------------------------------------------------------------===//
/// createGlobalDCEPass - This transform is designed to eliminate unreachable
/// internal globals (functions or global variables)
///
ModulePass *createGlobalDCEPass();
//===----------------------------------------------------------------------===//
/// createGVExtractionPass - If deleteFn is true, this pass deletes as
/// 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,
bool relinkCallees = false);
//===----------------------------------------------------------------------===//
/// createFunctionInliningPass - Return a new pass object that uses a heuristic
/// to inline direct function calls to small functions.
///
Pass *createFunctionInliningPass();
Pass *createFunctionInliningPass(int Threshold);
//===----------------------------------------------------------------------===//
/// createAlwaysInlinerPass - Return a new pass object that inlines only
/// functions that are marked as "always_inline".
Pass *createAlwaysInlinerPass();
//===----------------------------------------------------------------------===//
/// 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) not part
/// of the api. If a list of symbols is specified with the
/// -internalize-public-api-* command line options, those symbols are not
/// internalized and all others are. Otherwise if AllButMain is set and the
/// main function is found, all other globals are marked as internal. If no api
/// is supplied and AllButMain is not set, or no main function is found, nothing
/// is internalized.
///
ModulePass *createInternalizePass(bool AllButMain);
/// createInternalizePass - This pass loops over all of the functions in the
/// input module, internalizing all globals (functions and variables) not in the
/// given exportList.
///
/// Note that commandline options that are used with the above function are not
/// used now! Also, when exportList is empty, nothing is internalized.
ModulePass *createInternalizePass(const std::vector<const char *> &exportList);
//===----------------------------------------------------------------------===//
/// 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);
Pass *createStructRetPromotionPass();
//===----------------------------------------------------------------------===//
/// 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.
///
FunctionPass *createLoopExtractorPass();
/// createSingleLoopExtractorPass - This pass extracts one natural loop from the
/// program into a function if it can. This is used by bugpoint.
///
FunctionPass *createSingleLoopExtractorPass();
/// createBlockExtractorPass - This pass extracts all blocks (except those
/// specified in the argument list) from the functions in the module.
///
ModulePass *createBlockExtractorPass(const std::vector<BasicBlock*> &BTNE);
/// createIndMemRemPass - This pass removes potential indirect calls of
/// malloc and free
ModulePass *createIndMemRemPass();
/// createStripDeadPrototypesPass - This pass removes any function declarations
/// (prototypes) that are not used.
ModulePass *createStripDeadPrototypesPass();
//===----------------------------------------------------------------------===//
/// createPartialSpecializationPass - This pass specializes functions for
/// constant arguments.
///
ModulePass *createPartialSpecializationPass();
//===----------------------------------------------------------------------===//
/// createAddReadAttrsPass - This pass discovers functions that do not access
/// memory, or only read memory, and gives them the readnone/readonly attribute.
///
Pass *createAddReadAttrsPass();
//===----------------------------------------------------------------------===//
/// createMergeFunctionsPass - This pass discovers identical functions and
/// collapses them.
///
ModulePass *createMergeFunctionsPass();
} // End llvm namespace
#endif