1 //===- llvm/Transforms/IPO.h - Interprocedural Transformations --*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This header file defines prototypes for accessor functions that expose passes 11 // in the IPO transformations library. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_TRANSFORMS_IPO_H 16 #define LLVM_TRANSFORMS_IPO_H 17 18 #include <vector> 19 20 namespace llvm { 21 22 class ModulePass; 23 class Pass; 24 class Function; 25 class BasicBlock; 26 class GlobalValue; 27 28 //===----------------------------------------------------------------------===// 29 // 30 // These functions removes symbols from functions and modules. If OnlyDebugInfo 31 // is true, only debugging information is removed from the module. 32 // 33 ModulePass *createStripSymbolsPass(bool OnlyDebugInfo = false); 34 35 //===----------------------------------------------------------------------===// 36 // 37 // These functions strips symbols from functions and modules. 38 // Only debugging information is not stripped. 39 // 40 ModulePass *createStripNonDebugSymbolsPass(); 41 42 //===----------------------------------------------------------------------===// 43 // 44 // These pass removes llvm.dbg.declare intrinsics. 45 ModulePass *createStripDebugDeclarePass(); 46 47 //===----------------------------------------------------------------------===// 48 // 49 // These pass removes unused symbols' debug info. 50 ModulePass *createStripDeadDebugInfoPass(); 51 52 //===----------------------------------------------------------------------===// 53 /// createConstantMergePass - This function returns a new pass that merges 54 /// duplicate global constants together into a single constant that is shared. 55 /// This is useful because some passes (ie TraceValues) insert a lot of string 56 /// constants into the program, regardless of whether or not they duplicate an 57 /// existing string. 58 /// 59 ModulePass *createConstantMergePass(); 60 61 62 //===----------------------------------------------------------------------===// 63 /// createGlobalOptimizerPass - This function returns a new pass that optimizes 64 /// non-address taken internal globals. 65 /// 66 ModulePass *createGlobalOptimizerPass(); 67 68 69 //===----------------------------------------------------------------------===// 70 /// createGlobalDCEPass - This transform is designed to eliminate unreachable 71 /// internal globals (functions or global variables) 72 /// 73 ModulePass *createGlobalDCEPass(); 74 75 76 //===----------------------------------------------------------------------===// 77 /// createGVExtractionPass - If deleteFn is true, this pass deletes 78 /// the specified global values. Otherwise, it deletes as much of the module as 79 /// possible, except for the global values specified. 80 /// 81 ModulePass *createGVExtractionPass(std::vector<GlobalValue*>& GVs, bool 82 deleteFn = false); 83 84 //===----------------------------------------------------------------------===// 85 /// createFunctionInliningPass - Return a new pass object that uses a heuristic 86 /// to inline direct function calls to small functions. 87 /// 88 /// The -inline-threshold command line option takes precedence over the 89 /// threshold given here. 90 Pass *createFunctionInliningPass(); 91 Pass *createFunctionInliningPass(int Threshold); 92 93 //===----------------------------------------------------------------------===// 94 /// createAlwaysInlinerPass - Return a new pass object that inlines only 95 /// functions that are marked as "always_inline". 96 Pass *createAlwaysInlinerPass(); 97 98 //===----------------------------------------------------------------------===// 99 /// createPruneEHPass - Return a new pass object which transforms invoke 100 /// instructions into calls, if the callee can _not_ unwind the stack. 101 /// 102 Pass *createPruneEHPass(); 103 104 //===----------------------------------------------------------------------===// 105 /// createInternalizePass - This pass loops over all of the functions in the 106 /// input module, internalizing all globals (functions and variables) not part 107 /// of the api. If a list of symbols is specified with the 108 /// -internalize-public-api-* command line options, those symbols are not 109 /// internalized and all others are. Otherwise if AllButMain is set and the 110 /// main function is found, all other globals are marked as internal. If no api 111 /// is supplied and AllButMain is not set, or no main function is found, nothing 112 /// is internalized. 113 /// 114 ModulePass *createInternalizePass(bool AllButMain); 115 116 /// createInternalizePass - This pass loops over all of the functions in the 117 /// input module, internalizing all globals (functions and variables) not in the 118 /// given exportList. 119 /// 120 /// Note that commandline options that are used with the above function are not 121 /// used now! Also, when exportList is empty, nothing is internalized. 122 ModulePass *createInternalizePass(const std::vector<const char *> &exportList); 123 124 //===----------------------------------------------------------------------===// 125 /// createDeadArgEliminationPass - This pass removes arguments from functions 126 /// which are not used by the body of the function. 127 /// 128 ModulePass *createDeadArgEliminationPass(); 129 130 /// DeadArgHacking pass - Same as DAE, but delete arguments of external 131 /// functions as well. This is definitely not safe, and should only be used by 132 /// bugpoint. 133 ModulePass *createDeadArgHackingPass(); 134 135 //===----------------------------------------------------------------------===// 136 /// createArgumentPromotionPass - This pass promotes "by reference" arguments to 137 /// be passed by value if the number of elements passed is smaller or 138 /// equal to maxElements (maxElements == 0 means always promote). 139 /// 140 Pass *createArgumentPromotionPass(unsigned maxElements = 3); 141 142 //===----------------------------------------------------------------------===// 143 /// createIPConstantPropagationPass - This pass propagates constants from call 144 /// sites into the bodies of functions. 145 /// 146 ModulePass *createIPConstantPropagationPass(); 147 148 //===----------------------------------------------------------------------===// 149 /// createIPSCCPPass - This pass propagates constants from call sites into the 150 /// bodies of functions, and keeps track of whether basic blocks are executable 151 /// in the process. 152 /// 153 ModulePass *createIPSCCPPass(); 154 155 //===----------------------------------------------------------------------===// 156 // 157 /// createLoopExtractorPass - This pass extracts all natural loops from the 158 /// program into a function if it can. 159 /// 160 Pass *createLoopExtractorPass(); 161 162 /// createSingleLoopExtractorPass - This pass extracts one natural loop from the 163 /// program into a function if it can. This is used by bugpoint. 164 /// 165 Pass *createSingleLoopExtractorPass(); 166 167 /// createBlockExtractorPass - This pass extracts all blocks (except those 168 /// specified in the argument list) from the functions in the module. 169 /// 170 ModulePass *createBlockExtractorPass(); 171 172 /// createStripDeadPrototypesPass - This pass removes any function declarations 173 /// (prototypes) that are not used. 174 ModulePass *createStripDeadPrototypesPass(); 175 176 //===----------------------------------------------------------------------===// 177 /// createFunctionAttrsPass - This pass discovers functions that do not access 178 /// memory, or only read memory, and gives them the readnone/readonly attribute. 179 /// It also discovers function arguments that are not captured by the function 180 /// and marks them with the nocapture attribute. 181 /// 182 Pass *createFunctionAttrsPass(); 183 184 //===----------------------------------------------------------------------===// 185 /// createMergeFunctionsPass - This pass discovers identical functions and 186 /// collapses them. 187 /// 188 ModulePass *createMergeFunctionsPass(); 189 190 //===----------------------------------------------------------------------===// 191 /// createPartialInliningPass - This pass inlines parts of functions. 192 /// 193 ModulePass *createPartialInliningPass(); 194 195 } // End llvm namespace 196 197 #endif 198
