JIT.cpp revision a54b7cbd452b3adb2f51346140d996b29c2cdb30
14d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner//===-- JIT.cpp - LLVM Just in Time Compiler ------------------------------===// 2f976c856fcc5055f3fc7d9f070d72c2d027c1d9dMisha Brukman// 3b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// The LLVM Compiler Infrastructure 4b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// 5b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// This file was developed by the LLVM research group and is distributed under 6b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell// the University of Illinois Open Source License. See LICENSE.TXT for details. 7f976c856fcc5055f3fc7d9f070d72c2d027c1d9dMisha Brukman// 8b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell//===----------------------------------------------------------------------===// 9bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner// 104d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner// This tool implements a just-in-time compiler for LLVM, allowing direct 114d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner// execution of LLVM bytecode in an efficient manner. 12bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner// 13bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner//===----------------------------------------------------------------------===// 14bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner 154d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner#include "JIT.h" 16cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner#include "llvm/Constants.h" 17c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner#include "llvm/DerivedTypes.h" 184d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner#include "llvm/Function.h" 19c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner#include "llvm/GlobalVariable.h" 20cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner#include "llvm/Instructions.h" 210f4f7d9eb72dec2a72ec596fb3d611a241893bb7Misha Brukman#include "llvm/ModuleProvider.h" 224d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner#include "llvm/CodeGen/MachineCodeEmitter.h" 234d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner#include "llvm/CodeGen/MachineFunction.h" 249722294d30fff2a432d8e171eb904f33956353e2Brian Gaeke#include "llvm/ExecutionEngine/GenericValue.h" 25e7fd553b3be8b95dc0946cd3267bc2db859cd3d8Chris Lattner#include "llvm/Support/MutexGuard.h" 26df5a37efc997288da520ff4889443e3560d95387Reid Spencer#include "llvm/System/DynamicLibrary.h" 2707000c6f01d8f57170f2d4c77a86d934bdc5c696Owen Anderson#include "llvm/Target/TargetData.h" 28bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner#include "llvm/Target/TargetMachine.h" 294d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner#include "llvm/Target/TargetJITInfo.h" 30c19aadee66b744311afe6e420847e80822a765f2Chris Lattnerusing namespace llvm; 31abb027cf412944db4d27579ba3ae00717d23c25eMisha Brukman 32b76ea74845849e7a499603bb04bfe1614101e910Nate Begeman#ifdef __APPLE__ 33b76ea74845849e7a499603bb04bfe1614101e910Nate Begeman#include <AvailabilityMacros.h> 34c1f400ccddeaacd2bd6c123bb7895be632d82678Chris Lattner#if defined(MAC_OS_X_VERSION_10_4) && \ 35c1f400ccddeaacd2bd6c123bb7895be632d82678Chris Lattner ((MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4) || \ 36c1f400ccddeaacd2bd6c123bb7895be632d82678Chris Lattner (MAC_OS_X_VERSION_MIN_REQUIRED == MAC_OS_X_VERSION_10_4 && \ 37c1f400ccddeaacd2bd6c123bb7895be632d82678Chris Lattner __APPLE_CC__ >= 5330)) 385f42c550305814f916207b9604b92fbd258e8eafEvan Cheng// __dso_handle is resolved by Mac OS X dynamic linker. 395f42c550305814f916207b9604b92fbd258e8eafEvan Chengextern void *__dso_handle __attribute__ ((__visibility__ ("hidden"))); 405f42c550305814f916207b9604b92fbd258e8eafEvan Cheng#endif 41b76ea74845849e7a499603bb04bfe1614101e910Nate Begeman#endif 425f42c550305814f916207b9604b92fbd258e8eafEvan Cheng 432fe4bb06c6c40d16b7a5ae9cdf6bb6fe94d51be0Chris Lattnerstatic struct RegisterJIT { 442fe4bb06c6c40d16b7a5ae9cdf6bb6fe94d51be0Chris Lattner RegisterJIT() { JIT::Register(); } 452fe4bb06c6c40d16b7a5ae9cdf6bb6fe94d51be0Chris Lattner} JITRegistrator; 462fe4bb06c6c40d16b7a5ae9cdf6bb6fe94d51be0Chris Lattner 472f51914d828b462b054195e73c75448f24e01979Jeff Cohennamespace llvm { 482f51914d828b462b054195e73c75448f24e01979Jeff Cohen void LinkInJIT() { 492f51914d828b462b054195e73c75448f24e01979Jeff Cohen } 502f51914d828b462b054195e73c75448f24e01979Jeff Cohen} 512f51914d828b462b054195e73c75448f24e01979Jeff Cohen 524d326fa9bea5b80147edf14d1521fc41ce315275Chris LattnerJIT::JIT(ModuleProvider *MP, TargetMachine &tm, TargetJITInfo &tji) 53ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer : ExecutionEngine(MP), TM(tm), TJI(tji), state(MP) { 54bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner setTargetData(TM.getTargetData()); 55abb027cf412944db4d27579ba3ae00717d23c25eMisha Brukman 56abb027cf412944db4d27579ba3ae00717d23c25eMisha Brukman // Initialize MCE 57906f5fa5c8bb790201c79a33ea6d906f9f57f827Misha Brukman MCE = createEmitter(*this); 58f976c856fcc5055f3fc7d9f070d72c2d027c1d9dMisha Brukman 5950872d5385463cf1d2e23a758516e7f818e1af24Brian Gaeke // Add target data 60ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer MutexGuard locked(lock); 611911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner FunctionPassManager &PM = state.getPM(locked); 62b93b0347d8715e9f2ded1dc56a086f92aeedfb86Chris Lattner PM.add(new TargetData(*TM.getTargetData())); 6350872d5385463cf1d2e23a758516e7f818e1af24Brian Gaeke 644d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner // Turn the machine code intermediate representation into bytes in memory that 654d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner // may be executed. 661911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner if (TM.addPassesToEmitMachineCode(PM, *MCE, false /*fast*/)) { 67832171cb9724d2d31c8dfb73172e2be8f6dd13eeBill Wendling cerr << "Target does not support machine code emission!\n"; 684d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner abort(); 694d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner } 701911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner 711911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner // Initialize passes. 721911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner PM.doInitialization(); 73bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner} 74bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner 754d326fa9bea5b80147edf14d1521fc41ce315275Chris LattnerJIT::~JIT() { 764d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner delete MCE; 774d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner delete &TM; 784d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner} 794d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 8070975eef572b9e132bbaade16ba9edb76f15f287Brian Gaeke/// run - Start execution with the specified function and arguments. 8105a1a306bcfba2b533dc1210d24924e5f3e9ed0eChris Lattner/// 82ff0f1bb32a439cf82cb09ee29544c894a2bfe877Chris LattnerGenericValue JIT::runFunction(Function *F, 83ff0f1bb32a439cf82cb09ee29544c894a2bfe877Chris Lattner const std::vector<GenericValue> &ArgValues) { 84b47130c580385a5a2c922c480a85438b2bb80293Chris Lattner assert(F && "Function *F was null at entry to run()"); 85b47130c580385a5a2c922c480a85438b2bb80293Chris Lattner 86b47130c580385a5a2c922c480a85438b2bb80293Chris Lattner void *FPtr = getPointerToFunction(F); 877c45d7898bdfdc29a61a58b678e13ed41333ed51Chris Lattner assert(FPtr && "Pointer to fn's code was null after getPointerToFunction"); 88f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner const FunctionType *FTy = F->getFunctionType(); 89e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner const Type *RetTy = FTy->getReturnType(); 90bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner 91e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner assert((FTy->getNumParams() <= ArgValues.size() || FTy->isVarArg()) && 92e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner "Too many arguments passed into function!"); 93e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner assert(FTy->getNumParams() == ArgValues.size() && 94e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner "This doesn't support passing arguments through varargs (yet)!"); 95e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner 96ec8430270a9f1adbf9b790319a1d4781658359fdMisha Brukman // Handle some common cases first. These cases correspond to common `main' 97e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner // prototypes. 98e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer if (RetTy == Type::Int32Ty || RetTy == Type::Int32Ty || RetTy == Type::VoidTy) { 99f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner switch (ArgValues.size()) { 100f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner case 3: 101e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer if ((FTy->getParamType(0) == Type::Int32Ty || 102e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer FTy->getParamType(0) == Type::Int32Ty) && 103f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner isa<PointerType>(FTy->getParamType(1)) && 104f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner isa<PointerType>(FTy->getParamType(2))) { 105f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner int (*PF)(int, char **, const char **) = 106870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner (int(*)(int, char **, const char **))(intptr_t)FPtr; 107ec8430270a9f1adbf9b790319a1d4781658359fdMisha Brukman 108f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner // Call the function. 109e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner GenericValue rv; 110e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer rv.Int32Val = PF(ArgValues[0].Int32Val, (char **)GVTOP(ArgValues[1]), 111f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner (const char **)GVTOP(ArgValues[2])); 112f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner return rv; 113f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner } 114f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner break; 115174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner case 2: 116e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer if ((FTy->getParamType(0) == Type::Int32Ty || 117e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer FTy->getParamType(0) == Type::Int32Ty) && 118174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner isa<PointerType>(FTy->getParamType(1))) { 119870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner int (*PF)(int, char **) = (int(*)(int, char **))(intptr_t)FPtr; 120ec8430270a9f1adbf9b790319a1d4781658359fdMisha Brukman 121174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner // Call the function. 122174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner GenericValue rv; 123e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer rv.Int32Val = PF(ArgValues[0].Int32Val, (char **)GVTOP(ArgValues[1])); 124174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner return rv; 125174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner } 126174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner break; 127f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner case 1: 128f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner if (FTy->getNumParams() == 1 && 129e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer (FTy->getParamType(0) == Type::Int32Ty || 130e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer FTy->getParamType(0) == Type::Int32Ty)) { 131e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner GenericValue rv; 132870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner int (*PF)(int) = (int(*)(int))(intptr_t)FPtr; 133e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer rv.Int32Val = PF(ArgValues[0].Int32Val); 134f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner return rv; 135f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner } 136f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner break; 137e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner } 138e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner } 139e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner 140e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner // Handle cases where no arguments are passed first. 141e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner if (ArgValues.empty()) { 142e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner GenericValue rv; 143e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner switch (RetTy->getTypeID()) { 144e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner default: assert(0 && "Unknown return type for function call!"); 145a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer case Type::IntegerTyID: { 146a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer unsigned BitWidth = cast<IntegerType>(RetTy)->getBitWidth(); 147a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer if (BitWidth == 1) 148a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer rv.Int1Val = ((bool(*)())(intptr_t)FPtr)(); 149a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 8) 150a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer rv.Int8Val = ((char(*)())(intptr_t)FPtr)(); 151a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 16) 152a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer rv.Int16Val = ((short(*)())(intptr_t)FPtr)(); 153a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 32) 154a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer rv.Int32Val = ((int(*)())(intptr_t)FPtr)(); 155a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 64) 156a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer rv.Int64Val = ((int64_t(*)())(intptr_t)FPtr)(); 157a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else 158a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer assert(0 && "Integer types > 64 bits not supported"); 159e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner return rv; 160a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer } 161e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner case Type::VoidTyID: 162e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer rv.Int32Val = ((int(*)())(intptr_t)FPtr)(); 163e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner return rv; 164e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner case Type::FloatTyID: 165870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner rv.FloatVal = ((float(*)())(intptr_t)FPtr)(); 166e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner return rv; 167e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner case Type::DoubleTyID: 168870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner rv.DoubleVal = ((double(*)())(intptr_t)FPtr)(); 169d297aea5f24f2ad369162b8c1084cda4dcc839f0Chris Lattner return rv; 170e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner case Type::PointerTyID: 171870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner return PTOGV(((void*(*)())(intptr_t)FPtr)()); 172d297aea5f24f2ad369162b8c1084cda4dcc839f0Chris Lattner } 173ff0f1bb32a439cf82cb09ee29544c894a2bfe877Chris Lattner } 17470975eef572b9e132bbaade16ba9edb76f15f287Brian Gaeke 175cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // Okay, this is not one of our quick and easy cases. Because we don't have a 176cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // full FFI, we have to codegen a nullary stub function that just calls the 177cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // function we are interested in, passing in constants for all of the 178cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // arguments. Make this function and return. 179cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner 180cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // First, create the function. 181cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner FunctionType *STy=FunctionType::get(RetTy, std::vector<const Type*>(), false); 182cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner Function *Stub = new Function(STy, Function::InternalLinkage, "", 183cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner F->getParent()); 184cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner 185cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // Insert a basic block. 186cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner BasicBlock *StubBB = new BasicBlock("", Stub); 187cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner 188cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // Convert all of the GenericValue arguments over to constants. Note that we 189cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // currently don't support varargs. 190cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner std::vector<Value*> Args; 191cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner for (unsigned i = 0, e = ArgValues.size(); i != e; ++i) { 192cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner Constant *C = 0; 193cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner const Type *ArgTy = FTy->getParamType(i); 194cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner const GenericValue &AV = ArgValues[i]; 195cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner switch (ArgTy->getTypeID()) { 196cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner default: assert(0 && "Unknown argument type for function call!"); 197a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer case Type::IntegerTyID: { 198a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer unsigned BitWidth = cast<IntegerType>(ArgTy)->getBitWidth(); 199a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer if (BitWidth == 1) 200a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer C = ConstantInt::get(ArgTy, AV.Int1Val); 201a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 8) 202a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer C = ConstantInt::get(ArgTy, AV.Int8Val); 203a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 16) 204a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer C = ConstantInt::get(ArgTy, AV.Int16Val); 205a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 32) 206a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer C = ConstantInt::get(ArgTy, AV.Int32Val); 207a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 64) 208a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer C = ConstantInt::get(ArgTy, AV.Int64Val); 209a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else 210a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer assert(0 && "Integer types > 64 bits not supported"); 211a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer break; 212a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer } 213b83eb6447ba155342598f0fabe1f08f5baa9164aReid Spencer case Type::FloatTyID: C = ConstantFP ::get(ArgTy, AV.FloatVal); break; 214b83eb6447ba155342598f0fabe1f08f5baa9164aReid Spencer case Type::DoubleTyID: C = ConstantFP ::get(ArgTy, AV.DoubleVal); break; 215cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner case Type::PointerTyID: 216cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner void *ArgPtr = GVTOP(AV); 217cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner if (sizeof(void*) == 4) { 218e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer C = ConstantInt::get(Type::Int32Ty, (int)(intptr_t)ArgPtr); 219cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner } else { 220e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer C = ConstantInt::get(Type::Int64Ty, (intptr_t)ArgPtr); 221cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner } 22215f46d6c280cc91be70c60ed181931fbe0088652Reid Spencer C = ConstantExpr::getIntToPtr(C, ArgTy); // Cast the integer to pointer 223cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner break; 224cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner } 225cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner Args.push_back(C); 226cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner } 227cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner 228a471e045b7cef5da428bdada4a362a4be671ef0bChris Lattner CallInst *TheCall = new CallInst(F, Args, "", StubBB); 229a471e045b7cef5da428bdada4a362a4be671ef0bChris Lattner TheCall->setTailCall(); 230cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner if (TheCall->getType() != Type::VoidTy) 231cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner new ReturnInst(TheCall, StubBB); // Return result of the call. 232cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner else 233cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner new ReturnInst(StubBB); // Just return void. 234cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner 235cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // Finally, return the value returned by our nullary stub function. 236cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner return runFunction(Stub, std::vector<GenericValue>()); 237bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner} 2384d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 2394d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// runJITOnFunction - Run the FunctionPassManager full of 2404d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// just-in-time compilation passes on F, hopefully filling in 2414d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// GlobalAddress[F] with the address of F's machine code. 2424d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// 2434d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattnervoid JIT::runJITOnFunction(Function *F) { 2444d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner static bool isAlreadyCodeGenerating = false; 2454d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner assert(!isAlreadyCodeGenerating && "Error: Recursive compilation detected!"); 24600b16889ab461b7ecef1c91ade101186b7f1fce2Jeff Cohen 247ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer MutexGuard locked(lock); 2484d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 2494d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner // JIT the function 2504d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner isAlreadyCodeGenerating = true; 251ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer state.getPM(locked).run(*F); 2524d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner isAlreadyCodeGenerating = false; 253c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner 254c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // If the function referred to a global variable that had not yet been 255c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // emitted, it allocates memory for the global, but doesn't emit it yet. Emit 256c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // all of these globals now. 257ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer while (!state.getPendingGlobals(locked).empty()) { 258ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer const GlobalVariable *GV = state.getPendingGlobals(locked).back(); 259ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer state.getPendingGlobals(locked).pop_back(); 260c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner EmitGlobalVariable(GV); 261c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner } 2624d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner} 2634d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 2644d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// getPointerToFunction - This method is used to get the address of the 2654d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// specified function, compiling it if neccesary. 2664d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// 2674d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattnervoid *JIT::getPointerToFunction(Function *F) { 268ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer MutexGuard locked(lock); 269ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer 270c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner if (void *Addr = getPointerToGlobalIfAvailable(F)) 271c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner return Addr; // Check if function already code gen'd 2724d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 273fe854034677f59baca1e38075e71f6efca247a03Chris Lattner // Make sure we read in the function if it exists in this Module. 2745c72a3ae106d8d1dd6aa7e573948dac4102aca7bChris Lattner if (F->hasNotBeenReadFromBytecode()) { 275fe854034677f59baca1e38075e71f6efca247a03Chris Lattner // Determine the module provider this function is provided by. 276fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Module *M = F->getParent(); 277fe854034677f59baca1e38075e71f6efca247a03Chris Lattner ModuleProvider *MP = 0; 278fe854034677f59baca1e38075e71f6efca247a03Chris Lattner for (unsigned i = 0, e = Modules.size(); i != e; ++i) { 279fe854034677f59baca1e38075e71f6efca247a03Chris Lattner if (Modules[i]->getModule() == M) { 280fe854034677f59baca1e38075e71f6efca247a03Chris Lattner MP = Modules[i]; 281fe854034677f59baca1e38075e71f6efca247a03Chris Lattner break; 282fe854034677f59baca1e38075e71f6efca247a03Chris Lattner } 283fe854034677f59baca1e38075e71f6efca247a03Chris Lattner } 284fe854034677f59baca1e38075e71f6efca247a03Chris Lattner assert(MP && "Function isn't in a module we know about!"); 285fe854034677f59baca1e38075e71f6efca247a03Chris Lattner 2865c72a3ae106d8d1dd6aa7e573948dac4102aca7bChris Lattner std::string ErrorMsg; 2875c72a3ae106d8d1dd6aa7e573948dac4102aca7bChris Lattner if (MP->materializeFunction(F, &ErrorMsg)) { 288832171cb9724d2d31c8dfb73172e2be8f6dd13eeBill Wendling cerr << "Error reading function '" << F->getName() 289832171cb9724d2d31c8dfb73172e2be8f6dd13eeBill Wendling << "' from bytecode file: " << ErrorMsg << "\n"; 2900050ef831912eea2377c815bc59c09ed828f2684Chris Lattner abort(); 2910050ef831912eea2377c815bc59c09ed828f2684Chris Lattner } 2925c72a3ae106d8d1dd6aa7e573948dac4102aca7bChris Lattner } 2934d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 294c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner if (F->isExternal()) { 295c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner void *Addr = getPointerToNamedFunction(F->getName()); 296c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner addGlobalMapping(F, Addr); 297c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner return Addr; 298c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner } 2994d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 3004d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner runJITOnFunction(F); 301c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner 302c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner void *Addr = getPointerToGlobalIfAvailable(F); 3034d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner assert(Addr && "Code generation didn't add function to GlobalAddress table!"); 3044d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner return Addr; 3054d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner} 3064d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 307c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner/// getOrEmitGlobalVariable - Return the address of the specified global 308c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner/// variable, possibly emitting it to memory if needed. This is used by the 309c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner/// Emitter. 310c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattnervoid *JIT::getOrEmitGlobalVariable(const GlobalVariable *GV) { 311ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer MutexGuard locked(lock); 312ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer 313c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner void *Ptr = getPointerToGlobalIfAvailable(GV); 314c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner if (Ptr) return Ptr; 315c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner 316c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // If the global is external, just remember the address. 317c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner if (GV->isExternal()) { 318c1f400ccddeaacd2bd6c123bb7895be632d82678Chris Lattner#if defined(__APPLE__) && defined(MAC_OS_X_VERSION_10_4) && \ 319c1f400ccddeaacd2bd6c123bb7895be632d82678Chris Lattner ((MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4) || \ 320c1f400ccddeaacd2bd6c123bb7895be632d82678Chris Lattner (MAC_OS_X_VERSION_MIN_REQUIRED == MAC_OS_X_VERSION_10_4 && \ 321c1f400ccddeaacd2bd6c123bb7895be632d82678Chris Lattner __APPLE_CC__ >= 5330)) 322fb9c0d7e317d1320c130ef7a5906f8f2660d5644Evan Cheng // Apple gcc defaults to -fuse-cxa-atexit (i.e. calls __cxa_atexit instead 323fb9c0d7e317d1320c130ef7a5906f8f2660d5644Evan Cheng // of atexit). It passes the address of linker generated symbol __dso_handle 324fb9c0d7e317d1320c130ef7a5906f8f2660d5644Evan Cheng // to the function. 325fb9c0d7e317d1320c130ef7a5906f8f2660d5644Evan Cheng // This configuration change happened at version 5330. 3265f42c550305814f916207b9604b92fbd258e8eafEvan Cheng if (GV->getName() == "__dso_handle") 3275f42c550305814f916207b9604b92fbd258e8eafEvan Cheng return (void*)&__dso_handle; 328b82ab94e20bd48ac149746864e0d5b1653bdcf3eEvan Cheng#endif 329df5a37efc997288da520ff4889443e3560d95387Reid Spencer Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(GV->getName().c_str()); 330c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner if (Ptr == 0) { 331832171cb9724d2d31c8dfb73172e2be8f6dd13eeBill Wendling cerr << "Could not resolve external global address: " 332832171cb9724d2d31c8dfb73172e2be8f6dd13eeBill Wendling << GV->getName() << "\n"; 333c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner abort(); 334c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner } 335c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner } else { 336c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // If the global hasn't been emitted to memory yet, allocate space. We will 337c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // actually initialize the global after current function has finished 338c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // compilation. 339f5d438c1f0e0c0ed44475ab69f03d86a3c818c60Chris Lattner const Type *GlobalType = GV->getType()->getElementType(); 340a69571c7991813c93cba64e88eced6899ce93d81Owen Anderson size_t S = getTargetData()->getTypeSize(GlobalType); 341a69571c7991813c93cba64e88eced6899ce93d81Owen Anderson size_t A = getTargetData()->getTypeAlignment(GlobalType); 342f5d438c1f0e0c0ed44475ab69f03d86a3c818c60Chris Lattner if (A <= 8) { 343f5d438c1f0e0c0ed44475ab69f03d86a3c818c60Chris Lattner Ptr = malloc(S); 344f5d438c1f0e0c0ed44475ab69f03d86a3c818c60Chris Lattner } else { 345f5d438c1f0e0c0ed44475ab69f03d86a3c818c60Chris Lattner // Allocate S+A bytes of memory, then use an aligned pointer within that 346f5d438c1f0e0c0ed44475ab69f03d86a3c818c60Chris Lattner // space. 347f5d438c1f0e0c0ed44475ab69f03d86a3c818c60Chris Lattner Ptr = malloc(S+A); 348f5d438c1f0e0c0ed44475ab69f03d86a3c818c60Chris Lattner unsigned MisAligned = ((intptr_t)Ptr & (A-1)); 34921c39a65201e0f9ed98d399b45fb629fe12a728fChris Lattner Ptr = (char*)Ptr + (MisAligned ? (A-MisAligned) : 0); 350f5d438c1f0e0c0ed44475ab69f03d86a3c818c60Chris Lattner } 351ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer state.getPendingGlobals(locked).push_back(GV); 352c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner } 353c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner addGlobalMapping(GV, Ptr); 354c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner return Ptr; 355c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner} 356c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner 357c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner 3584d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// recompileAndRelinkFunction - This method is used to force a function 3594d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// which has already been compiled, to be compiled again, possibly 3604d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// after it has been modified. Then the entry to the old copy is overwritten 3614d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// with a branch to the new copy. If there was no old copy, this acts 3624d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// just like JIT::getPointerToFunction(). 3634d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// 3644d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattnervoid *JIT::recompileAndRelinkFunction(Function *F) { 365c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner void *OldAddr = getPointerToGlobalIfAvailable(F); 3664d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 367c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // If it's not already compiled there is no reason to patch it up. 368c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner if (OldAddr == 0) { return getPointerToFunction(F); } 3694d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 370c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // Delete the old function mapping. 371c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner addGlobalMapping(F, 0); 372c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner 373c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // Recodegen the function 3744d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner runJITOnFunction(F); 375c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner 376c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // Update state, forward the old function to the new function. 377c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner void *Addr = getPointerToGlobalIfAvailable(F); 3784d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner assert(Addr && "Code generation didn't add function to GlobalAddress table!"); 3794d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner TJI.replaceMachineCodeForFunction(OldAddr, Addr); 3804d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner return Addr; 3814d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner} 382895eddfad43f848d5accce1789aa80be0db459d3Misha Brukman 383