JIT.cpp revision 514ab348fddcdffa8367685dc608b2f8d5de986d
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 11a99be51bf5cdac1438069d4b01766c47704961c8Gabor Greif// execution of LLVM bitcode 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" 303b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov 313b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov#include "llvm/Config/config.h" 323b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov 33c19aadee66b744311afe6e420847e80822a765f2Chris Lattnerusing namespace llvm; 34abb027cf412944db4d27579ba3ae00717d23c25eMisha Brukman 35b76ea74845849e7a499603bb04bfe1614101e910Nate Begeman#ifdef __APPLE__ 363b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov// Apple gcc defaults to -fuse-cxa-atexit (i.e. calls __cxa_atexit instead 373b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov// of atexit). It passes the address of linker generated symbol __dso_handle 383b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov// to the function. 393b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov// This configuration change happened at version 5330. 403b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov# include <AvailabilityMacros.h> 413b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov# if defined(MAC_OS_X_VERSION_10_4) && \ 423b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov ((MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4) || \ 433b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov (MAC_OS_X_VERSION_MIN_REQUIRED == MAC_OS_X_VERSION_10_4 && \ 443b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov __APPLE_CC__ >= 5330)) 453b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov# ifndef HAVE___DSO_HANDLE 463b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov# define HAVE___DSO_HANDLE 1 473b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov# endif 483b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov# endif 495f42c550305814f916207b9604b92fbd258e8eafEvan Cheng#endif 503b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov 513b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov#if HAVE___DSO_HANDLE 523b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikovextern void *__dso_handle __attribute__ ((__visibility__ ("hidden"))); 53b76ea74845849e7a499603bb04bfe1614101e910Nate Begeman#endif 545f42c550305814f916207b9604b92fbd258e8eafEvan Cheng 552fe4bb06c6c40d16b7a5ae9cdf6bb6fe94d51be0Chris Lattnerstatic struct RegisterJIT { 562fe4bb06c6c40d16b7a5ae9cdf6bb6fe94d51be0Chris Lattner RegisterJIT() { JIT::Register(); } 572fe4bb06c6c40d16b7a5ae9cdf6bb6fe94d51be0Chris Lattner} JITRegistrator; 582fe4bb06c6c40d16b7a5ae9cdf6bb6fe94d51be0Chris Lattner 592f51914d828b462b054195e73c75448f24e01979Jeff Cohennamespace llvm { 602f51914d828b462b054195e73c75448f24e01979Jeff Cohen void LinkInJIT() { 612f51914d828b462b054195e73c75448f24e01979Jeff Cohen } 622f51914d828b462b054195e73c75448f24e01979Jeff Cohen} 632f51914d828b462b054195e73c75448f24e01979Jeff Cohen 644d326fa9bea5b80147edf14d1521fc41ce315275Chris LattnerJIT::JIT(ModuleProvider *MP, TargetMachine &tm, TargetJITInfo &tji) 652c639add5f54ba0d0d59771e16d0582f6c59b8beChris Lattner : ExecutionEngine(MP), TM(tm), TJI(tji), jitstate(MP) { 66bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner setTargetData(TM.getTargetData()); 67abb027cf412944db4d27579ba3ae00717d23c25eMisha Brukman 68abb027cf412944db4d27579ba3ae00717d23c25eMisha Brukman // Initialize MCE 69906f5fa5c8bb790201c79a33ea6d906f9f57f827Misha Brukman MCE = createEmitter(*this); 70f976c856fcc5055f3fc7d9f070d72c2d027c1d9dMisha Brukman 7150872d5385463cf1d2e23a758516e7f818e1af24Brian Gaeke // Add target data 72ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer MutexGuard locked(lock); 732c639add5f54ba0d0d59771e16d0582f6c59b8beChris Lattner FunctionPassManager &PM = jitstate.getPM(locked); 74b93b0347d8715e9f2ded1dc56a086f92aeedfb86Chris Lattner PM.add(new TargetData(*TM.getTargetData())); 7550872d5385463cf1d2e23a758516e7f818e1af24Brian Gaeke 764d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner // Turn the machine code intermediate representation into bytes in memory that 774d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner // may be executed. 781911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner if (TM.addPassesToEmitMachineCode(PM, *MCE, false /*fast*/)) { 79832171cb9724d2d31c8dfb73172e2be8f6dd13eeBill Wendling cerr << "Target does not support machine code emission!\n"; 804d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner abort(); 814d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner } 821911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner 831911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner // Initialize passes. 841911fd4f85aebcd4d7b8f27313c5a363eebf49cbChris Lattner PM.doInitialization(); 85bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner} 86bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner 874d326fa9bea5b80147edf14d1521fc41ce315275Chris LattnerJIT::~JIT() { 884d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner delete MCE; 894d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner delete &TM; 904d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner} 914d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 9270975eef572b9e132bbaade16ba9edb76f15f287Brian Gaeke/// run - Start execution with the specified function and arguments. 9305a1a306bcfba2b533dc1210d24924e5f3e9ed0eChris Lattner/// 94ff0f1bb32a439cf82cb09ee29544c894a2bfe877Chris LattnerGenericValue JIT::runFunction(Function *F, 95ff0f1bb32a439cf82cb09ee29544c894a2bfe877Chris Lattner const std::vector<GenericValue> &ArgValues) { 96b47130c580385a5a2c922c480a85438b2bb80293Chris Lattner assert(F && "Function *F was null at entry to run()"); 97b47130c580385a5a2c922c480a85438b2bb80293Chris Lattner 98b47130c580385a5a2c922c480a85438b2bb80293Chris Lattner void *FPtr = getPointerToFunction(F); 997c45d7898bdfdc29a61a58b678e13ed41333ed51Chris Lattner assert(FPtr && "Pointer to fn's code was null after getPointerToFunction"); 100f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner const FunctionType *FTy = F->getFunctionType(); 101e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner const Type *RetTy = FTy->getReturnType(); 102bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner 103e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner assert((FTy->getNumParams() <= ArgValues.size() || FTy->isVarArg()) && 104e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner "Too many arguments passed into function!"); 105e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner assert(FTy->getNumParams() == ArgValues.size() && 106e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner "This doesn't support passing arguments through varargs (yet)!"); 107e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner 108ec8430270a9f1adbf9b790319a1d4781658359fdMisha Brukman // Handle some common cases first. These cases correspond to common `main' 109e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner // prototypes. 11079e038a16d644868bd8d6e230b451c4cb8f8ff93Chris Lattner if (RetTy == Type::Int32Ty || RetTy == Type::VoidTy) { 111f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner switch (ArgValues.size()) { 112f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner case 3: 11379e038a16d644868bd8d6e230b451c4cb8f8ff93Chris Lattner if (FTy->getParamType(0) == Type::Int32Ty && 114f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner isa<PointerType>(FTy->getParamType(1)) && 115f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner isa<PointerType>(FTy->getParamType(2))) { 116f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner int (*PF)(int, char **, const char **) = 117870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner (int(*)(int, char **, const char **))(intptr_t)FPtr; 118ec8430270a9f1adbf9b790319a1d4781658359fdMisha Brukman 119f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner // Call the function. 120e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner GenericValue rv; 12138f6a15df69c271c3bebf648642041b31380e31aReid Spencer rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(), 12238f6a15df69c271c3bebf648642041b31380e31aReid Spencer (char **)GVTOP(ArgValues[1]), 12338f6a15df69c271c3bebf648642041b31380e31aReid Spencer (const char **)GVTOP(ArgValues[2]))); 124f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner return rv; 125f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner } 126f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner break; 127174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner case 2: 12879e038a16d644868bd8d6e230b451c4cb8f8ff93Chris Lattner if (FTy->getParamType(0) == Type::Int32Ty && 129174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner isa<PointerType>(FTy->getParamType(1))) { 130870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner int (*PF)(int, char **) = (int(*)(int, char **))(intptr_t)FPtr; 131ec8430270a9f1adbf9b790319a1d4781658359fdMisha Brukman 132174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner // Call the function. 133174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner GenericValue rv; 13438f6a15df69c271c3bebf648642041b31380e31aReid Spencer rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(), 13538f6a15df69c271c3bebf648642041b31380e31aReid Spencer (char **)GVTOP(ArgValues[1]))); 136174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner return rv; 137174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner } 138174f2264649d9ae062bdb0a038131c2836596be5Chris Lattner break; 139f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner case 1: 140f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner if (FTy->getNumParams() == 1 && 14179e038a16d644868bd8d6e230b451c4cb8f8ff93Chris Lattner FTy->getParamType(0) == Type::Int32Ty) { 142e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner GenericValue rv; 143870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner int (*PF)(int) = (int(*)(int))(intptr_t)FPtr; 14438f6a15df69c271c3bebf648642041b31380e31aReid Spencer rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue())); 145f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner return rv; 146f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner } 147f7bedf447e080cb57c64d6f0cbf6fbeb9f4c596eChris Lattner break; 148e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner } 149e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner } 150e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner 151e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner // Handle cases where no arguments are passed first. 152e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner if (ArgValues.empty()) { 153e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner GenericValue rv; 154e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner switch (RetTy->getTypeID()) { 155e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner default: assert(0 && "Unknown return type for function call!"); 156a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer case Type::IntegerTyID: { 157a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer unsigned BitWidth = cast<IntegerType>(RetTy)->getBitWidth(); 158a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer if (BitWidth == 1) 15938f6a15df69c271c3bebf648642041b31380e31aReid Spencer rv.IntVal = APInt(BitWidth, ((bool(*)())(intptr_t)FPtr)()); 160a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 8) 16138f6a15df69c271c3bebf648642041b31380e31aReid Spencer rv.IntVal = APInt(BitWidth, ((char(*)())(intptr_t)FPtr)()); 162a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 16) 16338f6a15df69c271c3bebf648642041b31380e31aReid Spencer rv.IntVal = APInt(BitWidth, ((short(*)())(intptr_t)FPtr)()); 164a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 32) 16538f6a15df69c271c3bebf648642041b31380e31aReid Spencer rv.IntVal = APInt(BitWidth, ((int(*)())(intptr_t)FPtr)()); 166a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else if (BitWidth <= 64) 16738f6a15df69c271c3bebf648642041b31380e31aReid Spencer rv.IntVal = APInt(BitWidth, ((int64_t(*)())(intptr_t)FPtr)()); 168a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer else 169a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer assert(0 && "Integer types > 64 bits not supported"); 170e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner return rv; 171a54b7cbd452b3adb2f51346140d996b29c2cdb30Reid Spencer } 172e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner case Type::VoidTyID: 17338f6a15df69c271c3bebf648642041b31380e31aReid Spencer rv.IntVal = APInt(32, ((int(*)())(intptr_t)FPtr)()); 174e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner return rv; 175e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner case Type::FloatTyID: 176870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner rv.FloatVal = ((float(*)())(intptr_t)FPtr)(); 177e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner return rv; 178e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner case Type::DoubleTyID: 179870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner rv.DoubleVal = ((double(*)())(intptr_t)FPtr)(); 180d297aea5f24f2ad369162b8c1084cda4dcc839f0Chris Lattner return rv; 1811abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen case Type::X86_FP80TyID: 1821abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen case Type::FP128TyID: 1831abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen case Type::PPC_FP128TyID: 1841abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen assert(0 && "long double not supported yet"); 1851abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen return rv; 186e5eab142a51373dd3bee758ea958575afbfce259Chris Lattner case Type::PointerTyID: 187870286aa33290c00e55ba479a60251c79f3a7911Chris Lattner return PTOGV(((void*(*)())(intptr_t)FPtr)()); 188d297aea5f24f2ad369162b8c1084cda4dcc839f0Chris Lattner } 189ff0f1bb32a439cf82cb09ee29544c894a2bfe877Chris Lattner } 19070975eef572b9e132bbaade16ba9edb76f15f287Brian Gaeke 191cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // Okay, this is not one of our quick and easy cases. Because we don't have a 192cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // full FFI, we have to codegen a nullary stub function that just calls the 193cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // function we are interested in, passing in constants for all of the 194cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // arguments. Make this function and return. 195cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner 196cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // First, create the function. 197cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner FunctionType *STy=FunctionType::get(RetTy, std::vector<const Type*>(), false); 198cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner Function *Stub = new Function(STy, Function::InternalLinkage, "", 199cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner F->getParent()); 200cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner 201cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // Insert a basic block. 202cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner BasicBlock *StubBB = new BasicBlock("", Stub); 203cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner 204cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // Convert all of the GenericValue arguments over to constants. Note that we 205cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // currently don't support varargs. 206990b849abc9481b8c7a482019cd0d95fe2f2a3eaChris Lattner SmallVector<Value*, 8> Args; 207cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner for (unsigned i = 0, e = ArgValues.size(); i != e; ++i) { 208cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner Constant *C = 0; 209cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner const Type *ArgTy = FTy->getParamType(i); 210cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner const GenericValue &AV = ArgValues[i]; 211cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner switch (ArgTy->getTypeID()) { 212cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner default: assert(0 && "Unknown argument type for function call!"); 21338f6a15df69c271c3bebf648642041b31380e31aReid Spencer case Type::IntegerTyID: C = ConstantInt::get(AV.IntVal); break; 21443421b3dd70af5b70e71816521f37502c397cc65Dale Johannesen case Type::FloatTyID: C = ConstantFP ::get(ArgTy, APFloat(AV.FloatVal)); 21543421b3dd70af5b70e71816521f37502c397cc65Dale Johannesen break; 21643421b3dd70af5b70e71816521f37502c397cc65Dale Johannesen case Type::DoubleTyID: C = ConstantFP ::get(ArgTy, APFloat(AV.DoubleVal)); 2171abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen break; 2181abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen case Type::PPC_FP128TyID: 2191abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen case Type::X86_FP80TyID: 2201abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen case Type::FP128TyID: C = ConstantFP ::get(ArgTy, APFloat(AV.IntVal)); 2211abac0d725374cb6e527d2a735a5272a4f7913faDale Johannesen break; 222cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner case Type::PointerTyID: 223cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner void *ArgPtr = GVTOP(AV); 224cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner if (sizeof(void*) == 4) { 225e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer C = ConstantInt::get(Type::Int32Ty, (int)(intptr_t)ArgPtr); 226cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner } else { 227e49661bdf5b7a913d4e368cf511381e524ae403aReid Spencer C = ConstantInt::get(Type::Int64Ty, (intptr_t)ArgPtr); 228cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner } 22915f46d6c280cc91be70c60ed181931fbe0088652Reid Spencer C = ConstantExpr::getIntToPtr(C, ArgTy); // Cast the integer to pointer 230cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner break; 231cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner } 232cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner Args.push_back(C); 233cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner } 234cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner 23552eec548206d0b135b55ba52dd0e82e978f15ae5David Greene CallInst *TheCall = new CallInst(F, Args.begin(), Args.end(), "", StubBB); 236a471e045b7cef5da428bdada4a362a4be671ef0bChris Lattner TheCall->setTailCall(); 237cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner if (TheCall->getType() != Type::VoidTy) 238cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner new ReturnInst(TheCall, StubBB); // Return result of the call. 239cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner else 240cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner new ReturnInst(StubBB); // Just return void. 241cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner 242cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner // Finally, return the value returned by our nullary stub function. 243cc22e9f406cf21e3a2036bf6628ee7a5c850d42cChris Lattner return runFunction(Stub, std::vector<GenericValue>()); 244bd199fb1148b9e16c4e6f3d0ee386c2505a55b71Chris Lattner} 2454d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 2464d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// runJITOnFunction - Run the FunctionPassManager full of 2474d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// just-in-time compilation passes on F, hopefully filling in 2484d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// GlobalAddress[F] with the address of F's machine code. 2494d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// 2504d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattnervoid JIT::runJITOnFunction(Function *F) { 2514d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner static bool isAlreadyCodeGenerating = false; 25200b16889ab461b7ecef1c91ade101186b7f1fce2Jeff Cohen 253ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer MutexGuard locked(lock); 25417f218e001862785c5ba5974a6374f2f7bc29ac0Chris Lattner assert(!isAlreadyCodeGenerating && "Error: Recursive compilation detected!"); 2554d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 2564d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner // JIT the function 2574d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner isAlreadyCodeGenerating = true; 2582c639add5f54ba0d0d59771e16d0582f6c59b8beChris Lattner jitstate.getPM(locked).run(*F); 2594d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner isAlreadyCodeGenerating = false; 260c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner 261c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // If the function referred to a global variable that had not yet been 262c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // emitted, it allocates memory for the global, but doesn't emit it yet. Emit 263c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // all of these globals now. 2642c639add5f54ba0d0d59771e16d0582f6c59b8beChris Lattner while (!jitstate.getPendingGlobals(locked).empty()) { 2652c639add5f54ba0d0d59771e16d0582f6c59b8beChris Lattner const GlobalVariable *GV = jitstate.getPendingGlobals(locked).back(); 2662c639add5f54ba0d0d59771e16d0582f6c59b8beChris Lattner jitstate.getPendingGlobals(locked).pop_back(); 267c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner EmitGlobalVariable(GV); 268c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner } 2694d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner} 2704d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 2714d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// getPointerToFunction - This method is used to get the address of the 2724d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// specified function, compiling it if neccesary. 2734d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner/// 2744d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattnervoid *JIT::getPointerToFunction(Function *F) { 275ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer MutexGuard locked(lock); 276ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer 277c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner if (void *Addr = getPointerToGlobalIfAvailable(F)) 278c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner return Addr; // Check if function already code gen'd 2794d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 280fe854034677f59baca1e38075e71f6efca247a03Chris Lattner // Make sure we read in the function if it exists in this Module. 281a99be51bf5cdac1438069d4b01766c47704961c8Gabor Greif if (F->hasNotBeenReadFromBitcode()) { 282fe854034677f59baca1e38075e71f6efca247a03Chris Lattner // Determine the module provider this function is provided by. 283fe854034677f59baca1e38075e71f6efca247a03Chris Lattner Module *M = F->getParent(); 284fe854034677f59baca1e38075e71f6efca247a03Chris Lattner ModuleProvider *MP = 0; 285fe854034677f59baca1e38075e71f6efca247a03Chris Lattner for (unsigned i = 0, e = Modules.size(); i != e; ++i) { 286fe854034677f59baca1e38075e71f6efca247a03Chris Lattner if (Modules[i]->getModule() == M) { 287fe854034677f59baca1e38075e71f6efca247a03Chris Lattner MP = Modules[i]; 288fe854034677f59baca1e38075e71f6efca247a03Chris Lattner break; 289fe854034677f59baca1e38075e71f6efca247a03Chris Lattner } 290fe854034677f59baca1e38075e71f6efca247a03Chris Lattner } 291fe854034677f59baca1e38075e71f6efca247a03Chris Lattner assert(MP && "Function isn't in a module we know about!"); 292fe854034677f59baca1e38075e71f6efca247a03Chris Lattner 2935c72a3ae106d8d1dd6aa7e573948dac4102aca7bChris Lattner std::string ErrorMsg; 2945c72a3ae106d8d1dd6aa7e573948dac4102aca7bChris Lattner if (MP->materializeFunction(F, &ErrorMsg)) { 295832171cb9724d2d31c8dfb73172e2be8f6dd13eeBill Wendling cerr << "Error reading function '" << F->getName() 296a99be51bf5cdac1438069d4b01766c47704961c8Gabor Greif << "' from bitcode file: " << ErrorMsg << "\n"; 2970050ef831912eea2377c815bc59c09ed828f2684Chris Lattner abort(); 2980050ef831912eea2377c815bc59c09ed828f2684Chris Lattner } 2995c72a3ae106d8d1dd6aa7e573948dac4102aca7bChris Lattner } 3004d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 3015cbf985dcbc89fba3208e7baf8b6f488b06d3ec9Reid Spencer if (F->isDeclaration()) { 302c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner void *Addr = getPointerToNamedFunction(F->getName()); 303c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner addGlobalMapping(F, Addr); 304c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner return Addr; 305c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner } 3064d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 3074d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner runJITOnFunction(F); 308c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner 309c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner void *Addr = getPointerToGlobalIfAvailable(F); 3104d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner assert(Addr && "Code generation didn't add function to GlobalAddress table!"); 3114d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner return Addr; 3124d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner} 3134d326fa9bea5b80147edf14d1521fc41ce315275Chris Lattner 314c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner/// getOrEmitGlobalVariable - Return the address of the specified global 315c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner/// variable, possibly emitting it to memory if needed. This is used by the 316c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner/// Emitter. 317c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattnervoid *JIT::getOrEmitGlobalVariable(const GlobalVariable *GV) { 318ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer MutexGuard locked(lock); 319ee448630bdf7eb6037fe2c50518d32010c433ca3Reid Spencer 320c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner void *Ptr = getPointerToGlobalIfAvailable(GV); 321c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner if (Ptr) return Ptr; 322c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner 323c07ed1387503d25c0b93fcf617f69329d73fc589Chris Lattner // If the global is external, just remember the address. 3245cbf985dcbc89fba3208e7baf8b6f488b06d3ec9Reid Spencer if (GV->isDeclaration()) { 3253b30a6e92d1da79674451879d4112a8f83cc12a4Anton Korobeynikov#if HAVE___DSO_HANDLE 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(); 340514ab348fddcdffa8367685dc608b2f8d5de986dDuncan Sands size_t S = getTargetData()->getABITypeSize(GlobalType); 341d2b7cec527a0efa552628378ebca7a8ca63bb45dChris Lattner size_t A = getTargetData()->getPrefTypeAlignment(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 } 3512c639add5f54ba0d0d59771e16d0582f6c59b8beChris Lattner jitstate.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