mono/mini/mini-llvm-cpp.cpp

   1 //
   2 // mini-llvm-cpp.cpp: C++ support classes for the mono LLVM integration
   3 //
   4 // (C) 2009-2011 Novell, Inc.
   5 // Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
   6 //
   7
   8 //
   9 // We need to override some stuff in LLVM, but this cannot be done using the C
  10 // interface, so we have to use some C++ code here.
  11 // The things which we override are:
  12 // - the default JIT code manager used by LLVM doesn't allocate memory using
  13 //   MAP_32BIT, we require it.
  14 // - add some callbacks so we can obtain the size of methods and their exception
  15 //   tables.
  16 //
  17
  18 //
  19 // Mono's internal header files are not C++ clean, so avoid including them if
  20 // possible
  21 //
  22
  23 #include "config.h"
  24
  25 #include <stdint.h>
  26
  27 #include <llvm/Support/raw_ostream.h>
  28 #include <llvm/Support/Host.h>
  29 #include <llvm/PassManager.h>
  30 #include <llvm/ExecutionEngine/ExecutionEngine.h>
  31 #include <llvm/ExecutionEngine/JITMemoryManager.h>
  32 #include <llvm/ExecutionEngine/JITEventListener.h>
  33 #include <llvm/Target/TargetOptions.h>
  34 #include <llvm/Target/TargetRegisterInfo.h>
  35 #include <llvm/IR/Verifier.h>
  36 #include <llvm/Analysis/Passes.h>
  37 #include <llvm/Transforms/Scalar.h>
  38 #include <llvm/Support/CommandLine.h>
  39 #include "llvm/IR/LegacyPassNameParser.h"
  40 #include "llvm/Support/PrettyStackTrace.h"
  41 #include <llvm/CodeGen/Passes.h>
  42 #include <llvm/CodeGen/MachineFunctionPass.h>
  43 #include <llvm/CodeGen/MachineFunction.h>
  44 #include <llvm/CodeGen/MachineFrameInfo.h>
  45 #include <llvm/IR/Function.h>
  46 #include <llvm/IR/IRBuilder.h>
  47 #include <llvm/IR/Module.h>
  48 //#include <llvm/LinkAllPasses.h>
  49
  50 #include "llvm-c/Core.h"
  51 #include "llvm-c/ExecutionEngine.h"
  52
  53 #include "mini-llvm-cpp.h"
  54
  55 // extern "C" void LLVMInitializeARMTargetInfo();
  56 // extern "C" void LLVMInitializeARMTarget ();
  57 // extern "C" void LLVMInitializeARMTargetMC ();
  58
  59 using namespace llvm;
  60
  61 #ifndef MONO_CROSS_COMPILE
  62
  63 class MonoJITMemoryManager : public JITMemoryManager
  64 {
  65 private:
  66         JITMemoryManager *mm;
  67
  68 public:
  69         /* Callbacks installed by mono */
  70         AllocCodeMemoryCb *alloc_cb;
  71         DlSymCb *dlsym_cb;
  72         ExceptionTableCb *exception_cb;
  73
  74         MonoJITMemoryManager ();
  75         ~MonoJITMemoryManager ();
  76
  77         void setMemoryWritable (void);
  78
  79         void setMemoryExecutable (void);
  80
  81         void AllocateGOT();
  82
  83     unsigned char *getGOTBase() const {
  84                 return mm->getGOTBase ();
  85     }
  86
  87         void setPoisonMemory(bool) {
  88         }
  89
  90         unsigned char *startFunctionBody(const Function *F,
  91                                                                          uintptr_t &ActualSize);
  92
  93         unsigned char *allocateStub(const GlobalValue* F, unsigned StubSize,
  94                                                                  unsigned Alignment);
  95
  96         void endFunctionBody(const Function *F, unsigned char *FunctionStart,
  97                                                  unsigned char *FunctionEnd);
  98
  99         unsigned char *allocateSpace(intptr_t Size, unsigned Alignment);
 100
 101         uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment);
 102
 103         void deallocateMemForFunction(const Function *F);
 104
 105         unsigned char*startExceptionTable(const Function* F,
 106                                                                           uintptr_t &ActualSize);
 107
 108         void endExceptionTable(const Function *F, unsigned char *TableStart,
 109                                                    unsigned char *TableEnd,
 110                                                    unsigned char* FrameRegister);
 111
 112         virtual void deallocateFunctionBody(void*) {
 113         }
 114
 115         virtual void deallocateExceptionTable(void*) {
 116         }
 117
 118         virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment, unsigned SectionID,
 119                                                                                  StringRef SectionName) {
 120                 // FIXME:
 121                 assert(0);
 122                 return NULL;
 123         }
 124
 125         virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment, unsigned SectionID,
 126                                                                                  StringRef SectionName, bool IsReadOnly) {
 127                 // FIXME:
 128                 assert(0);
 129                 return NULL;
 130         }
 131
 132         virtual bool applyPermissions(std::string*) {
 133                 // FIXME:
 134                 assert(0);
 135                 return false;
 136         }
 137
 138         virtual bool finalizeMemory(std::string *ErrMsg = 0) {
 139                 // FIXME:
 140                 assert(0);
 141                 return false;
 142         }
 143
 144         virtual void* getPointerToNamedFunction(const std::string &Name, bool AbortOnFailure) {
 145                 void *res;
 146                 char *err;
 147
 148                 err = dlsym_cb (Name.c_str (), &res);
 149                 if (err) {
 150                         outs () << "Unable to resolve: " << Name << ": " << err << "\n";
 151                         assert(0);
 152                         return NULL;
 153                 }
 154                 return res;
 155         }
 156 };
 157
 158 MonoJITMemoryManager::MonoJITMemoryManager ()
 159 {
 160         mm = JITMemoryManager::CreateDefaultMemManager ();
 161 }
 162
 163 MonoJITMemoryManager::~MonoJITMemoryManager ()
 164 {
 165         delete mm;
 166 }
 167
 168 void
 169 MonoJITMemoryManager::setMemoryWritable (void)
 170 {
 171 }
 172
 173 void
 174 MonoJITMemoryManager::setMemoryExecutable (void)
 175 {
 176 }
 177
 178 void
 179 MonoJITMemoryManager::AllocateGOT()
 180 {
 181         mm->AllocateGOT ();
 182 }
 183
 184 unsigned char *
 185 MonoJITMemoryManager::startFunctionBody(const Function *F,
 186                                         uintptr_t &ActualSize)
 187 {
 188         // FIXME: This leaks memory
 189         if (ActualSize == 0)
 190                 ActualSize = 128;
 191         return alloc_cb (wrap (F), ActualSize);
 192 }
 193
 194 unsigned char *
 195 MonoJITMemoryManager::allocateStub(const GlobalValue* F, unsigned StubSize,
 196                            unsigned Alignment)
 197 {
 198         return alloc_cb (wrap (F), StubSize);
 199 }
 200
 201 void
 202 MonoJITMemoryManager::endFunctionBody(const Function *F, unsigned char *FunctionStart,
 203                                   unsigned char *FunctionEnd)
 204 {
 205 }
 206
 207 unsigned char *
 208 MonoJITMemoryManager::allocateSpace(intptr_t Size, unsigned Alignment)
 209 {
 210         return new unsigned char [Size];
 211 }
 212
 213 uint8_t *
 214 MonoJITMemoryManager::allocateGlobal(uintptr_t Size, unsigned Alignment)
 215 {
 216         return new unsigned char [Size];
 217 }
 218
 219 void
 220 MonoJITMemoryManager::deallocateMemForFunction(const Function *F)
 221 {
 222 }
 223
 224 unsigned char*
 225 MonoJITMemoryManager::startExceptionTable(const Function* F,
 226                                           uintptr_t &ActualSize)
 227 {
 228         return startFunctionBody(F, ActualSize);
 229 }
 230
 231 void
 232 MonoJITMemoryManager::endExceptionTable(const Function *F, unsigned char *TableStart,
 233                                         unsigned char *TableEnd,
 234                                         unsigned char* FrameRegister)
 235 {
 236         exception_cb (FrameRegister);
 237 }
 238
 239 #else
 240
 241 class MonoJITMemoryManager {
 242 };
 243
 244 #endif /* !MONO_CROSS_COMPILE */
 245
 246 class MonoJITEventListener : public JITEventListener {
 247
 248 public:
 249         FunctionEmittedCb *emitted_cb;
 250
 251         MonoJITEventListener (FunctionEmittedCb *cb) {
 252                 emitted_cb = cb;
 253         }
 254
 255         virtual void NotifyFunctionEmitted(const Function &F,
 256                                                                            void *Code, size_t Size,
 257                                                                            const EmittedFunctionDetails &Details) {
 258                 emitted_cb (wrap (&F), Code, (char*)Code + Size);
 259         }
 260 };
 261
 262 class MonoEE {
 263 public:
 264         ExecutionEngine *EE;
 265         MonoJITMemoryManager *mm;
 266         MonoJITEventListener *listener;
 267         FunctionPassManager *fpm;
 268 };
 269
 270 void
 271 mono_llvm_optimize_method (MonoEERef eeref, LLVMValueRef method)
 272 {
 273         MonoEE *mono_ee = (MonoEE*)eeref;
 274
 275         /*
 276          * The verifier does some checks on the whole module, leading to quadratic behavior.
 277          */
 278         //verifyFunction (*(unwrap<Function> (method)));
 279         mono_ee->fpm->run (*unwrap<Function> (method));
 280 }
 281
 282 void
 283 mono_llvm_dump_value (LLVMValueRef value)
 284 {
 285         /* Same as LLVMDumpValue (), but print to stdout */
 286         fflush (stdout);
 287         outs () << (*unwrap<Value> (value));
 288 }
 289
 290 /* Missing overload for building an alloca with an alignment */
 291 LLVMValueRef
 292 mono_llvm_build_alloca (LLVMBuilderRef builder, LLVMTypeRef Ty,
 293                                                 LLVMValueRef ArraySize,
 294                                                 int alignment, const char *Name)
 295 {
 296         return wrap (unwrap (builder)->Insert (new AllocaInst (unwrap (Ty), unwrap (ArraySize), alignment), Name));
 297 }
 298
 299 LLVMValueRef
 300 mono_llvm_build_load (LLVMBuilderRef builder, LLVMValueRef PointerVal,
 301                                           const char *Name, gboolean is_volatile, BarrierKind barrier)
 302 {
 303         LoadInst *ins = unwrap(builder)->CreateLoad(unwrap(PointerVal), is_volatile, Name);
 304
 305         switch (barrier) {
 306         case LLVM_BARRIER_NONE:
 307                 break;
 308         case LLVM_BARRIER_ACQ:
 309                 ins->setOrdering(Acquire);
 310                 break;
 311         case LLVM_BARRIER_SEQ:
 312                 ins->setOrdering(SequentiallyConsistent);
 313                 break;
 314         default:
 315                 g_assert_not_reached ();
 316                 break;
 317         }
 318
 319         return wrap(ins);
 320 }
 321
 322 LLVMValueRef
 323 mono_llvm_build_aligned_load (LLVMBuilderRef builder, LLVMValueRef PointerVal,
 324                                                           const char *Name, gboolean is_volatile, int alignment)
 325 {
 326         LoadInst *ins;
 327
 328         ins = unwrap(builder)->CreateLoad(unwrap(PointerVal), is_volatile, Name);
 329         ins->setAlignment (alignment);
 330
 331         return wrap(ins);
 332 }
 333
 334 LLVMValueRef
 335 mono_llvm_build_store (LLVMBuilderRef builder, LLVMValueRef Val, LLVMValueRef PointerVal,
 336                                           gboolean is_volatile, BarrierKind barrier)
 337 {
 338         StoreInst *ins = unwrap(builder)->CreateStore(unwrap(Val), unwrap(PointerVal), is_volatile);
 339
 340         switch (barrier) {
 341         case LLVM_BARRIER_NONE:
 342                 break;
 343         case LLVM_BARRIER_REL:
 344                 ins->setOrdering(Release);
 345                 break;
 346         case LLVM_BARRIER_SEQ:
 347                 ins->setOrdering(SequentiallyConsistent);
 348                 break;
 349         default:
 350                 g_assert_not_reached ();
 351                 break;
 352         }
 353
 354         return wrap(ins);
 355 }
 356
 357 LLVMValueRef
 358 mono_llvm_build_aligned_store (LLVMBuilderRef builder, LLVMValueRef Val, LLVMValueRef PointerVal,
 359                                                            gboolean is_volatile, int alignment)
 360 {
 361         StoreInst *ins;
 362
 363         ins = unwrap(builder)->CreateStore(unwrap(Val), unwrap(PointerVal), is_volatile);
 364         ins->setAlignment (alignment);
 365
 366         return wrap (ins);
 367 }
 368
 369 LLVMValueRef
 370 mono_llvm_build_cmpxchg (LLVMBuilderRef builder, LLVMValueRef ptr, LLVMValueRef cmp, LLVMValueRef val)
 371 {
 372         AtomicCmpXchgInst *ins;
 373
 374         ins = unwrap(builder)->CreateAtomicCmpXchg (unwrap(ptr), unwrap (cmp), unwrap (val), SequentiallyConsistent, SequentiallyConsistent);
 375         return wrap (ins);
 376 }
 377
 378 LLVMValueRef
 379 mono_llvm_build_atomic_rmw (LLVMBuilderRef builder, AtomicRMWOp op, LLVMValueRef ptr, LLVMValueRef val)
 380 {
 381         AtomicRMWInst::BinOp aop = AtomicRMWInst::Xchg;
 382         AtomicRMWInst *ins;
 383
 384         switch (op) {
 385         case LLVM_ATOMICRMW_OP_XCHG:
 386                 aop = AtomicRMWInst::Xchg;
 387                 break;
 388         case LLVM_ATOMICRMW_OP_ADD:
 389                 aop = AtomicRMWInst::Add;
 390                 break;
 391         default:
 392                 g_assert_not_reached ();
 393                 break;
 394         }
 395
 396         ins = unwrap (builder)->CreateAtomicRMW (aop, unwrap (ptr), unwrap (val), SequentiallyConsistent);
 397         return wrap (ins);
 398 }
 399
 400 LLVMValueRef
 401 mono_llvm_build_fence (LLVMBuilderRef builder, BarrierKind kind)
 402 {
 403         FenceInst *ins;
 404         AtomicOrdering ordering;
 405
 406         g_assert (kind != LLVM_BARRIER_NONE);
 407
 408         switch (kind) {
 409         case LLVM_BARRIER_ACQ:
 410                 ordering = Acquire;
 411                 break;
 412         case LLVM_BARRIER_REL:
 413                 ordering = Release;
 414                 break;
 415         case LLVM_BARRIER_SEQ:
 416                 ordering = SequentiallyConsistent;
 417                 break;
 418         default:
 419                 g_assert_not_reached ();
 420                 break;
 421         }
 422
 423         ins = unwrap (builder)->CreateFence (ordering);
 424         return wrap (ins);
 425 }
 426
 427 void
 428 mono_llvm_replace_uses_of (LLVMValueRef var, LLVMValueRef v)
 429 {
 430         Value *V = ConstantExpr::getTruncOrBitCast (unwrap<Constant> (v), unwrap (var)->getType ());
 431         unwrap (var)->replaceAllUsesWith (V);
 432 }
 433
 434 static cl::list<const PassInfo*, bool, PassNameParser>
 435 PassList(cl::desc("Optimizations available:"));
 436
 437 static void
 438 force_pass_linking (void)
 439 {
 440         // Make sure the rest is linked in, but never executed
 441         if (g_getenv ("FOO") != (char*)-1)
 442                 return;
 443
 444         // This is a subset of the passes in LinkAllPasses.h
 445         // The utility passes and the interprocedural passes are commented out
 446
 447       (void) llvm::createAAEvalPass();
 448       (void) llvm::createAggressiveDCEPass();
 449       (void) llvm::createAliasAnalysisCounterPass();
 450       (void) llvm::createAliasDebugger();
 451           /*
 452       (void) llvm::createArgumentPromotionPass();
 453       (void) llvm::createStructRetPromotionPass();
 454           */
 455       (void) llvm::createBasicAliasAnalysisPass();
 456       (void) llvm::createLibCallAliasAnalysisPass(0);
 457       (void) llvm::createScalarEvolutionAliasAnalysisPass();
 458       //(void) llvm::createBlockPlacementPass();
 459       (void) llvm::createBreakCriticalEdgesPass();
 460       (void) llvm::createCFGSimplificationPass();
 461           /*
 462       (void) llvm::createConstantMergePass();
 463       (void) llvm::createConstantPropagationPass();
 464           */
 465           /*
 466       (void) llvm::createDeadArgEliminationPass();
 467           */
 468       (void) llvm::createDeadCodeEliminationPass();
 469       (void) llvm::createDeadInstEliminationPass();
 470       (void) llvm::createDeadStoreEliminationPass();
 471           /*
 472       (void) llvm::createDeadTypeEliminationPass();
 473       (void) llvm::createDomOnlyPrinterPass();
 474       (void) llvm::createDomPrinterPass();
 475       (void) llvm::createDomOnlyViewerPass();
 476       (void) llvm::createDomViewerPass();
 477       (void) llvm::createEdgeProfilerPass();
 478       (void) llvm::createOptimalEdgeProfilerPass();
 479       (void) llvm::createFunctionInliningPass();
 480       (void) llvm::createAlwaysInlinerPass();
 481       (void) llvm::createGlobalDCEPass();
 482       (void) llvm::createGlobalOptimizerPass();
 483       (void) llvm::createGlobalsModRefPass();
 484       (void) llvm::createIPConstantPropagationPass();
 485       (void) llvm::createIPSCCPPass();
 486           */
 487       (void) llvm::createIndVarSimplifyPass();
 488       (void) llvm::createInstructionCombiningPass();
 489           /*
 490       (void) llvm::createInternalizePass(false);
 491           */
 492       (void) llvm::createLCSSAPass();
 493       (void) llvm::createLICMPass();
 494       (void) llvm::createLazyValueInfoPass();
 495       //(void) llvm::createLoopDependenceAnalysisPass();
 496           /*
 497       (void) llvm::createLoopExtractorPass();
 498           */
 499       (void) llvm::createLoopSimplifyPass();
 500       (void) llvm::createLoopStrengthReducePass();
 501       (void) llvm::createLoopUnrollPass();
 502       (void) llvm::createLoopUnswitchPass();
 503       (void) llvm::createLoopRotatePass();
 504       (void) llvm::createLowerInvokePass();
 505           /*
 506       (void) llvm::createLowerSetJmpPass();
 507           */
 508       (void) llvm::createLowerSwitchPass();
 509       (void) llvm::createNoAAPass();
 510           /*
 511       (void) llvm::createNoProfileInfoPass();
 512       (void) llvm::createProfileEstimatorPass();
 513       (void) llvm::createProfileVerifierPass();
 514       (void) llvm::createProfileLoaderPass();
 515           */
 516       (void) llvm::createPromoteMemoryToRegisterPass();
 517       (void) llvm::createDemoteRegisterToMemoryPass();
 518           /*
 519       (void) llvm::createPruneEHPass();
 520       (void) llvm::createPostDomOnlyPrinterPass();
 521       (void) llvm::createPostDomPrinterPass();
 522       (void) llvm::createPostDomOnlyViewerPass();
 523       (void) llvm::createPostDomViewerPass();
 524           */
 525       (void) llvm::createReassociatePass();
 526       (void) llvm::createSCCPPass();
 527       (void) llvm::createScalarReplAggregatesPass();
 528       //(void) llvm::createSimplifyLibCallsPass();
 529           /*
 530       (void) llvm::createSingleLoopExtractorPass();
 531       (void) llvm::createStripSymbolsPass();
 532       (void) llvm::createStripNonDebugSymbolsPass();
 533       (void) llvm::createStripDeadDebugInfoPass();
 534       (void) llvm::createStripDeadPrototypesPass();
 535       (void) llvm::createTailCallEliminationPass();
 536       (void) llvm::createTailDuplicationPass();
 537       (void) llvm::createJumpThreadingPass();
 538           */
 539           /*
 540       (void) llvm::createUnifyFunctionExitNodesPass();
 541           */
 542       (void) llvm::createInstCountPass();
 543       (void) llvm::createCodeGenPreparePass();
 544       (void) llvm::createGVNPass();
 545       (void) llvm::createMemCpyOptPass();
 546       (void) llvm::createLoopDeletionPass();
 547           /*
 548       (void) llvm::createPostDomTree();
 549       (void) llvm::createPostDomFrontier();
 550       (void) llvm::createInstructionNamerPass();
 551       (void) llvm::createPartialSpecializationPass();
 552       (void) llvm::createFunctionAttrsPass();
 553       (void) llvm::createMergeFunctionsPass();
 554       (void) llvm::createPrintModulePass(0);
 555       (void) llvm::createPrintFunctionPass("", 0);
 556       (void) llvm::createDbgInfoPrinterPass();
 557       (void) llvm::createModuleDebugInfoPrinterPass();
 558       (void) llvm::createPartialInliningPass();
 559       (void) llvm::createGEPSplitterPass();
 560       (void) llvm::createLintPass();
 561           */
 562       (void) llvm::createSinkingPass();
 563 }
 564
 565 #ifndef MONO_CROSS_COMPILE
 566
 567 static gboolean inited;
 568
 569 static void
 570 init_llvm (void)
 571 {
 572         if (inited)
 573                 return;
 574
 575   force_pass_linking ();
 576
 577 #ifdef TARGET_ARM
 578   LLVMInitializeARMTarget ();
 579   LLVMInitializeARMTargetInfo ();
 580   LLVMInitializeARMTargetMC ();
 581 #else
 582   LLVMInitializeX86Target ();
 583   LLVMInitializeX86TargetInfo ();
 584   LLVMInitializeX86TargetMC ();
 585 #endif
 586
 587   PassRegistry &Registry = *PassRegistry::getPassRegistry();
 588   initializeCore(Registry);
 589   initializeScalarOpts(Registry);
 590   initializeAnalysis(Registry);
 591   initializeIPA(Registry);
 592   initializeTransformUtils(Registry);
 593   initializeInstCombine(Registry);
 594   initializeTarget(Registry);
 595
 596   llvm::cl::ParseEnvironmentOptions("mono", "MONO_LLVM", "");
 597
 598   inited = true;
 599 }
 600
 601 MonoEERef
 602 mono_llvm_create_ee (LLVMModuleProviderRef MP, AllocCodeMemoryCb *alloc_cb, FunctionEmittedCb *emitted_cb, ExceptionTableCb *exception_cb, DlSymCb *dlsym_cb, LLVMExecutionEngineRef *ee)
 603 {
 604   std::string Error;
 605   MonoEE *mono_ee;
 606
 607   init_llvm ();
 608
 609   mono_ee = new MonoEE ();
 610
 611   MonoJITMemoryManager *mono_mm = new MonoJITMemoryManager ();
 612   mono_mm->alloc_cb = alloc_cb;
 613   mono_mm->dlsym_cb = dlsym_cb;
 614   mono_mm->exception_cb = exception_cb;
 615   mono_ee->mm = mono_mm;
 616
 617   /*
 618    * The Default code model doesn't seem to work on amd64,
 619    * test_0_fields_with_big_offsets (among others) crashes, because LLVM tries to call
 620    * memset using a normal pcrel code which is in 32bit memory, while memset isn't.
 621    */
 622
 623   TargetOptions opts;
 624   opts.JITExceptionHandling = 1;
 625
 626   StringRef cpu_name = sys::getHostCPUName ();
 627
 628   // EngineBuilder no longer has a copy assignment operator (?)
 629   std::unique_ptr<Module> Owner(unwrap(MP));
 630   EngineBuilder b (std::move(Owner));
 631 #ifdef TARGET_AMD64
 632   ExecutionEngine *EE = b.setJITMemoryManager (mono_mm).setTargetOptions (opts).setAllocateGVsWithCode (true).setMCPU (cpu_name).setCodeModel (CodeModel::Large).create ();
 633 #else
 634   ExecutionEngine *EE = b.setJITMemoryManager (mono_mm).setTargetOptions (opts).setAllocateGVsWithCode (true).setMCPU (cpu_name).create ();
 635 #endif
 636
 637   g_assert (EE);
 638   mono_ee->EE = EE;
 639
 640   MonoJITEventListener *listener = new MonoJITEventListener (emitted_cb);
 641   EE->RegisterJITEventListener (listener);
 642   mono_ee->listener = listener;
 643
 644   FunctionPassManager *fpm = new FunctionPassManager (unwrap (MP));
 645   mono_ee->fpm = fpm;
 646
 647   fpm->add(new DataLayoutPass(*EE->getDataLayout()));
 648
 649   if (PassList.size() > 0) {
 650           /* Use the passes specified by the env variable */
 651           /* Only the passes in force_pass_linking () can be used */
 652           for (unsigned i = 0; i < PassList.size(); ++i) {
 653                   const PassInfo *PassInf = PassList[i];
 654                   Pass *P = 0;
 655
 656                   if (PassInf->getNormalCtor())
 657                           P = PassInf->getNormalCtor()();
 658                   fpm->add (P);
 659           }
 660   } else {
 661           /* Use the same passes used by 'opt' by default, without the ipo passes */
 662           const char *opts = "-simplifycfg -domtree -domfrontier -scalarrepl -instcombine -simplifycfg -domtree -domfrontier -scalarrepl -instcombine -simplifycfg -instcombine -simplifycfg -reassociate -domtree -loops -loop-simplify -domfrontier -loop-simplify -lcssa -loop-rotate -licm -lcssa -loop-unswitch -instcombine -scalar-evolution -loop-simplify -lcssa -iv-users -indvars -loop-deletion -loop-simplify -lcssa -loop-unroll -instcombine -memdep -gvn -memdep -memcpyopt -sccp -instcombine -domtree -memdep -dse -adce -gvn -simplifycfg";
 663           char **args;
 664           int i;
 665
 666           args = g_strsplit (opts, " ", 1000);
 667           for (i = 0; args [i]; i++)
 668                   ;
 669           llvm::cl::ParseCommandLineOptions (i, args, "");
 670           g_strfreev (args);
 671
 672           for (unsigned i = 0; i < PassList.size(); ++i) {
 673                   const PassInfo *PassInf = PassList[i];
 674                   Pass *P = 0;
 675
 676                   if (PassInf->getNormalCtor())
 677                           P = PassInf->getNormalCtor()();
 678                   g_assert (P->getPassKind () == llvm::PT_Function || P->getPassKind () == llvm::PT_Loop);
 679                   fpm->add (P);
 680           }
 681
 682           /*
 683           fpm->add(createInstructionCombiningPass());
 684           fpm->add(createReassociatePass());
 685           fpm->add(createGVNPass());
 686           fpm->add(createCFGSimplificationPass());
 687           */
 688   }
 689
 690   *ee = wrap (EE);
 691
 692   return mono_ee;
 693 }
 694
 695 void
 696 mono_llvm_dispose_ee (MonoEERef *eeref)
 697 {
 698         MonoEE *mono_ee = (MonoEE*)eeref;
 699
 700         delete mono_ee->EE;
 701         delete mono_ee->fpm;
 702         //delete mono_ee->mm;
 703         delete mono_ee->listener;
 704         delete mono_ee;
 705 }
 706
 707 #else
 708
 709 MonoEERef
 710 mono_llvm_create_ee (LLVMModuleProviderRef MP, AllocCodeMemoryCb *alloc_cb, FunctionEmittedCb *emitted_cb, ExceptionTableCb *exception_cb, DlSymCb *dlsym_cb, LLVMExecutionEngineRef *ee)
 711 {
 712         g_assert_not_reached ();
 713         return NULL;
 714 }
 715
 716 void
 717 mono_llvm_dispose_ee (MonoEERef *eeref)
 718 {
 719         g_assert_not_reached ();
 720 }
 721
 722 /* Not linked in */
 723 void
 724 LLVMAddGlobalMapping(LLVMExecutionEngineRef EE, LLVMValueRef Global,
 725                                          void* Addr)
 726 {
 727         g_assert_not_reached ();
 728 }
 729
 730 void*
 731 LLVMGetPointerToGlobal(LLVMExecutionEngineRef EE, LLVMValueRef Global)
 732 {
 733         g_assert_not_reached ();
 734         return NULL;
 735 }
 736
 737 #endif /* !MONO_CROSS_COMPILE */