lib/Transforms/IPO/PassManagerBuilder.cpp

   1 //===- PassManagerBuilder.cpp - Build Standard Pass -----------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file defines the PassManagerBuilder class, which is used to set up a
  11 // "standard" optimization sequence suitable for languages like C and C++.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15
  16 #include "llvm/Transforms/IPO/PassManagerBuilder.h"
  17 #include "llvm-c/Transforms/PassManagerBuilder.h"
  18 #include "llvm/ADT/SmallVector.h"
  19 #include "llvm/Analysis/Passes.h"
  20 #include "llvm/IR/DataLayout.h"
  21 #include "llvm/IR/Verifier.h"
  22 #include "llvm/PassManager.h"
  23 #include "llvm/Support/CommandLine.h"
  24 #include "llvm/Support/ManagedStatic.h"
  25 #include "llvm/Target/TargetLibraryInfo.h"
  26 #include "llvm/Target/TargetMachine.h"
  27 #include "llvm/Target/TargetSubtargetInfo.h"
  28 #include "llvm/Transforms/IPO.h"
  29 #include "llvm/Transforms/Scalar.h"
  30 #include "llvm/Transforms/Vectorize.h"
  31
  32 using namespace llvm;
  33
  34 static cl::opt<bool>
  35 RunLoopVectorization("vectorize-loops", cl::Hidden,
  36                      cl::desc("Run the Loop vectorization passes"));
  37
  38 static cl::opt<bool>
  39 RunSLPVectorization("vectorize-slp", cl::Hidden,
  40                     cl::desc("Run the SLP vectorization passes"));
  41
  42 static cl::opt<bool>
  43 RunBBVectorization("vectorize-slp-aggressive", cl::Hidden,
  44                     cl::desc("Run the BB vectorization passes"));
  45
  46 static cl::opt<bool>
  47 UseGVNAfterVectorization("use-gvn-after-vectorization",
  48   cl::init(false), cl::Hidden,
  49   cl::desc("Run GVN instead of Early CSE after vectorization passes"));
  50
  51 static cl::opt<bool> ExtraVectorizerPasses(
  52     "extra-vectorizer-passes", cl::init(false), cl::Hidden,
  53     cl::desc("Run cleanup optimization passes after vectorization."));
  54
  55 static cl::opt<bool> UseNewSROA("use-new-sroa",
  56   cl::init(true), cl::Hidden,
  57   cl::desc("Enable the new, experimental SROA pass"));
  58
  59 static cl::opt<bool>
  60 RunLoopRerolling("reroll-loops", cl::Hidden,
  61                  cl::desc("Run the loop rerolling pass"));
  62
  63 static cl::opt<bool> RunLoadCombine("combine-loads", cl::init(false),
  64                                     cl::Hidden,
  65                                     cl::desc("Run the load combining pass"));
  66
  67 static cl::opt<bool>
  68 RunSLPAfterLoopVectorization("run-slp-after-loop-vectorization",
  69   cl::init(true), cl::Hidden,
  70   cl::desc("Run the SLP vectorizer (and BB vectorizer) after the Loop "
  71            "vectorizer instead of before"));
  72
  73 static cl::opt<bool> UseCFLAA("use-cfl-aa",
  74   cl::init(false), cl::Hidden,
  75   cl::desc("Enable the new, experimental CFL alias analysis"));
  76
  77 static cl::opt<bool>
  78 EnableMLSM("mlsm", cl::init(true), cl::Hidden,
  79            cl::desc("Enable motion of merged load and store"));
  80
  81 PassManagerBuilder::PassManagerBuilder() {
  82     OptLevel = 2;
  83     SizeLevel = 0;
  84     LibraryInfo = nullptr;
  85     Inliner = nullptr;
  86     DisableTailCalls = false;
  87     DisableUnitAtATime = false;
  88     DisableUnrollLoops = false;
  89     BBVectorize = RunBBVectorization;
  90     SLPVectorize = RunSLPVectorization;
  91     LoopVectorize = RunLoopVectorization;
  92     RerollLoops = RunLoopRerolling;
  93     LoadCombine = RunLoadCombine;
  94     DisableGVNLoadPRE = false;
  95     VerifyInput = false;
  96     VerifyOutput = false;
  97     StripDebug = false;
  98     MergeFunctions = false;
  99 }
 100
 101 PassManagerBuilder::~PassManagerBuilder() {
 102   delete LibraryInfo;
 103   delete Inliner;
 104 }
 105
 106 /// Set of global extensions, automatically added as part of the standard set.
 107 static ManagedStatic<SmallVector<std::pair<PassManagerBuilder::ExtensionPointTy,
 108    PassManagerBuilder::ExtensionFn>, 8> > GlobalExtensions;
 109
 110 void PassManagerBuilder::addGlobalExtension(
 111     PassManagerBuilder::ExtensionPointTy Ty,
 112     PassManagerBuilder::ExtensionFn Fn) {
 113   GlobalExtensions->push_back(std::make_pair(Ty, Fn));
 114 }
 115
 116 void PassManagerBuilder::addExtension(ExtensionPointTy Ty, ExtensionFn Fn) {
 117   Extensions.push_back(std::make_pair(Ty, Fn));
 118 }
 119
 120 void PassManagerBuilder::addExtensionsToPM(ExtensionPointTy ETy,
 121                                            PassManagerBase &PM) const {
 122   for (unsigned i = 0, e = GlobalExtensions->size(); i != e; ++i)
 123     if ((*GlobalExtensions)[i].first == ETy)
 124       (*GlobalExtensions)[i].second(*this, PM);
 125   for (unsigned i = 0, e = Extensions.size(); i != e; ++i)
 126     if (Extensions[i].first == ETy)
 127       Extensions[i].second(*this, PM);
 128 }
 129
 130 void
 131 PassManagerBuilder::addInitialAliasAnalysisPasses(PassManagerBase &PM) const {
 132   // Add TypeBasedAliasAnalysis before BasicAliasAnalysis so that
 133   // BasicAliasAnalysis wins if they disagree. This is intended to help
 134   // support "obvious" type-punning idioms.
 135   if (UseCFLAA)
 136     PM.add(createCFLAliasAnalysisPass());
 137   PM.add(createTypeBasedAliasAnalysisPass());
 138   PM.add(createScopedNoAliasAAPass());
 139   PM.add(createBasicAliasAnalysisPass());
 140 }
 141
 142 void PassManagerBuilder::populateFunctionPassManager(FunctionPassManager &FPM) {
 143   addExtensionsToPM(EP_EarlyAsPossible, FPM);
 144
 145   // Add LibraryInfo if we have some.
 146   if (LibraryInfo) FPM.add(new TargetLibraryInfo(*LibraryInfo));
 147
 148   if (OptLevel == 0) return;
 149
 150   addInitialAliasAnalysisPasses(FPM);
 151
 152   FPM.add(createCFGSimplificationPass());
 153   if (UseNewSROA)
 154     FPM.add(createSROAPass());
 155   else
 156     FPM.add(createScalarReplAggregatesPass());
 157   FPM.add(createEarlyCSEPass());
 158   FPM.add(createLowerExpectIntrinsicPass());
 159 }
 160
 161 void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
 162   // If all optimizations are disabled, just run the always-inline pass.
 163   if (OptLevel == 0) {
 164     if (Inliner) {
 165       MPM.add(Inliner);
 166       Inliner = nullptr;
 167     }
 168
 169     // FIXME: This is a HACK! The inliner pass above implicitly creates a CGSCC
 170     // pass manager, but we don't want to add extensions into that pass manager.
 171     // To prevent this we must insert a no-op module pass to reset the pass
 172     // manager to get the same behavior as EP_OptimizerLast in non-O0 builds.
 173     if (!GlobalExtensions->empty() || !Extensions.empty())
 174       MPM.add(createBarrierNoopPass());
 175
 176     addExtensionsToPM(EP_EnabledOnOptLevel0, MPM);
 177     return;
 178   }
 179
 180   // Add LibraryInfo if we have some.
 181   if (LibraryInfo) MPM.add(new TargetLibraryInfo(*LibraryInfo));
 182
 183   addInitialAliasAnalysisPasses(MPM);
 184
 185   if (!DisableUnitAtATime) {
 186     addExtensionsToPM(EP_ModuleOptimizerEarly, MPM);
 187
 188     MPM.add(createIPSCCPPass());              // IP SCCP
 189     MPM.add(createGlobalOptimizerPass());     // Optimize out global vars
 190
 191     MPM.add(createDeadArgEliminationPass());  // Dead argument elimination
 192
 193     MPM.add(createInstructionCombiningPass());// Clean up after IPCP & DAE
 194     addExtensionsToPM(EP_Peephole, MPM);
 195     MPM.add(createCFGSimplificationPass());   // Clean up after IPCP & DAE
 196   }
 197
 198   // Start of CallGraph SCC passes.
 199   if (!DisableUnitAtATime)
 200     MPM.add(createPruneEHPass());             // Remove dead EH info
 201   if (Inliner) {
 202     MPM.add(Inliner);
 203     Inliner = nullptr;
 204   }
 205   if (!DisableUnitAtATime)
 206     MPM.add(createFunctionAttrsPass());       // Set readonly/readnone attrs
 207   if (OptLevel > 2)
 208     MPM.add(createArgumentPromotionPass());   // Scalarize uninlined fn args
 209
 210   // Start of function pass.
 211   // Break up aggregate allocas, using SSAUpdater.
 212   if (UseNewSROA)
 213     MPM.add(createSROAPass(/*RequiresDomTree*/ false));
 214   else
 215     MPM.add(createScalarReplAggregatesPass(-1, false));
 216   MPM.add(createEarlyCSEPass());              // Catch trivial redundancies
 217   MPM.add(createJumpThreadingPass());         // Thread jumps.
 218   MPM.add(createCorrelatedValuePropagationPass()); // Propagate conditionals
 219   MPM.add(createCFGSimplificationPass());     // Merge & remove BBs
 220   MPM.add(createInstructionCombiningPass());  // Combine silly seq's
 221   addExtensionsToPM(EP_Peephole, MPM);
 222
 223   if (!DisableTailCalls)
 224     MPM.add(createTailCallEliminationPass()); // Eliminate tail calls
 225   MPM.add(createCFGSimplificationPass());     // Merge & remove BBs
 226   MPM.add(createReassociatePass());           // Reassociate expressions
 227   MPM.add(createLoopRotatePass());            // Rotate Loop
 228   MPM.add(createLICMPass());                  // Hoist loop invariants
 229   MPM.add(createLoopUnswitchPass(SizeLevel || OptLevel < 3));
 230   MPM.add(createInstructionCombiningPass());
 231   MPM.add(createIndVarSimplifyPass());        // Canonicalize indvars
 232   MPM.add(createLoopIdiomPass());             // Recognize idioms like memset.
 233   MPM.add(createLoopDeletionPass());          // Delete dead loops
 234
 235   if (!DisableUnrollLoops)
 236     MPM.add(createSimpleLoopUnrollPass());    // Unroll small loops
 237   addExtensionsToPM(EP_LoopOptimizerEnd, MPM);
 238
 239   if (OptLevel > 1) {
 240     if (EnableMLSM)
 241       MPM.add(createMergedLoadStoreMotionPass()); // Merge ld/st in diamonds
 242     MPM.add(createGVNPass(DisableGVNLoadPRE));  // Remove redundancies
 243   }
 244   MPM.add(createMemCpyOptPass());             // Remove memcpy / form memset
 245   MPM.add(createSCCPPass());                  // Constant prop with SCCP
 246
 247   // Run instcombine after redundancy elimination to exploit opportunities
 248   // opened up by them.
 249   MPM.add(createInstructionCombiningPass());
 250   addExtensionsToPM(EP_Peephole, MPM);
 251   MPM.add(createJumpThreadingPass());         // Thread jumps
 252   MPM.add(createCorrelatedValuePropagationPass());
 253   MPM.add(createDeadStoreEliminationPass());  // Delete dead stores
 254
 255   addExtensionsToPM(EP_ScalarOptimizerLate, MPM);
 256
 257   if (RerollLoops)
 258     MPM.add(createLoopRerollPass());
 259   if (!RunSLPAfterLoopVectorization) {
 260     if (SLPVectorize)
 261       MPM.add(createSLPVectorizerPass());   // Vectorize parallel scalar chains.
 262
 263     if (BBVectorize) {
 264       MPM.add(createBBVectorizePass());
 265       MPM.add(createInstructionCombiningPass());
 266       addExtensionsToPM(EP_Peephole, MPM);
 267       if (OptLevel > 1 && UseGVNAfterVectorization)
 268         MPM.add(createGVNPass(DisableGVNLoadPRE)); // Remove redundancies
 269       else
 270         MPM.add(createEarlyCSEPass());      // Catch trivial redundancies
 271
 272       // BBVectorize may have significantly shortened a loop body; unroll again.
 273       if (!DisableUnrollLoops)
 274         MPM.add(createLoopUnrollPass());
 275     }
 276   }
 277
 278   if (LoadCombine)
 279     MPM.add(createLoadCombinePass());
 280
 281   MPM.add(createAggressiveDCEPass());         // Delete dead instructions
 282   MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
 283   MPM.add(createInstructionCombiningPass());  // Clean up after everything.
 284   addExtensionsToPM(EP_Peephole, MPM);
 285
 286   // FIXME: This is a HACK! The inliner pass above implicitly creates a CGSCC
 287   // pass manager that we are specifically trying to avoid. To prevent this
 288   // we must insert a no-op module pass to reset the pass manager.
 289   MPM.add(createBarrierNoopPass());
 290
 291   // Re-rotate loops in all our loop nests. These may have fallout out of
 292   // rotated form due to GVN or other transformations, and the vectorizer relies
 293   // on the rotated form.
 294   if (ExtraVectorizerPasses)
 295     MPM.add(createLoopRotatePass());
 296
 297   MPM.add(createLoopVectorizePass(DisableUnrollLoops, LoopVectorize));
 298   // FIXME: Because of #pragma vectorize enable, the passes below are always
 299   // inserted in the pipeline, even when the vectorizer doesn't run (ex. when
 300   // on -O1 and no #pragma is found). Would be good to have these two passes
 301   // as function calls, so that we can only pass them when the vectorizer
 302   // changed the code.
 303   MPM.add(createInstructionCombiningPass());
 304   if (OptLevel > 1 && ExtraVectorizerPasses) {
 305     // At higher optimization levels, try to clean up any runtime overlap and
 306     // alignment checks inserted by the vectorizer. We want to track correllated
 307     // runtime checks for two inner loops in the same outer loop, fold any
 308     // common computations, hoist loop-invariant aspects out of any outer loop,
 309     // and unswitch the runtime checks if possible. Once hoisted, we may have
 310     // dead (or speculatable) control flows or more combining opportunities.
 311     MPM.add(createEarlyCSEPass());
 312     MPM.add(createCorrelatedValuePropagationPass());
 313     MPM.add(createInstructionCombiningPass());
 314     MPM.add(createLICMPass());
 315     MPM.add(createLoopUnswitchPass(SizeLevel || OptLevel < 3));
 316     MPM.add(createCFGSimplificationPass());
 317     MPM.add(createInstructionCombiningPass());
 318   }
 319
 320   if (RunSLPAfterLoopVectorization) {
 321     if (SLPVectorize) {
 322       MPM.add(createSLPVectorizerPass());   // Vectorize parallel scalar chains.
 323       if (OptLevel > 1 && ExtraVectorizerPasses) {
 324         MPM.add(createEarlyCSEPass());
 325       }
 326     }
 327
 328     if (BBVectorize) {
 329       MPM.add(createBBVectorizePass());
 330       MPM.add(createInstructionCombiningPass());
 331       addExtensionsToPM(EP_Peephole, MPM);
 332       if (OptLevel > 1 && UseGVNAfterVectorization)
 333         MPM.add(createGVNPass(DisableGVNLoadPRE)); // Remove redundancies
 334       else
 335         MPM.add(createEarlyCSEPass());      // Catch trivial redundancies
 336
 337       // BBVectorize may have significantly shortened a loop body; unroll again.
 338       if (!DisableUnrollLoops)
 339         MPM.add(createLoopUnrollPass());
 340     }
 341   }
 342
 343   addExtensionsToPM(EP_Peephole, MPM);
 344   MPM.add(createCFGSimplificationPass());
 345   MPM.add(createInstructionCombiningPass());
 346
 347   if (!DisableUnrollLoops)
 348     MPM.add(createLoopUnrollPass());    // Unroll small loops
 349
 350   // After vectorization and unrolling, assume intrinsics may tell us more
 351   // about pointer alignments.
 352   MPM.add(createAlignmentFromAssumptionsPass());
 353
 354   if (!DisableUnitAtATime) {
 355     // FIXME: We shouldn't bother with this anymore.
 356     MPM.add(createStripDeadPrototypesPass()); // Get rid of dead prototypes
 357
 358     // GlobalOpt already deletes dead functions and globals, at -O2 try a
 359     // late pass of GlobalDCE.  It is capable of deleting dead cycles.
 360     if (OptLevel > 1) {
 361       MPM.add(createGlobalDCEPass());         // Remove dead fns and globals.
 362       MPM.add(createConstantMergePass());     // Merge dup global constants
 363     }
 364   }
 365
 366   if (MergeFunctions)
 367     MPM.add(createMergeFunctionsPass());
 368
 369   addExtensionsToPM(EP_OptimizerLast, MPM);
 370 }
 371
 372 void PassManagerBuilder::addLTOOptimizationPasses(PassManagerBase &PM) {
 373   // Provide AliasAnalysis services for optimizations.
 374   addInitialAliasAnalysisPasses(PM);
 375
 376   // Propagate constants at call sites into the functions they call.  This
 377   // opens opportunities for globalopt (and inlining) by substituting function
 378   // pointers passed as arguments to direct uses of functions.
 379   PM.add(createIPSCCPPass());
 380
 381   // Now that we internalized some globals, see if we can hack on them!
 382   PM.add(createGlobalOptimizerPass());
 383
 384   // Linking modules together can lead to duplicated global constants, only
 385   // keep one copy of each constant.
 386   PM.add(createConstantMergePass());
 387
 388   // Remove unused arguments from functions.
 389   PM.add(createDeadArgEliminationPass());
 390
 391   // Reduce the code after globalopt and ipsccp.  Both can open up significant
 392   // simplification opportunities, and both can propagate functions through
 393   // function pointers.  When this happens, we often have to resolve varargs
 394   // calls, etc, so let instcombine do this.
 395   PM.add(createInstructionCombiningPass());
 396   addExtensionsToPM(EP_Peephole, PM);
 397
 398   // Inline small functions
 399   bool RunInliner = Inliner;
 400   if (RunInliner) {
 401     PM.add(Inliner);
 402     Inliner = nullptr;
 403   }
 404
 405   PM.add(createPruneEHPass());   // Remove dead EH info.
 406
 407   // Optimize globals again if we ran the inliner.
 408   if (RunInliner)
 409     PM.add(createGlobalOptimizerPass());
 410   PM.add(createGlobalDCEPass()); // Remove dead functions.
 411
 412   // If we didn't decide to inline a function, check to see if we can
 413   // transform it to pass arguments by value instead of by reference.
 414   PM.add(createArgumentPromotionPass());
 415
 416   // The IPO passes may leave cruft around.  Clean up after them.
 417   PM.add(createInstructionCombiningPass());
 418   addExtensionsToPM(EP_Peephole, PM);
 419   PM.add(createJumpThreadingPass());
 420
 421   // Break up allocas
 422   if (UseNewSROA)
 423     PM.add(createSROAPass());
 424   else
 425     PM.add(createScalarReplAggregatesPass());
 426
 427   // Run a few AA driven optimizations here and now, to cleanup the code.
 428   PM.add(createFunctionAttrsPass()); // Add nocapture.
 429   PM.add(createGlobalsModRefPass()); // IP alias analysis.
 430
 431   PM.add(createLICMPass());                 // Hoist loop invariants.
 432   if (EnableMLSM)
 433     PM.add(createMergedLoadStoreMotionPass()); // Merge ld/st in diamonds.
 434   PM.add(createGVNPass(DisableGVNLoadPRE)); // Remove redundancies.
 435   PM.add(createMemCpyOptPass());            // Remove dead memcpys.
 436
 437   // Nuke dead stores.
 438   PM.add(createDeadStoreEliminationPass());
 439
 440   // More loops are countable; try to optimize them.
 441   PM.add(createIndVarSimplifyPass());
 442   PM.add(createLoopDeletionPass());
 443   PM.add(createLoopVectorizePass(DisableUnrollLoops, LoopVectorize));
 444
 445   // More scalar chains could be vectorized due to more alias information
 446   if (RunSLPAfterLoopVectorization)
 447     if (SLPVectorize)
 448       PM.add(createSLPVectorizerPass()); // Vectorize parallel scalar chains.
 449
 450   // After vectorization, assume intrinsics may tell us more about pointer
 451   // alignments.
 452   PM.add(createAlignmentFromAssumptionsPass());
 453
 454   if (LoadCombine)
 455     PM.add(createLoadCombinePass());
 456
 457   // Cleanup and simplify the code after the scalar optimizations.
 458   PM.add(createInstructionCombiningPass());
 459   addExtensionsToPM(EP_Peephole, PM);
 460
 461   PM.add(createJumpThreadingPass());
 462
 463   // Delete basic blocks, which optimization passes may have killed.
 464   PM.add(createCFGSimplificationPass());
 465
 466   // Now that we have optimized the program, discard unreachable functions.
 467   PM.add(createGlobalDCEPass());
 468
 469   // FIXME: this is profitable (for compiler time) to do at -O0 too, but
 470   // currently it damages debug info.
 471   if (MergeFunctions)
 472     PM.add(createMergeFunctionsPass());
 473 }
 474
 475 void PassManagerBuilder::populateLTOPassManager(PassManagerBase &PM,
 476                                                 TargetMachine *TM) {
 477   if (TM) {
 478     PM.add(new DataLayoutPass());
 479     TM->addAnalysisPasses(PM);
 480   }
 481
 482   if (LibraryInfo)
 483     PM.add(new TargetLibraryInfo(*LibraryInfo));
 484
 485   if (VerifyInput)
 486     PM.add(createVerifierPass());
 487
 488   if (StripDebug)
 489     PM.add(createStripSymbolsPass(true));
 490
 491   if (VerifyInput)
 492     PM.add(createDebugInfoVerifierPass());
 493
 494   if (OptLevel != 0)
 495     addLTOOptimizationPasses(PM);
 496
 497   if (VerifyOutput) {
 498     PM.add(createVerifierPass());
 499     PM.add(createDebugInfoVerifierPass());
 500   }
 501 }
 502
 503 inline PassManagerBuilder *unwrap(LLVMPassManagerBuilderRef P) {
 504     return reinterpret_cast<PassManagerBuilder*>(P);
 505 }
 506
 507 inline LLVMPassManagerBuilderRef wrap(PassManagerBuilder *P) {
 508   return reinterpret_cast<LLVMPassManagerBuilderRef>(P);
 509 }
 510
 511 LLVMPassManagerBuilderRef LLVMPassManagerBuilderCreate() {
 512   PassManagerBuilder *PMB = new PassManagerBuilder();
 513   return wrap(PMB);
 514 }
 515
 516 void LLVMPassManagerBuilderDispose(LLVMPassManagerBuilderRef PMB) {
 517   PassManagerBuilder *Builder = unwrap(PMB);
 518   delete Builder;
 519 }
 520
 521 void
 522 LLVMPassManagerBuilderSetOptLevel(LLVMPassManagerBuilderRef PMB,
 523                                   unsigned OptLevel) {
 524   PassManagerBuilder *Builder = unwrap(PMB);
 525   Builder->OptLevel = OptLevel;
 526 }
 527
 528 void
 529 LLVMPassManagerBuilderSetSizeLevel(LLVMPassManagerBuilderRef PMB,
 530                                    unsigned SizeLevel) {
 531   PassManagerBuilder *Builder = unwrap(PMB);
 532   Builder->SizeLevel = SizeLevel;
 533 }
 534
 535 void
 536 LLVMPassManagerBuilderSetDisableUnitAtATime(LLVMPassManagerBuilderRef PMB,
 537                                             LLVMBool Value) {
 538   PassManagerBuilder *Builder = unwrap(PMB);
 539   Builder->DisableUnitAtATime = Value;
 540 }
 541
 542 void
 543 LLVMPassManagerBuilderSetDisableUnrollLoops(LLVMPassManagerBuilderRef PMB,
 544                                             LLVMBool Value) {
 545   PassManagerBuilder *Builder = unwrap(PMB);
 546   Builder->DisableUnrollLoops = Value;
 547 }
 548
 549 void
 550 LLVMPassManagerBuilderSetDisableSimplifyLibCalls(LLVMPassManagerBuilderRef PMB,
 551                                                  LLVMBool Value) {
 552   // NOTE: The simplify-libcalls pass has been removed.
 553 }
 554
 555 void
 556 LLVMPassManagerBuilderUseInlinerWithThreshold(LLVMPassManagerBuilderRef PMB,
 557                                               unsigned Threshold) {
 558   PassManagerBuilder *Builder = unwrap(PMB);
 559   Builder->Inliner = createFunctionInliningPass(Threshold);
 560 }
 561
 562 void
 563 LLVMPassManagerBuilderPopulateFunctionPassManager(LLVMPassManagerBuilderRef PMB,
 564                                                   LLVMPassManagerRef PM) {
 565   PassManagerBuilder *Builder = unwrap(PMB);
 566   FunctionPassManager *FPM = unwrap<FunctionPassManager>(PM);
 567   Builder->populateFunctionPassManager(*FPM);
 568 }
 569
 570 void
 571 LLVMPassManagerBuilderPopulateModulePassManager(LLVMPassManagerBuilderRef PMB,
 572                                                 LLVMPassManagerRef PM) {
 573   PassManagerBuilder *Builder = unwrap(PMB);
 574   PassManagerBase *MPM = unwrap(PM);
 575   Builder->populateModulePassManager(*MPM);
 576 }
 577
 578 void LLVMPassManagerBuilderPopulateLTOPassManager(LLVMPassManagerBuilderRef PMB,
 579                                                   LLVMPassManagerRef PM,
 580                                                   LLVMBool Internalize,
 581                                                   LLVMBool RunInliner) {
 582   PassManagerBuilder *Builder = unwrap(PMB);
 583   PassManagerBase *LPM = unwrap(PM);
 584
 585   // A small backwards compatibility hack. populateLTOPassManager used to take
 586   // an RunInliner option.
 587   if (RunInliner && !Builder->Inliner)
 588     Builder->Inliner = createFunctionInliningPass();
 589
 590   Builder->populateLTOPassManager(*LPM);
 591 }