LLVM  6.0.0svn
PassManagerBuilder.cpp
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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 
17 #include "llvm/ADT/SmallVector.h"
23 #include "llvm/Analysis/Passes.h"
27 #include "llvm/IR/DataLayout.h"
30 #include "llvm/IR/Verifier.h"
34 #include "llvm/Transforms/IPO.h"
39 #include "llvm/Transforms/Scalar.h"
43 
44 using namespace llvm;
45 
46 static cl::opt<bool>
47  RunPartialInlining("enable-partial-inlining", cl::init(false), cl::Hidden,
48  cl::ZeroOrMore, cl::desc("Run Partial inlinining pass"));
49 
50 static cl::opt<bool>
51  RunLoopVectorization("vectorize-loops", cl::Hidden,
52  cl::desc("Run the Loop vectorization passes"));
53 
54 static cl::opt<bool>
55 RunSLPVectorization("vectorize-slp", cl::Hidden,
56  cl::desc("Run the SLP vectorization passes"));
57 
58 static cl::opt<bool>
59 UseGVNAfterVectorization("use-gvn-after-vectorization",
60  cl::init(false), cl::Hidden,
61  cl::desc("Run GVN instead of Early CSE after vectorization passes"));
62 
64  "extra-vectorizer-passes", cl::init(false), cl::Hidden,
65  cl::desc("Run cleanup optimization passes after vectorization."));
66 
67 static cl::opt<bool>
68 RunLoopRerolling("reroll-loops", cl::Hidden,
69  cl::desc("Run the loop rerolling pass"));
70 
71 static cl::opt<bool> RunNewGVN("enable-newgvn", cl::init(false), cl::Hidden,
72  cl::desc("Run the NewGVN pass"));
73 
74 static cl::opt<bool>
75 RunSLPAfterLoopVectorization("run-slp-after-loop-vectorization",
76  cl::init(true), cl::Hidden,
77  cl::desc("Run the SLP vectorizer (and BB vectorizer) after the Loop "
78  "vectorizer instead of before"));
79 
80 // Experimental option to use CFL-AA
82 static cl::opt<CFLAAType>
84  cl::desc("Enable the new, experimental CFL alias analysis"),
85  cl::values(clEnumValN(CFLAAType::None, "none", "Disable CFL-AA"),
87  "Enable unification-based CFL-AA"),
89  "Enable inclusion-based CFL-AA"),
91  "Enable both variants of CFL-AA")));
92 
94  "enable-loopinterchange", cl::init(false), cl::Hidden,
95  cl::desc("Enable the new, experimental LoopInterchange Pass"));
96 
97 static cl::opt<bool>
98  EnablePrepareForThinLTO("prepare-for-thinlto", cl::init(false), cl::Hidden,
99  cl::desc("Enable preparation for ThinLTO."));
100 
102  "profile-generate", cl::init(false), cl::Hidden,
103  cl::desc("Enable PGO instrumentation."));
104 
106  PGOOutputFile("profile-generate-file", cl::init(""), cl::Hidden,
107  cl::desc("Specify the path of profile data file."));
108 
110  "profile-use", cl::init(""), cl::Hidden, cl::value_desc("filename"),
111  cl::desc("Enable use phase of PGO instrumentation and specify the path "
112  "of profile data file"));
113 
115  "enable-loop-versioning-licm", cl::init(false), cl::Hidden,
116  cl::desc("Enable the experimental Loop Versioning LICM pass"));
117 
118 static cl::opt<bool>
119  DisablePreInliner("disable-preinline", cl::init(false), cl::Hidden,
120  cl::desc("Disable pre-instrumentation inliner"));
121 
123  "preinline-threshold", cl::Hidden, cl::init(75), cl::ZeroOrMore,
124  cl::desc("Control the amount of inlining in pre-instrumentation inliner "
125  "(default = 75)"));
126 
128  "enable-earlycse-memssa", cl::init(true), cl::Hidden,
129  cl::desc("Enable the EarlyCSE w/ MemorySSA pass (default = on)"));
130 
132  "enable-gvn-hoist", cl::init(false), cl::Hidden,
133  cl::desc("Enable the GVN hoisting pass (default = off)"));
134 
135 static cl::opt<bool>
136  DisableLibCallsShrinkWrap("disable-libcalls-shrinkwrap", cl::init(false),
137  cl::Hidden,
138  cl::desc("Disable shrink-wrap library calls"));
139 
140 static cl::opt<bool>
141  EnableSimpleLoopUnswitch("enable-simple-loop-unswitch", cl::init(false),
142  cl::Hidden,
143  cl::desc("Enable the simple loop unswitch pass."));
144 
146  "enable-gvn-sink", cl::init(false), cl::Hidden,
147  cl::desc("Enable the GVN sinking pass (default = off)"));
148 
150  OptLevel = 2;
151  SizeLevel = 0;
152  LibraryInfo = nullptr;
153  Inliner = nullptr;
154  DisableUnrollLoops = false;
155  SLPVectorize = RunSLPVectorization;
156  LoopVectorize = RunLoopVectorization;
157  RerollLoops = RunLoopRerolling;
158  NewGVN = RunNewGVN;
159  DisableGVNLoadPRE = false;
160  VerifyInput = false;
161  VerifyOutput = false;
162  MergeFunctions = false;
163  PrepareForLTO = false;
164  EnablePGOInstrGen = RunPGOInstrGen;
165  PGOInstrGen = PGOOutputFile;
166  PGOInstrUse = RunPGOInstrUse;
167  PrepareForThinLTO = EnablePrepareForThinLTO;
168  PerformThinLTO = false;
169  DivergentTarget = false;
170 }
171 
173  delete LibraryInfo;
174  delete Inliner;
175 }
176 
177 /// Set of global extensions, automatically added as part of the standard set.
180 
181 /// Check if GlobalExtensions is constructed and not empty.
182 /// Since GlobalExtensions is a managed static, calling 'empty()' will trigger
183 /// the construction of the object.
185  return GlobalExtensions.isConstructed() && !GlobalExtensions->empty();
186 }
187 
189  PassManagerBuilder::ExtensionPointTy Ty,
191  GlobalExtensions->push_back(std::make_pair(Ty, std::move(Fn)));
192 }
193 
195  Extensions.push_back(std::make_pair(Ty, std::move(Fn)));
196 }
197 
198 void PassManagerBuilder::addExtensionsToPM(ExtensionPointTy ETy,
199  legacy::PassManagerBase &PM) const {
200  if (GlobalExtensionsNotEmpty()) {
201  for (auto &Ext : *GlobalExtensions) {
202  if (Ext.first == ETy)
203  Ext.second(*this, PM);
204  }
205  }
206  for (unsigned i = 0, e = Extensions.size(); i != e; ++i)
207  if (Extensions[i].first == ETy)
208  Extensions[i].second(*this, PM);
209 }
210 
211 void PassManagerBuilder::addInitialAliasAnalysisPasses(
212  legacy::PassManagerBase &PM) const {
213  switch (UseCFLAA) {
216  break;
217  case CFLAAType::Andersen:
219  break;
220  case CFLAAType::Both:
223  break;
224  default:
225  break;
226  }
227 
228  // Add TypeBasedAliasAnalysis before BasicAliasAnalysis so that
229  // BasicAliasAnalysis wins if they disagree. This is intended to help
230  // support "obvious" type-punning idioms.
233 }
234 
235 void PassManagerBuilder::addInstructionCombiningPass(
236  legacy::PassManagerBase &PM) const {
237  bool ExpensiveCombines = OptLevel > 2;
238  PM.add(createInstructionCombiningPass(ExpensiveCombines));
239 }
240 
243  addExtensionsToPM(EP_EarlyAsPossible, FPM);
245 
246  // Add LibraryInfo if we have some.
247  if (LibraryInfo)
248  FPM.add(new TargetLibraryInfoWrapperPass(*LibraryInfo));
249 
250  if (OptLevel == 0) return;
251 
252  addInitialAliasAnalysisPasses(FPM);
253 
255  FPM.add(createSROAPass());
256  FPM.add(createEarlyCSEPass());
258 }
259 
260 // Do PGO instrumentation generation or use pass as the option specified.
261 void PassManagerBuilder::addPGOInstrPasses(legacy::PassManagerBase &MPM) {
262  if (!EnablePGOInstrGen && PGOInstrUse.empty() && PGOSampleUse.empty())
263  return;
264  // Perform the preinline and cleanup passes for O1 and above.
265  // And avoid doing them if optimizing for size.
266  if (OptLevel > 0 && SizeLevel == 0 && !DisablePreInliner &&
267  PGOSampleUse.empty()) {
268  // Create preinline pass. We construct an InlineParams object and specify
269  // the threshold here to avoid the command line options of the regular
270  // inliner to influence pre-inlining. The only fields of InlineParams we
271  // care about are DefaultThreshold and HintThreshold.
272  InlineParams IP;
274  // FIXME: The hint threshold has the same value used by the regular inliner.
275  // This should probably be lowered after performance testing.
276  IP.HintThreshold = 325;
277 
279  MPM.add(createSROAPass());
280  MPM.add(createEarlyCSEPass()); // Catch trivial redundancies
281  MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
282  MPM.add(createInstructionCombiningPass()); // Combine silly seq's
283  addExtensionsToPM(EP_Peephole, MPM);
284  }
285  if (EnablePGOInstrGen) {
287  // Add the profile lowering pass.
288  InstrProfOptions Options;
289  if (!PGOInstrGen.empty())
290  Options.InstrProfileOutput = PGOInstrGen;
291  Options.DoCounterPromotion = true;
292  MPM.add(createLoopRotatePass());
293  MPM.add(createInstrProfilingLegacyPass(Options));
294  }
295  if (!PGOInstrUse.empty())
296  MPM.add(createPGOInstrumentationUseLegacyPass(PGOInstrUse));
297  // Indirect call promotion that promotes intra-module targets only.
298  // For ThinLTO this is done earlier due to interactions with globalopt
299  // for imported functions. We don't run this at -O0.
300  if (OptLevel > 0)
301  MPM.add(
302  createPGOIndirectCallPromotionLegacyPass(false, !PGOSampleUse.empty()));
303 }
304 void PassManagerBuilder::addFunctionSimplificationPasses(
306  // Start of function pass.
307  // Break up aggregate allocas, using SSAUpdater.
308  MPM.add(createSROAPass());
309  MPM.add(createEarlyCSEPass(EnableEarlyCSEMemSSA)); // Catch trivial redundancies
310  if (EnableGVNHoist)
311  MPM.add(createGVNHoistPass());
312  if (EnableGVNSink) {
313  MPM.add(createGVNSinkPass());
315  }
316 
317  // Speculative execution if the target has divergent branches; otherwise nop.
319  MPM.add(createJumpThreadingPass()); // Thread jumps.
320  MPM.add(createCorrelatedValuePropagationPass()); // Propagate conditionals
321  MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
322  // Combine silly seq's
323  addInstructionCombiningPass(MPM);
324  if (SizeLevel == 0 && !DisableLibCallsShrinkWrap)
326  addExtensionsToPM(EP_Peephole, MPM);
327 
328  // Optimize memory intrinsic calls based on the profiled size information.
329  if (SizeLevel == 0)
331 
332  MPM.add(createTailCallEliminationPass()); // Eliminate tail calls
333  MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
334  MPM.add(createReassociatePass()); // Reassociate expressions
335  // Rotate Loop - disable header duplication at -Oz
336  MPM.add(createLoopRotatePass(SizeLevel == 2 ? 0 : -1));
337  MPM.add(createLICMPass()); // Hoist loop invariants
338  if (EnableSimpleLoopUnswitch)
340  else
341  MPM.add(createLoopUnswitchPass(SizeLevel || OptLevel < 3, DivergentTarget));
343  addInstructionCombiningPass(MPM);
344  MPM.add(createIndVarSimplifyPass()); // Canonicalize indvars
345  MPM.add(createLoopIdiomPass()); // Recognize idioms like memset.
346  addExtensionsToPM(EP_LateLoopOptimizations, MPM);
347  MPM.add(createLoopDeletionPass()); // Delete dead loops
348 
349  if (EnableLoopInterchange) {
350  MPM.add(createLoopInterchangePass()); // Interchange loops
352  }
353  if (!DisableUnrollLoops)
354  MPM.add(createSimpleLoopUnrollPass(OptLevel)); // Unroll small loops
355  addExtensionsToPM(EP_LoopOptimizerEnd, MPM);
356 
357  if (OptLevel > 1) {
358  MPM.add(createMergedLoadStoreMotionPass()); // Merge ld/st in diamonds
359  MPM.add(NewGVN ? createNewGVNPass()
360  : createGVNPass(DisableGVNLoadPRE)); // Remove redundancies
361  }
362  MPM.add(createMemCpyOptPass()); // Remove memcpy / form memset
363  MPM.add(createSCCPPass()); // Constant prop with SCCP
364 
365  // Delete dead bit computations (instcombine runs after to fold away the dead
366  // computations, and then ADCE will run later to exploit any new DCE
367  // opportunities that creates).
368  MPM.add(createBitTrackingDCEPass()); // Delete dead bit computations
369 
370  // Run instcombine after redundancy elimination to exploit opportunities
371  // opened up by them.
372  addInstructionCombiningPass(MPM);
373  addExtensionsToPM(EP_Peephole, MPM);
374  MPM.add(createJumpThreadingPass()); // Thread jumps
376  MPM.add(createDeadStoreEliminationPass()); // Delete dead stores
377  MPM.add(createLICMPass());
378 
379  addExtensionsToPM(EP_ScalarOptimizerLate, MPM);
380 
381  if (RerollLoops)
382  MPM.add(createLoopRerollPass());
383  if (!RunSLPAfterLoopVectorization && SLPVectorize)
384  MPM.add(createSLPVectorizerPass()); // Vectorize parallel scalar chains.
385 
386  MPM.add(createAggressiveDCEPass()); // Delete dead instructions
387  MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
388  // Clean up after everything.
389  addInstructionCombiningPass(MPM);
390  addExtensionsToPM(EP_Peephole, MPM);
391 }
392 
395  if (!PGOSampleUse.empty()) {
396  MPM.add(createPruneEHPass());
397  MPM.add(createSampleProfileLoaderPass(PGOSampleUse));
398  }
399 
400  // Allow forcing function attributes as a debugging and tuning aid.
402 
403  // If all optimizations are disabled, just run the always-inline pass and,
404  // if enabled, the function merging pass.
405  if (OptLevel == 0) {
406  addPGOInstrPasses(MPM);
407  if (Inliner) {
408  MPM.add(Inliner);
409  Inliner = nullptr;
410  }
411 
412  // FIXME: The BarrierNoopPass is a HACK! The inliner pass above implicitly
413  // creates a CGSCC pass manager, but we don't want to add extensions into
414  // that pass manager. To prevent this we insert a no-op module pass to reset
415  // the pass manager to get the same behavior as EP_OptimizerLast in non-O0
416  // builds. The function merging pass is
417  if (MergeFunctions)
419  else if (GlobalExtensionsNotEmpty() || !Extensions.empty())
420  MPM.add(createBarrierNoopPass());
421 
422  if (PerformThinLTO) {
423  // Drop available_externally and unreferenced globals. This is necessary
424  // with ThinLTO in order to avoid leaving undefined references to dead
425  // globals in the object file.
427  MPM.add(createGlobalDCEPass());
428  }
429 
430  addExtensionsToPM(EP_EnabledOnOptLevel0, MPM);
431 
432  // Rename anon globals to be able to export them in the summary.
433  // This has to be done after we add the extensions to the pass manager
434  // as there could be passes (e.g. Adddress sanitizer) which introduce
435  // new unnamed globals.
436  if (PrepareForThinLTO)
438  return;
439  }
440 
441  // Add LibraryInfo if we have some.
442  if (LibraryInfo)
443  MPM.add(new TargetLibraryInfoWrapperPass(*LibraryInfo));
444 
445  addInitialAliasAnalysisPasses(MPM);
446 
447  // For ThinLTO there are two passes of indirect call promotion. The
448  // first is during the compile phase when PerformThinLTO=false and
449  // intra-module indirect call targets are promoted. The second is during
450  // the ThinLTO backend when PerformThinLTO=true, when we promote imported
451  // inter-module indirect calls. For that we perform indirect call promotion
452  // earlier in the pass pipeline, here before globalopt. Otherwise imported
453  // available_externally functions look unreferenced and are removed.
454  if (PerformThinLTO)
455  MPM.add(createPGOIndirectCallPromotionLegacyPass(/*InLTO = */ true,
456  !PGOSampleUse.empty()));
457 
458  // For SamplePGO in ThinLTO compile phase, we do not want to unroll loops
459  // as it will change the CFG too much to make the 2nd profile annotation
460  // in backend more difficult.
461  bool PrepareForThinLTOUsingPGOSampleProfile =
462  PrepareForThinLTO && !PGOSampleUse.empty();
463  if (PrepareForThinLTOUsingPGOSampleProfile)
464  DisableUnrollLoops = true;
465 
466  // Infer attributes about declarations if possible.
468 
469  addExtensionsToPM(EP_ModuleOptimizerEarly, MPM);
470 
471  if (OptLevel > 2)
473 
474  MPM.add(createIPSCCPPass()); // IP SCCP
476  MPM.add(createGlobalOptimizerPass()); // Optimize out global vars
477  // Promote any localized global vars.
479 
480  MPM.add(createDeadArgEliminationPass()); // Dead argument elimination
481 
482  addInstructionCombiningPass(MPM); // Clean up after IPCP & DAE
483  addExtensionsToPM(EP_Peephole, MPM);
484  MPM.add(createCFGSimplificationPass()); // Clean up after IPCP & DAE
485 
486  // For SamplePGO in ThinLTO compile phase, we do not want to do indirect
487  // call promotion as it will change the CFG too much to make the 2nd
488  // profile annotation in backend more difficult.
489  // PGO instrumentation is added during the compile phase for ThinLTO, do
490  // not run it a second time
491  if (!PerformThinLTO && !PrepareForThinLTOUsingPGOSampleProfile)
492  addPGOInstrPasses(MPM);
493 
494  // We add a module alias analysis pass here. In part due to bugs in the
495  // analysis infrastructure this "works" in that the analysis stays alive
496  // for the entire SCC pass run below.
498 
499  // Start of CallGraph SCC passes.
500  MPM.add(createPruneEHPass()); // Remove dead EH info
501  bool RunInliner = false;
502  if (Inliner) {
503  MPM.add(Inliner);
504  Inliner = nullptr;
505  RunInliner = true;
506  }
507 
509  if (OptLevel > 2)
510  MPM.add(createArgumentPromotionPass()); // Scalarize uninlined fn args
511 
512  addExtensionsToPM(EP_CGSCCOptimizerLate, MPM);
513  addFunctionSimplificationPasses(MPM);
514 
515  // FIXME: This is a HACK! The inliner pass above implicitly creates a CGSCC
516  // pass manager that we are specifically trying to avoid. To prevent this
517  // we must insert a no-op module pass to reset the pass manager.
518  MPM.add(createBarrierNoopPass());
519 
520  if (RunPartialInlining)
522 
523  if (OptLevel > 1 && !PrepareForLTO && !PrepareForThinLTO)
524  // Remove avail extern fns and globals definitions if we aren't
525  // compiling an object file for later LTO. For LTO we want to preserve
526  // these so they are eligible for inlining at link-time. Note if they
527  // are unreferenced they will be removed by GlobalDCE later, so
528  // this only impacts referenced available externally globals.
529  // Eventually they will be suppressed during codegen, but eliminating
530  // here enables more opportunity for GlobalDCE as it may make
531  // globals referenced by available external functions dead
532  // and saves running remaining passes on the eliminated functions.
534 
536 
537  // The inliner performs some kind of dead code elimination as it goes,
538  // but there are cases that are not really caught by it. We might
539  // at some point consider teaching the inliner about them, but it
540  // is OK for now to run GlobalOpt + GlobalDCE in tandem as their
541  // benefits generally outweight the cost, making the whole pipeline
542  // faster.
543  if (RunInliner) {
545  MPM.add(createGlobalDCEPass());
546  }
547 
548  // If we are planning to perform ThinLTO later, let's not bloat the code with
549  // unrolling/vectorization/... now. We'll first run the inliner + CGSCC passes
550  // during ThinLTO and perform the rest of the optimizations afterward.
551  if (PrepareForThinLTO) {
552  // Ensure we perform any last passes, but do so before renaming anonymous
553  // globals in case the passes add any.
554  addExtensionsToPM(EP_OptimizerLast, MPM);
555  // Rename anon globals to be able to export them in the summary.
557  return;
558  }
559 
560  if (PerformThinLTO)
561  // Optimize globals now when performing ThinLTO, this enables more
562  // optimizations later.
564 
565  // Scheduling LoopVersioningLICM when inlining is over, because after that
566  // we may see more accurate aliasing. Reason to run this late is that too
567  // early versioning may prevent further inlining due to increase of code
568  // size. By placing it just after inlining other optimizations which runs
569  // later might get benefit of no-alias assumption in clone loop.
570  if (UseLoopVersioningLICM) {
571  MPM.add(createLoopVersioningLICMPass()); // Do LoopVersioningLICM
572  MPM.add(createLICMPass()); // Hoist loop invariants
573  }
574 
575  // We add a fresh GlobalsModRef run at this point. This is particularly
576  // useful as the above will have inlined, DCE'ed, and function-attr
577  // propagated everything. We should at this point have a reasonably minimal
578  // and richly annotated call graph. By computing aliasing and mod/ref
579  // information for all local globals here, the late loop passes and notably
580  // the vectorizer will be able to use them to help recognize vectorizable
581  // memory operations.
582  //
583  // Note that this relies on a bug in the pass manager which preserves
584  // a module analysis into a function pass pipeline (and throughout it) so
585  // long as the first function pass doesn't invalidate the module analysis.
586  // Thus both Float2Int and LoopRotate have to preserve AliasAnalysis for
587  // this to work. Fortunately, it is trivial to preserve AliasAnalysis
588  // (doing nothing preserves it as it is required to be conservatively
589  // correct in the face of IR changes).
591 
592  MPM.add(createFloat2IntPass());
593 
594  addExtensionsToPM(EP_VectorizerStart, MPM);
595 
596  // Re-rotate loops in all our loop nests. These may have fallout out of
597  // rotated form due to GVN or other transformations, and the vectorizer relies
598  // on the rotated form. Disable header duplication at -Oz.
599  MPM.add(createLoopRotatePass(SizeLevel == 2 ? 0 : -1));
600 
601  // Distribute loops to allow partial vectorization. I.e. isolate dependences
602  // into separate loop that would otherwise inhibit vectorization. This is
603  // currently only performed for loops marked with the metadata
604  // llvm.loop.distribute=true or when -enable-loop-distribute is specified.
606 
607  MPM.add(createLoopVectorizePass(DisableUnrollLoops, LoopVectorize));
608 
609  // Eliminate loads by forwarding stores from the previous iteration to loads
610  // of the current iteration.
612 
613  // FIXME: Because of #pragma vectorize enable, the passes below are always
614  // inserted in the pipeline, even when the vectorizer doesn't run (ex. when
615  // on -O1 and no #pragma is found). Would be good to have these two passes
616  // as function calls, so that we can only pass them when the vectorizer
617  // changed the code.
618  addInstructionCombiningPass(MPM);
619  if (OptLevel > 1 && ExtraVectorizerPasses) {
620  // At higher optimization levels, try to clean up any runtime overlap and
621  // alignment checks inserted by the vectorizer. We want to track correllated
622  // runtime checks for two inner loops in the same outer loop, fold any
623  // common computations, hoist loop-invariant aspects out of any outer loop,
624  // and unswitch the runtime checks if possible. Once hoisted, we may have
625  // dead (or speculatable) control flows or more combining opportunities.
626  MPM.add(createEarlyCSEPass());
628  addInstructionCombiningPass(MPM);
629  MPM.add(createLICMPass());
630  MPM.add(createLoopUnswitchPass(SizeLevel || OptLevel < 3, DivergentTarget));
632  addInstructionCombiningPass(MPM);
633  }
634 
635  if (RunSLPAfterLoopVectorization && SLPVectorize) {
636  MPM.add(createSLPVectorizerPass()); // Vectorize parallel scalar chains.
637  if (OptLevel > 1 && ExtraVectorizerPasses) {
638  MPM.add(createEarlyCSEPass());
639  }
640  }
641 
642  addExtensionsToPM(EP_Peephole, MPM);
643  // Switches to lookup tables and other transforms that may not be considered
644  // canonical by other IR passes.
645  MPM.add(createCFGSimplificationPass(1, true, true, false));
646  addInstructionCombiningPass(MPM);
647 
648  if (!DisableUnrollLoops) {
649  MPM.add(createLoopUnrollPass(OptLevel)); // Unroll small loops
650 
651  // LoopUnroll may generate some redundency to cleanup.
652  addInstructionCombiningPass(MPM);
653 
654  // Runtime unrolling will introduce runtime check in loop prologue. If the
655  // unrolled loop is a inner loop, then the prologue will be inside the
656  // outer loop. LICM pass can help to promote the runtime check out if the
657  // checked value is loop invariant.
658  MPM.add(createLICMPass());
659  }
660 
661  // After vectorization and unrolling, assume intrinsics may tell us more
662  // about pointer alignments.
664 
665  // FIXME: We shouldn't bother with this anymore.
666  MPM.add(createStripDeadPrototypesPass()); // Get rid of dead prototypes
667 
668  // GlobalOpt already deletes dead functions and globals, at -O2 try a
669  // late pass of GlobalDCE. It is capable of deleting dead cycles.
670  if (OptLevel > 1) {
671  MPM.add(createGlobalDCEPass()); // Remove dead fns and globals.
672  MPM.add(createConstantMergePass()); // Merge dup global constants
673  }
674 
675  if (MergeFunctions)
677 
678  // LoopSink pass sinks instructions hoisted by LICM, which serves as a
679  // canonicalization pass that enables other optimizations. As a result,
680  // LoopSink pass needs to be a very late IR pass to avoid undoing LICM
681  // result too early.
682  MPM.add(createLoopSinkPass());
683  // Get rid of LCSSA nodes.
685 
686  // This hoists/decomposes div/rem ops. It should run after other sink/hoist
687  // passes to avoid re-sinking, but before SimplifyCFG because it can allow
688  // flattening of blocks.
689  MPM.add(createDivRemPairsPass());
690 
691  // LoopSink (and other loop passes since the last simplifyCFG) might have
692  // resulted in single-entry-single-exit or empty blocks. Clean up the CFG.
694 
695  addExtensionsToPM(EP_OptimizerLast, MPM);
696 }
697 
698 void PassManagerBuilder::addLTOOptimizationPasses(legacy::PassManagerBase &PM) {
699  // Remove unused virtual tables to improve the quality of code generated by
700  // whole-program devirtualization and bitset lowering.
701  PM.add(createGlobalDCEPass());
702 
703  // Provide AliasAnalysis services for optimizations.
704  addInitialAliasAnalysisPasses(PM);
705 
706  // Allow forcing function attributes as a debugging and tuning aid.
708 
709  // Infer attributes about declarations if possible.
711 
712  if (OptLevel > 1) {
713  // Split call-site with more constrained arguments.
715 
716  // Indirect call promotion. This should promote all the targets that are
717  // left by the earlier promotion pass that promotes intra-module targets.
718  // This two-step promotion is to save the compile time. For LTO, it should
719  // produce the same result as if we only do promotion here.
720  PM.add(
721  createPGOIndirectCallPromotionLegacyPass(true, !PGOSampleUse.empty()));
722 
723  // Propagate constants at call sites into the functions they call. This
724  // opens opportunities for globalopt (and inlining) by substituting function
725  // pointers passed as arguments to direct uses of functions.
726  PM.add(createIPSCCPPass());
727 
728  // Attach metadata to indirect call sites indicating the set of functions
729  // they may target at run-time. This should follow IPSCCP.
731  }
732 
733  // Infer attributes about definitions. The readnone attribute in particular is
734  // required for virtual constant propagation.
737 
738  // Split globals using inrange annotations on GEP indices. This can help
739  // improve the quality of generated code when virtual constant propagation or
740  // control flow integrity are enabled.
742 
743  // Apply whole-program devirtualization and virtual constant propagation.
744  PM.add(createWholeProgramDevirtPass(ExportSummary, nullptr));
745 
746  // That's all we need at opt level 1.
747  if (OptLevel == 1)
748  return;
749 
750  // Now that we internalized some globals, see if we can hack on them!
752  // Promote any localized global vars.
754 
755  // Linking modules together can lead to duplicated global constants, only
756  // keep one copy of each constant.
758 
759  // Remove unused arguments from functions.
761 
762  // Reduce the code after globalopt and ipsccp. Both can open up significant
763  // simplification opportunities, and both can propagate functions through
764  // function pointers. When this happens, we often have to resolve varargs
765  // calls, etc, so let instcombine do this.
766  addInstructionCombiningPass(PM);
767  addExtensionsToPM(EP_Peephole, PM);
768 
769  // Inline small functions
770  bool RunInliner = Inliner;
771  if (RunInliner) {
772  PM.add(Inliner);
773  Inliner = nullptr;
774  }
775 
776  PM.add(createPruneEHPass()); // Remove dead EH info.
777 
778  // Optimize globals again if we ran the inliner.
779  if (RunInliner)
781  PM.add(createGlobalDCEPass()); // Remove dead functions.
782 
783  // If we didn't decide to inline a function, check to see if we can
784  // transform it to pass arguments by value instead of by reference.
786 
787  // The IPO passes may leave cruft around. Clean up after them.
788  addInstructionCombiningPass(PM);
789  addExtensionsToPM(EP_Peephole, PM);
791 
792  // Break up allocas
793  PM.add(createSROAPass());
794 
795  // Run a few AA driven optimizations here and now, to cleanup the code.
796  PM.add(createPostOrderFunctionAttrsLegacyPass()); // Add nocapture.
797  PM.add(createGlobalsAAWrapperPass()); // IP alias analysis.
798 
799  PM.add(createLICMPass()); // Hoist loop invariants.
800  PM.add(createMergedLoadStoreMotionPass()); // Merge ld/st in diamonds.
801  PM.add(NewGVN ? createNewGVNPass()
802  : createGVNPass(DisableGVNLoadPRE)); // Remove redundancies.
803  PM.add(createMemCpyOptPass()); // Remove dead memcpys.
804 
805  // Nuke dead stores.
807 
808  // More loops are countable; try to optimize them.
811  if (EnableLoopInterchange)
813 
814  if (!DisableUnrollLoops)
815  PM.add(createSimpleLoopUnrollPass(OptLevel)); // Unroll small loops
816  PM.add(createLoopVectorizePass(true, LoopVectorize));
817  // The vectorizer may have significantly shortened a loop body; unroll again.
818  if (!DisableUnrollLoops)
819  PM.add(createLoopUnrollPass(OptLevel));
820 
821  // Now that we've optimized loops (in particular loop induction variables),
822  // we may have exposed more scalar opportunities. Run parts of the scalar
823  // optimizer again at this point.
824  addInstructionCombiningPass(PM); // Initial cleanup
825  PM.add(createCFGSimplificationPass()); // if-convert
826  PM.add(createSCCPPass()); // Propagate exposed constants
827  addInstructionCombiningPass(PM); // Clean up again
829 
830  // More scalar chains could be vectorized due to more alias information
832  if (SLPVectorize)
833  PM.add(createSLPVectorizerPass()); // Vectorize parallel scalar chains.
834 
835  // After vectorization, assume intrinsics may tell us more about pointer
836  // alignments.
838 
839  // Cleanup and simplify the code after the scalar optimizations.
840  addInstructionCombiningPass(PM);
841  addExtensionsToPM(EP_Peephole, PM);
842 
844 }
845 
846 void PassManagerBuilder::addLateLTOOptimizationPasses(
848  // Delete basic blocks, which optimization passes may have killed.
850 
851  // Drop bodies of available externally objects to improve GlobalDCE.
853 
854  // Now that we have optimized the program, discard unreachable functions.
855  PM.add(createGlobalDCEPass());
856 
857  // FIXME: this is profitable (for compiler time) to do at -O0 too, but
858  // currently it damages debug info.
859  if (MergeFunctions)
861 }
862 
865  PerformThinLTO = true;
866 
867  if (VerifyInput)
868  PM.add(createVerifierPass());
869 
870  if (ImportSummary) {
871  // These passes import type identifier resolutions for whole-program
872  // devirtualization and CFI. They must run early because other passes may
873  // disturb the specific instruction patterns that these passes look for,
874  // creating dependencies on resolutions that may not appear in the summary.
875  //
876  // For example, GVN may transform the pattern assume(type.test) appearing in
877  // two basic blocks into assume(phi(type.test, type.test)), which would
878  // transform a dependency on a WPD resolution into a dependency on a type
879  // identifier resolution for CFI.
880  //
881  // Also, WPD has access to more precise information than ICP and can
882  // devirtualize more effectively, so it should operate on the IR first.
883  PM.add(createWholeProgramDevirtPass(nullptr, ImportSummary));
884  PM.add(createLowerTypeTestsPass(nullptr, ImportSummary));
885  }
886 
887  populateModulePassManager(PM);
888 
889  if (VerifyOutput)
890  PM.add(createVerifierPass());
891  PerformThinLTO = false;
892 }
893 
895  if (LibraryInfo)
896  PM.add(new TargetLibraryInfoWrapperPass(*LibraryInfo));
897 
898  if (VerifyInput)
899  PM.add(createVerifierPass());
900 
901  if (OptLevel != 0)
902  addLTOOptimizationPasses(PM);
903  else {
904  // The whole-program-devirt pass needs to run at -O0 because only it knows
905  // about the llvm.type.checked.load intrinsic: it needs to both lower the
906  // intrinsic itself and handle it in the summary.
907  PM.add(createWholeProgramDevirtPass(ExportSummary, nullptr));
908  }
909 
910  // Create a function that performs CFI checks for cross-DSO calls with targets
911  // in the current module.
913 
914  // Lower type metadata and the type.test intrinsic. This pass supports Clang's
915  // control flow integrity mechanisms (-fsanitize=cfi*) and needs to run at
916  // link time if CFI is enabled. The pass does nothing if CFI is disabled.
917  PM.add(createLowerTypeTestsPass(ExportSummary, nullptr));
918 
919  if (OptLevel != 0)
920  addLateLTOOptimizationPasses(PM);
921 
922  if (VerifyOutput)
923  PM.add(createVerifierPass());
924 }
925 
927  return reinterpret_cast<PassManagerBuilder*>(P);
928 }
929 
931  return reinterpret_cast<LLVMPassManagerBuilderRef>(P);
932 }
933 
936  return wrap(PMB);
937 }
938 
940  PassManagerBuilder *Builder = unwrap(PMB);
941  delete Builder;
942 }
943 
944 void
946  unsigned OptLevel) {
947  PassManagerBuilder *Builder = unwrap(PMB);
948  Builder->OptLevel = OptLevel;
949 }
950 
951 void
953  unsigned SizeLevel) {
954  PassManagerBuilder *Builder = unwrap(PMB);
955  Builder->SizeLevel = SizeLevel;
956 }
957 
958 void
960  LLVMBool Value) {
961  // NOTE: The DisableUnitAtATime switch has been removed.
962 }
963 
964 void
966  LLVMBool Value) {
967  PassManagerBuilder *Builder = unwrap(PMB);
968  Builder->DisableUnrollLoops = Value;
969 }
970 
971 void
973  LLVMBool Value) {
974  // NOTE: The simplify-libcalls pass has been removed.
975 }
976 
977 void
979  unsigned Threshold) {
980  PassManagerBuilder *Builder = unwrap(PMB);
981  Builder->Inliner = createFunctionInliningPass(Threshold);
982 }
983 
984 void
986  LLVMPassManagerRef PM) {
987  PassManagerBuilder *Builder = unwrap(PMB);
988  legacy::FunctionPassManager *FPM = unwrap<legacy::FunctionPassManager>(PM);
989  Builder->populateFunctionPassManager(*FPM);
990 }
991 
992 void
994  LLVMPassManagerRef PM) {
995  PassManagerBuilder *Builder = unwrap(PMB);
996  legacy::PassManagerBase *MPM = unwrap(PM);
997  Builder->populateModulePassManager(*MPM);
998 }
999 
1001  LLVMPassManagerRef PM,
1002  LLVMBool Internalize,
1003  LLVMBool RunInliner) {
1004  PassManagerBuilder *Builder = unwrap(PMB);
1005  legacy::PassManagerBase *LPM = unwrap(PM);
1006 
1007  // A small backwards compatibility hack. populateLTOPassManager used to take
1008  // an RunInliner option.
1009  if (RunInliner && !Builder->Inliner)
1010  Builder->Inliner = createFunctionInliningPass();
1011 
1012  Builder->populateLTOPassManager(*LPM);
1013 }
Super simple passes to force specific function attrs from the commandline into the IR for debugging p...
ModulePass * createNameAnonGlobalPass()
===------------------------------------------------------------------—===//
FunctionPass * createGVNPass(bool NoLoads=false)
Create a legacy GVN pass.
Definition: GVN.cpp:2648
Pass * createLoopRerollPass()
Thresholds to tune inline cost analysis.
Definition: InlineCost.h:130
void LLVMPassManagerBuilderSetOptLevel(LLVMPassManagerBuilderRef PMB, unsigned OptLevel)
See llvm::PassManagerBuilder::OptLevel.
ModulePass * createStripDeadPrototypesPass()
createStripDeadPrototypesPass - This pass removes any function declarations (prototypes) that are not...
ModulePass * createPGOInstrumentationGenLegacyPass()
static cl::opt< bool > UseLoopVersioningLICM("enable-loop-versioning-licm", cl::init(false), cl::Hidden, cl::desc("Enable the experimental Loop Versioning LICM pass"))
PassManagerBuilder - This class is used to set up a standard optimization sequence for languages like...
partial Partial Inliner
This is the interface for LLVM&#39;s inclusion-based alias analysis implemented with CFL graph reachabili...
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
This is the interface for a simple mod/ref and alias analysis over globals.
static cl::opt< bool > EnableEarlyCSEMemSSA("enable-earlycse-memssa", cl::init(true), cl::Hidden, cl::desc("Enable the EarlyCSE w/ MemorySSA pass (default = on)"))
FunctionPass * createPGOMemOPSizeOptLegacyPass()
FunctionPass * createCFGSimplificationPass(unsigned Threshold=1, bool ForwardSwitchCond=false, bool ConvertSwitch=false, bool KeepLoops=true, std::function< bool(const Function &)> Ftor=nullptr)
ModulePass * createMergeFunctionsPass()
createMergeFunctionsPass - This pass discovers identical functions and collapses them.
Pass * createLoopUnrollPass(int OptLevel=2, int Threshold=-1, int Count=-1, int AllowPartial=-1, int Runtime=-1, int UpperBound=-1, int AllowPeeling=-1)
void populateThinLTOPassManager(legacy::PassManagerBase &PM)
static cl::opt< bool > EnableGVNHoist("enable-gvn-hoist", cl::init(false), cl::Hidden, cl::desc("Enable the GVN hoisting pass (default = off)"))
void LLVMPassManagerBuilderSetDisableSimplifyLibCalls(LLVMPassManagerBuilderRef PMB, LLVMBool Value)
See llvm::PassManagerBuilder::DisableSimplifyLibCalls.
This is the interface for a metadata-based scoped no-alias analysis.
static cl::opt< std::string > RunPGOInstrUse("profile-use", cl::init(""), cl::Hidden, cl::value_desc("filename"), cl::desc("Enable use phase of PGO instrumentation and specify the path " "of profile data file"))
FunctionPass * createVerifierPass(bool FatalErrors=true)
Definition: Verifier.cpp:4977
ModulePass * createIPSCCPPass()
createIPSCCPPass - This pass propagates constants from call sites into the bodies of functions...
Definition: SCCP.cpp:2038
FunctionPass * createFloat2IntPass()
Definition: Float2Int.cpp:514
virtual void add(Pass *P)=0
Add a pass to the queue of passes to run.
void LLVMPassManagerBuilderSetDisableUnrollLoops(LLVMPassManagerBuilderRef PMB, LLVMBool Value)
See llvm::PassManagerBuilder::DisableUnrollLoops.
static cl::opt< std::string > PGOOutputFile("profile-generate-file", cl::init(""), cl::Hidden, cl::desc("Specify the path of profile data file."))
ModulePass * createEliminateAvailableExternallyPass()
This transform is designed to eliminate available external globals (functions or global variables) ...
FunctionPass * createGVNHoistPass()
Definition: GVNHoist.cpp:1207
static cl::opt< bool > RunPGOInstrGen("profile-generate", cl::init(false), cl::Hidden, cl::desc("Enable PGO instrumentation."))
ModulePass * createInstrProfilingLegacyPass(const InstrProfOptions &Options=InstrProfOptions())
Insert frontend instrumentation based profiling.
ImmutablePass * createScopedNoAliasAAWrapperPass()
FunctionPass * createAlignmentFromAssumptionsPass()
void LLVMPassManagerBuilderPopulateLTOPassManager(LLVMPassManagerBuilderRef PMB, LLVMPassManagerRef PM, LLVMBool Internalize, LLVMBool RunInliner)
See llvm::PassManagerBuilder::populateLTOPassManager.
Pass * Inliner
Inliner - Specifies the inliner to use.
FunctionPass * createJumpThreadingPass(int Threshold=-1)
static cl::opt< bool > RunLoopVectorization("vectorize-loops", cl::Hidden, cl::desc("Run the Loop vectorization passes"))
ModulePass * createPartialInliningPass()
createPartialInliningPass - This pass inlines parts of functions.
Attribute unwrap(LLVMAttributeRef Attr)
Definition: Attributes.h:195
static void addGlobalExtension(ExtensionPointTy Ty, ExtensionFn Fn)
Adds an extension that will be used by all PassManagerBuilder instances.
Optional< int > HintThreshold
Threshold to use for callees with inline hint.
Definition: InlineCost.h:135
void populateLTOPassManager(legacy::PassManagerBase &PM)
ModulePass * createCrossDSOCFIPass()
This pass export CFI checks for use by external modules.
static cl::opt< bool > ExtraVectorizerPasses("extra-vectorizer-passes", cl::init(false), cl::Hidden, cl::desc("Run cleanup optimization passes after vectorization."))
FunctionPass * createReassociatePass()
Pass * createSimpleLoopUnrollPass(int OptLevel=2)
Pass * createArgumentPromotionPass(unsigned maxElements=3)
createArgumentPromotionPass - This pass promotes "by reference" arguments to be passed by value if th...
static cl::opt< bool > EnableSimpleLoopUnswitch("enable-simple-loop-unswitch", cl::init(false), cl::Hidden, cl::desc("Enable the simple loop unswitch pass."))
static cl::opt< bool > EnablePrepareForThinLTO("prepare-for-thinlto", cl::init(false), cl::Hidden, cl::desc("Enable preparation for ThinLTO."))
FunctionPass * createSCCPPass()
Definition: SCCP.cpp:1791
std::function< void(const PassManagerBuilder &Builder, legacy::PassManagerBase &PM)> ExtensionFn
Extensions are passed the builder itself (so they can see how it is configured) as well as the pass m...
unsigned OptLevel
The Optimization Level - Specify the basic optimization level.
static cl::opt< bool > UseGVNAfterVectorization("use-gvn-after-vectorization", cl::init(false), cl::Hidden, cl::desc("Run GVN instead of Early CSE after vectorization passes"))
Pass * createLoopVectorizePass(bool NoUnrolling=false, bool AlwaysVectorize=true)
void populateModulePassManager(legacy::PassManagerBase &MPM)
populateModulePassManager - This sets up the primary pass manager.
static cl::opt< bool > DisablePreInliner("disable-preinline", cl::init(false), cl::Hidden, cl::desc("Disable pre-instrumentation inliner"))
ModulePass * createCalledValuePropagationPass()
createCalledValuePropagationPass - Attach metadata to indirct call sites indicating the set of functi...
void add(Pass *P) override
Add a pass to the queue of passes to run.
static ManagedStatic< SmallVector< std::pair< PassManagerBuilder::ExtensionPointTy, PassManagerBuilder::ExtensionFn >, 8 > > GlobalExtensions
Set of global extensions, automatically added as part of the standard set.
static cl::opt< bool > RunSLPVectorization("vectorize-slp", cl::Hidden, cl::desc("Run the SLP vectorization passes"))
void LLVMPassManagerBuilderSetSizeLevel(LLVMPassManagerBuilderRef PMB, unsigned SizeLevel)
See llvm::PassManagerBuilder::SizeLevel.
ModulePass * createSampleProfileLoaderPass()
FunctionPass * createInstructionCombiningPass(bool ExpensiveCombines=true)
ModulePass * createGlobalDCEPass()
createGlobalDCEPass - This transform is designed to eliminate unreachable internal globals (functions...
Pass * createCorrelatedValuePropagationPass()
struct LLVMOpaquePassManagerBuilder * LLVMPassManagerBuilderRef
#define P(N)
This is the interface for LLVM&#39;s unification-based alias analysis implemented with CFL graph reachabi...
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:406
static const struct @364 Extensions[]
This is the interface for a metadata-based TBAA.
FunctionPass * createTailCallEliminationPass()
This file provides the interface for LLVM&#39;s Global Value Numbering pass which eliminates fully redund...
ValuesClass values(OptsTy... Options)
Helper to build a ValuesClass by forwarding a variable number of arguments as an initializer list to ...
Definition: CommandLine.h:626
FunctionPass * createPromoteMemoryToRegisterPass()
Definition: Mem2Reg.cpp:114
ModulePass * createDeadArgEliminationPass()
createDeadArgEliminationPass - This pass removes arguments from functions which are not used by the b...
void LLVMPassManagerBuilderDispose(LLVMPassManagerBuilderRef PMB)
Pass * createLICMPass()
Definition: LICM.cpp:223
FunctionPass * createDivRemPairsPass()
FunctionPass * createDeadStoreEliminationPass()
ModulePass * createLowerTypeTestsPass(ModuleSummaryIndex *ExportSummary, const ModuleSummaryIndex *ImportSummary)
This pass lowers type metadata and the llvm.type.test intrinsic to bitsets.
ModulePass * createPGOInstrumentationUseLegacyPass(StringRef Filename=StringRef(""))
ModulePass * createBarrierNoopPass()
createBarrierNoopPass - This pass is purely a module pass barrier in a pass manager.
FunctionPass * createMemCpyOptPass()
The public interface to this file...
FunctionPass * createBitTrackingDCEPass()
Definition: BDCE.cpp:173
ModulePass * createConstantMergePass()
createConstantMergePass - This function returns a new pass that merges duplicate global constants tog...
Pass * createLoopSinkPass()
ModulePass * createGlobalOptimizerPass()
createGlobalOptimizerPass - This function returns a new pass that optimizes non-address taken interna...
Definition: GlobalOpt.cpp:2725
Pass * createReversePostOrderFunctionAttrsPass()
createReversePostOrderFunctionAttrsPass - This pass walks SCCs of the call graph in RPO to deduce and...
void populateFunctionPassManager(legacy::FunctionPassManager &FPM)
populateFunctionPassManager - This fills in the function pass manager, which is expected to be run on...
FunctionPassManager manages FunctionPasses and BasicBlockPassManagers.
int LLVMBool
Definition: Types.h:29
Pass * createPostOrderFunctionAttrsLegacyPass()
Create a legacy pass manager instance of a pass to compute function attrs in post-order.
std::string InstrProfileOutput
Pass * createLoopVersioningLICMPass()
ModulePass * createGlobalSplitPass()
This pass splits globals into pieces for the benefit of whole-program devirtualization and control-fl...
static cl::opt< bool > EnableLoopInterchange("enable-loopinterchange", cl::init(false), cl::Hidden, cl::desc("Enable the new, experimental LoopInterchange Pass"))
unsigned first
Pass * createLoopInterchangePass()
PassManagerBase - An abstract interface to allow code to add passes to a pass manager without having ...
This is a &#39;vector&#39; (really, a variable-sized array), optimized for the case when the array is small...
Definition: SmallVector.h:864
FunctionPass * createLoopLoadEliminationPass()
static cl::opt< bool > RunSLPAfterLoopVectorization("run-slp-after-loop-vectorization", cl::init(true), cl::Hidden, cl::desc("Run the SLP vectorizer (and BB vectorizer) after the Loop " "vectorizer instead of before"))
Pass * createSimpleLoopUnswitchLegacyPass(bool NonTrivial=false)
Create the legacy pass object for the simple loop unswitcher.
static cl::opt< CFLAAType > UseCFLAA("use-cfl-aa", cl::init(CFLAAType::None), cl::Hidden, cl::desc("Enable the new, experimental CFL alias analysis"), cl::values(clEnumValN(CFLAAType::None, "none", "Disable CFL-AA"), clEnumValN(CFLAAType::Steensgaard, "steens", "Enable unification-based CFL-AA"), clEnumValN(CFLAAType::Andersen, "anders", "Enable inclusion-based CFL-AA"), clEnumValN(CFLAAType::Both, "both", "Enable both variants of CFL-AA")))
FunctionPass * createSpeculativeExecutionIfHasBranchDivergencePass()
FunctionPass * createMergedLoadStoreMotionPass()
createMergedLoadStoreMotionPass - The public interface to this file.
FunctionPass * createLibCallsShrinkWrapPass()
struct LLVMOpaquePassManager * LLVMPassManagerRef
Definition: Types.h:114
Pass * createLoopDeletionPass()
Pass * createLoopUnswitchPass(bool OptimizeForSize=false, bool hasBranchDivergence=false)
Options for the frontend instrumentation based profiling pass.
static cl::opt< bool > EnableGVNSink("enable-gvn-sink", cl::init(false), cl::Hidden, cl::desc("Enable the GVN sinking pass (default = off)"))
Pass * createLoopIdiomPass()
#define clEnumValN(ENUMVAL, FLAGNAME, DESC)
Definition: CommandLine.h:601
ModulePass * createWholeProgramDevirtPass(ModuleSummaryIndex *ExportSummary, const ModuleSummaryIndex *ImportSummary)
This pass implements whole-program devirtualization using type metadata.
Interfaces for passes which infer implicit function attributes from the name and signature of functio...
LLVMPassManagerBuilderRef LLVMPassManagerBuilderCreate()
See llvm::PassManagerBuilder.
void LLVMPassManagerBuilderPopulateModulePassManager(LLVMPassManagerBuilderRef PMB, LLVMPassManagerRef PM)
See llvm::PassManagerBuilder::populateModulePassManager.
LLVMAttributeRef wrap(Attribute Attr)
Definition: Attributes.h:190
unsigned SizeLevel
SizeLevel - How much we&#39;re optimizing for size.
static cl::opt< bool > DisableLibCallsShrinkWrap("disable-libcalls-shrinkwrap", cl::init(false), cl::Hidden, cl::desc("Disable shrink-wrap library calls"))
FunctionPass * createGVNSinkPass()
Definition: GVNSink.cpp:926
ModulePass * createGlobalsAAWrapperPass()
FunctionPass * createSROAPass()
Definition: SROA.cpp:4386
Pass * createInferFunctionAttrsLegacyPass()
Create a legacy pass manager instance of a pass to infer function attributes.
static bool GlobalExtensionsNotEmpty()
Check if GlobalExtensions is constructed and not empty.
Provides passes for computing function attributes based on interprocedural analyses.
ImmutablePass * createCFLSteensAAWrapperPass()
ImmutablePass * createTypeBasedAAWrapperPass()
Pass * createSLPVectorizerPass()
static int const Threshold
TODO: Write a new FunctionPass AliasAnalysis so that it can keep a cache.
ModuleSummaryIndex.h This file contains the declarations the classes that hold the module index and s...
void LLVMPassManagerBuilderSetDisableUnitAtATime(LLVMPassManagerBuilderRef PMB, LLVMBool Value)
See llvm::PassManagerBuilder::DisableUnitAtATime.
Pass * createFunctionInliningPass()
createFunctionInliningPass - Return a new pass object that uses a heuristic to inline direct function...
Pass * createPruneEHPass()
createPruneEHPass - Return a new pass object which transforms invoke instructions into calls...
Definition: PruneEH.cpp:62
LLVM Value Representation.
Definition: Value.h:73
FunctionPass * createEarlyCSEPass(bool UseMemorySSA=false)
Definition: EarlyCSE.cpp:1140
static cl::opt< int > PreInlineThreshold("preinline-threshold", cl::Hidden, cl::init(75), cl::ZeroOrMore, cl::desc("Control the amount of inlining in pre-instrumentation inliner " "(default = 75)"))
FunctionPass * createNewGVNPass()
Definition: NewGVN.cpp:4232
This is the interface for LLVM&#39;s primary stateless and local alias analysis.
static cl::opt< bool > RunPartialInlining("enable-partial-inlining", cl::init(false), cl::Hidden, cl::ZeroOrMore, cl::desc("Run Partial inlinining pass"))
ManagedStatic - This transparently changes the behavior of global statics to be lazily constructed on...
Definition: ManagedStatic.h:61
void LLVMPassManagerBuilderPopulateFunctionPassManager(LLVMPassManagerBuilderRef PMB, LLVMPassManagerRef PM)
See llvm::PassManagerBuilder::populateFunctionPassManager.
ImmutablePass * createCFLAndersAAWrapperPass()
void addExtension(ExtensionPointTy Ty, ExtensionFn Fn)
FunctionPass * createEntryExitInstrumenterPass()
FunctionPass * createInstructionSimplifierPass()
ModulePass * createPGOIndirectCallPromotionLegacyPass(bool InLTO=false, bool SamplePGO=false)
Pass * createForceFunctionAttrsLegacyPass()
Create a legacy pass manager instance of a pass to force function attrs.
Pass * createLoopRotatePass(int MaxHeaderSize=-1)
Pass * createIndVarSimplifyPass()
FunctionPass * createAggressiveDCEPass()
Definition: ADCE.cpp:730
int DefaultThreshold
The default threshold to start with for a callee.
Definition: InlineCost.h:132
FunctionPass * createLoopDistributePass()
FunctionPass * createLowerExpectIntrinsicPass()
static cl::opt< bool > RunLoopRerolling("reroll-loops", cl::Hidden, cl::desc("Run the loop rerolling pass"))
static cl::opt< bool > RunNewGVN("enable-newgvn", cl::init(false), cl::Hidden, cl::desc("Run the NewGVN pass"))
void LLVMPassManagerBuilderUseInlinerWithThreshold(LLVMPassManagerBuilderRef PMB, unsigned Threshold)
See llvm::PassManagerBuilder::Inliner.
FunctionPass * createCallSiteSplittingPass()