diff options
Diffstat (limited to 'llvm/lib/Transforms/IPO/PassManagerBuilder.cpp')
| -rw-r--r-- | llvm/lib/Transforms/IPO/PassManagerBuilder.cpp | 354 |
1 files changed, 2 insertions, 352 deletions
diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp index f1b6f2bb7de4..6b91c8494f39 100644 --- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -15,8 +15,6 @@ #include "llvm-c/Transforms/PassManagerBuilder.h" #include "llvm/ADT/STLExtras.h" #include "llvm/ADT/SmallVector.h" -#include "llvm/Analysis/CFLAndersAliasAnalysis.h" -#include "llvm/Analysis/CFLSteensAliasAnalysis.h" #include "llvm/Analysis/GlobalsModRef.h" #include "llvm/Analysis/ScopedNoAliasAA.h" #include "llvm/Analysis/TargetLibraryInfo.h" @@ -43,129 +41,6 @@ using namespace llvm; -namespace llvm { -cl::opt<bool> RunPartialInlining("enable-partial-inlining", cl::Hidden, - cl::desc("Run Partial inlinining pass")); - -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")); - -cl::opt<bool> ExtraVectorizerPasses( - "extra-vectorizer-passes", cl::init(false), cl::Hidden, - cl::desc("Run cleanup optimization passes after vectorization.")); - -static cl::opt<bool> -RunLoopRerolling("reroll-loops", cl::Hidden, - cl::desc("Run the loop rerolling pass")); - -cl::opt<bool> RunNewGVN("enable-newgvn", cl::init(false), cl::Hidden, - cl::desc("Run the NewGVN pass")); - -// Experimental option to use CFL-AA -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"))); - -cl::opt<bool> EnableLoopInterchange( - "enable-loopinterchange", cl::init(false), cl::Hidden, - cl::desc("Enable the experimental LoopInterchange Pass")); - -cl::opt<bool> EnableUnrollAndJam("enable-unroll-and-jam", cl::init(false), - cl::Hidden, - cl::desc("Enable Unroll And Jam Pass")); - -cl::opt<bool> EnableLoopFlatten("enable-loop-flatten", cl::init(false), - cl::Hidden, - cl::desc("Enable the LoopFlatten Pass")); - -cl::opt<bool> EnableDFAJumpThreading("enable-dfa-jump-thread", - cl::desc("Enable DFA jump threading."), - cl::init(false), cl::Hidden); - -cl::opt<bool> EnableHotColdSplit("hot-cold-split", - cl::desc("Enable hot-cold splitting pass")); - -cl::opt<bool> EnableIROutliner("ir-outliner", cl::init(false), cl::Hidden, - cl::desc("Enable ir outliner pass")); - -static cl::opt<bool> UseLoopVersioningLICM( - "enable-loop-versioning-licm", cl::init(false), cl::Hidden, - cl::desc("Enable the experimental Loop Versioning LICM pass")); - -cl::opt<bool> - DisablePreInliner("disable-preinline", cl::init(false), cl::Hidden, - cl::desc("Disable pre-instrumentation inliner")); - -cl::opt<int> PreInlineThreshold( - "preinline-threshold", cl::Hidden, cl::init(75), - cl::desc("Control the amount of inlining in pre-instrumentation inliner " - "(default = 75)")); - -cl::opt<bool> - EnableGVNHoist("enable-gvn-hoist", - cl::desc("Enable the GVN hoisting pass (default = off)")); - -static cl::opt<bool> - DisableLibCallsShrinkWrap("disable-libcalls-shrinkwrap", cl::init(false), - cl::Hidden, - cl::desc("Disable shrink-wrap library calls")); - -cl::opt<bool> - EnableGVNSink("enable-gvn-sink", - cl::desc("Enable the GVN sinking pass (default = off)")); - -// This option is used in simplifying testing SampleFDO optimizations for -// profile loading. -cl::opt<bool> - EnableCHR("enable-chr", cl::init(true), cl::Hidden, - cl::desc("Enable control height reduction optimization (CHR)")); - -cl::opt<bool> FlattenedProfileUsed( - "flattened-profile-used", cl::init(false), cl::Hidden, - cl::desc("Indicate the sample profile being used is flattened, i.e., " - "no inline hierachy exists in the profile. ")); - -cl::opt<bool> EnableOrderFileInstrumentation( - "enable-order-file-instrumentation", cl::init(false), cl::Hidden, - cl::desc("Enable order file instrumentation (default = off)")); - -cl::opt<bool> EnableMatrix( - "enable-matrix", cl::init(false), cl::Hidden, - cl::desc("Enable lowering of the matrix intrinsics")); - -cl::opt<bool> EnableConstraintElimination( - "enable-constraint-elimination", cl::init(false), cl::Hidden, - cl::desc( - "Enable pass to eliminate conditions based on linear constraints.")); - -cl::opt<bool> EnableFunctionSpecialization( - "enable-function-specialization", cl::init(false), cl::Hidden, - cl::desc("Enable Function Specialization pass")); - -cl::opt<AttributorRunOption> AttributorRun( - "attributor-enable", cl::Hidden, cl::init(AttributorRunOption::NONE), - cl::desc("Enable the attributor inter-procedural deduction pass."), - cl::values(clEnumValN(AttributorRunOption::ALL, "all", - "enable all attributor runs"), - clEnumValN(AttributorRunOption::MODULE, "module", - "enable module-wide attributor runs"), - clEnumValN(AttributorRunOption::CGSCC, "cgscc", - "enable call graph SCC attributor runs"), - clEnumValN(AttributorRunOption::NONE, "none", - "disable attributor runs"))); - -extern cl::opt<bool> EnableKnowledgeRetention; -} // namespace llvm - PassManagerBuilder::PassManagerBuilder() { OptLevel = 2; SizeLevel = 0; @@ -175,8 +50,6 @@ PassManagerBuilder::PassManagerBuilder() { SLPVectorize = false; LoopVectorize = true; LoopsInterleaved = true; - RerollLoops = RunLoopRerolling; - NewGVN = RunNewGVN; LicmMssaOptCap = SetLicmMssaOptCap; LicmMssaNoAccForPromotionCap = SetLicmMssaNoAccForPromotionCap; DisableGVNLoadPRE = false; @@ -193,81 +66,8 @@ PassManagerBuilder::~PassManagerBuilder() { delete Inliner; } -/// Set of global extensions, automatically added as part of the standard set. -static ManagedStatic< - SmallVector<std::tuple<PassManagerBuilder::ExtensionPointTy, - PassManagerBuilder::ExtensionFn, - PassManagerBuilder::GlobalExtensionID>, - 8>> - GlobalExtensions; -static PassManagerBuilder::GlobalExtensionID GlobalExtensionsCounter; - -/// Check if GlobalExtensions is constructed and not empty. -/// Since GlobalExtensions is a managed static, calling 'empty()' will trigger -/// the construction of the object. -static bool GlobalExtensionsNotEmpty() { - return GlobalExtensions.isConstructed() && !GlobalExtensions->empty(); -} - -PassManagerBuilder::GlobalExtensionID -PassManagerBuilder::addGlobalExtension(PassManagerBuilder::ExtensionPointTy Ty, - PassManagerBuilder::ExtensionFn Fn) { - auto ExtensionID = GlobalExtensionsCounter++; - GlobalExtensions->push_back(std::make_tuple(Ty, std::move(Fn), ExtensionID)); - return ExtensionID; -} - -void PassManagerBuilder::removeGlobalExtension( - PassManagerBuilder::GlobalExtensionID ExtensionID) { - // RegisterStandardPasses may try to call this function after GlobalExtensions - // has already been destroyed; doing so should not generate an error. - if (!GlobalExtensions.isConstructed()) - return; - - auto GlobalExtension = - llvm::find_if(*GlobalExtensions, [ExtensionID](const auto &elem) { - return std::get<2>(elem) == ExtensionID; - }); - assert(GlobalExtension != GlobalExtensions->end() && - "The extension ID to be removed should always be valid."); - - GlobalExtensions->erase(GlobalExtension); -} - -void PassManagerBuilder::addExtension(ExtensionPointTy Ty, ExtensionFn Fn) { - Extensions.push_back(std::make_pair(Ty, std::move(Fn))); -} - -void PassManagerBuilder::addExtensionsToPM(ExtensionPointTy ETy, - legacy::PassManagerBase &PM) const { - if (GlobalExtensionsNotEmpty()) { - for (auto &Ext : *GlobalExtensions) { - if (std::get<0>(Ext) == ETy) - std::get<1>(Ext)(*this, PM); - } - } - for (unsigned i = 0, e = Extensions.size(); i != e; ++i) - if (Extensions[i].first == ETy) - Extensions[i].second(*this, PM); -} - void PassManagerBuilder::addInitialAliasAnalysisPasses( legacy::PassManagerBase &PM) const { - switch (UseCFLAA) { - case ::CFLAAType::Steensgaard: - PM.add(createCFLSteensAAWrapperPass()); - break; - case ::CFLAAType::Andersen: - PM.add(createCFLAndersAAWrapperPass()); - break; - case ::CFLAAType::Both: - PM.add(createCFLSteensAAWrapperPass()); - PM.add(createCFLAndersAAWrapperPass()); - break; - default: - break; - } - // Add TypeBasedAliasAnalysis before BasicAliasAnalysis so that // BasicAliasAnalysis wins if they disagree. This is intended to help // support "obvious" type-punning idioms. @@ -277,19 +77,10 @@ void PassManagerBuilder::addInitialAliasAnalysisPasses( void PassManagerBuilder::populateFunctionPassManager( legacy::FunctionPassManager &FPM) { - addExtensionsToPM(EP_EarlyAsPossible, FPM); - // Add LibraryInfo if we have some. if (LibraryInfo) FPM.add(new TargetLibraryInfoWrapperPass(*LibraryInfo)); - // The backends do not handle matrix intrinsics currently. - // Make sure they are also lowered in O0. - // FIXME: A lightweight version of the pass should run in the backend - // pipeline on demand. - if (EnableMatrix && OptLevel == 0) - FPM.add(createLowerMatrixIntrinsicsMinimalPass()); - if (OptLevel == 0) return; addInitialAliasAnalysisPasses(FPM); @@ -309,21 +100,6 @@ void PassManagerBuilder::addFunctionSimplificationPasses( assert(OptLevel >= 1 && "Calling function optimizer with no optimization level!"); MPM.add(createSROAPass()); MPM.add(createEarlyCSEPass(true /* Enable mem-ssa. */)); // Catch trivial redundancies - if (EnableKnowledgeRetention) - MPM.add(createAssumeSimplifyPass()); - - if (OptLevel > 1) { - if (EnableGVNHoist) - MPM.add(createGVNHoistPass()); - if (EnableGVNSink) { - MPM.add(createGVNSinkPass()); - MPM.add(createCFGSimplificationPass( - SimplifyCFGOptions().convertSwitchRangeToICmp(true))); - } - } - - if (EnableConstraintElimination) - MPM.add(createConstraintEliminationPass()); if (OptLevel > 1) { // Speculative execution if the target has divergent branches; otherwise nop. @@ -336,12 +112,9 @@ void PassManagerBuilder::addFunctionSimplificationPasses( createCFGSimplificationPass(SimplifyCFGOptions().convertSwitchRangeToICmp( true))); // Merge & remove BBs // Combine silly seq's - if (OptLevel > 2) - MPM.add(createAggressiveInstCombinerPass()); MPM.add(createInstructionCombiningPass()); - if (SizeLevel == 0 && !DisableLibCallsShrinkWrap) + if (SizeLevel == 0) MPM.add(createLibCallsShrinkWrapPass()); - addExtensionsToPM(EP_Peephole, MPM); // TODO: Investigate the cost/benefit of tail call elimination on debugging. if (OptLevel > 1) @@ -351,11 +124,6 @@ void PassManagerBuilder::addFunctionSimplificationPasses( true))); // Merge & remove BBs MPM.add(createReassociatePass()); // Reassociate expressions - // The matrix extension can introduce large vector operations early, which can - // benefit from running vector-combine early on. - if (EnableMatrix) - MPM.add(createVectorCombinePass()); - // Begin the loop pass pipeline. // The simple loop unswitch pass relies on separate cleanup passes. Schedule @@ -385,22 +153,13 @@ void PassManagerBuilder::addFunctionSimplificationPasses( SimplifyCFGOptions().convertSwitchRangeToICmp(true))); MPM.add(createInstructionCombiningPass()); // We resume loop passes creating a second loop pipeline here. - if (EnableLoopFlatten) { - MPM.add(createLoopFlattenPass()); // Flatten loops - MPM.add(createLoopSimplifyCFGPass()); - } MPM.add(createLoopIdiomPass()); // Recognize idioms like memset. MPM.add(createIndVarSimplifyPass()); // Canonicalize indvars - addExtensionsToPM(EP_LateLoopOptimizations, MPM); MPM.add(createLoopDeletionPass()); // Delete dead loops - if (EnableLoopInterchange) - MPM.add(createLoopInterchangePass()); // Interchange loops - // Unroll small loops and perform peeling. MPM.add(createSimpleLoopUnrollPass(OptLevel, DisableUnrollLoops, ForgetAllSCEVInLoopUnroll)); - addExtensionsToPM(EP_LoopOptimizerEnd, MPM); // This ends the loop pass pipelines. // Break up allocas that may now be splittable after loop unrolling. @@ -408,14 +167,10 @@ void PassManagerBuilder::addFunctionSimplificationPasses( if (OptLevel > 1) { MPM.add(createMergedLoadStoreMotionPass()); // Merge ld/st in diamonds - MPM.add(NewGVN ? createNewGVNPass() - : createGVNPass(DisableGVNLoadPRE)); // Remove redundancies + MPM.add(createGVNPass(DisableGVNLoadPRE)); // Remove redundancies } MPM.add(createSCCPPass()); // Constant prop with SCCP - if (EnableConstraintElimination) - MPM.add(createConstraintEliminationPass()); - // Delete dead bit computations (instcombine runs after to fold away the dead // computations, and then ADCE will run later to exploit any new DCE // opportunities that creates). @@ -424,11 +179,7 @@ void PassManagerBuilder::addFunctionSimplificationPasses( // Run instcombine after redundancy elimination to exploit opportunities // opened up by them. MPM.add(createInstructionCombiningPass()); - addExtensionsToPM(EP_Peephole, MPM); if (OptLevel > 1) { - if (EnableDFAJumpThreading && SizeLevel == 0) - MPM.add(createDFAJumpThreadingPass()); - MPM.add(createJumpThreadingPass()); // Thread jumps MPM.add(createCorrelatedValuePropagationPass()); } @@ -442,17 +193,11 @@ void PassManagerBuilder::addFunctionSimplificationPasses( /*AllowSpeculation=*/true)); } - addExtensionsToPM(EP_ScalarOptimizerLate, MPM); - - if (RerollLoops) - MPM.add(createLoopRerollPass()); - // Merge & remove BBs and sink & hoist common instructions. MPM.add(createCFGSimplificationPass( SimplifyCFGOptions().hoistCommonInsts(true).sinkCommonInsts(true))); // Clean up after everything. MPM.add(createInstructionCombiningPass()); - addExtensionsToPM(EP_Peephole, MPM); } /// FIXME: Should LTO cause any differences to this set of passes? @@ -468,9 +213,6 @@ void PassManagerBuilder::addVectorPasses(legacy::PassManagerBase &PM, // FIXME: It would be really good to use a loop-integrated instruction // combiner for cleanup here so that the unrolling and LICM can be pipelined // across the loop nests. - // We do UnrollAndJam in a separate LPM to ensure it happens before unroll - if (EnableUnrollAndJam && !DisableUnrollLoops) - PM.add(createLoopUnrollAndJamPass(OptLevel)); PM.add(createLoopUnrollPass(OptLevel, DisableUnrollLoops, ForgetAllSCEVInLoopUnroll)); PM.add(createWarnMissedTransformationsPass()); @@ -484,24 +226,6 @@ void PassManagerBuilder::addVectorPasses(legacy::PassManagerBase &PM, // Cleanup after the loop optimization passes. PM.add(createInstructionCombiningPass()); - if (OptLevel > 1 && ExtraVectorizerPasses) { - // At higher optimization levels, try to clean up any runtime overlap and - // alignment checks inserted by the vectorizer. We want to track correlated - // runtime checks for two inner loops in the same outer loop, fold any - // common computations, hoist loop-invariant aspects out of any outer loop, - // and unswitch the runtime checks if possible. Once hoisted, we may have - // dead (or speculatable) control flows or more combining opportunities. - PM.add(createEarlyCSEPass()); - PM.add(createCorrelatedValuePropagationPass()); - PM.add(createInstructionCombiningPass()); - PM.add(createLICMPass(LicmMssaOptCap, LicmMssaNoAccForPromotionCap, - /*AllowSpeculation=*/true)); - PM.add(createSimpleLoopUnswitchLegacyPass()); - PM.add(createCFGSimplificationPass( - SimplifyCFGOptions().convertSwitchRangeToICmp(true))); - PM.add(createInstructionCombiningPass()); - } - // Now that we've formed fast to execute loop structures, we do further // optimizations. These are run afterward as they might block doing complex // analyses and transforms such as what are needed for loop vectorization. @@ -528,24 +252,14 @@ void PassManagerBuilder::addVectorPasses(legacy::PassManagerBase &PM, // Optimize parallel scalar instruction chains into SIMD instructions. if (SLPVectorize) { PM.add(createSLPVectorizerPass()); - if (OptLevel > 1 && ExtraVectorizerPasses) - PM.add(createEarlyCSEPass()); } // Enhance/cleanup vector code. PM.add(createVectorCombinePass()); if (!IsFullLTO) { - addExtensionsToPM(EP_Peephole, PM); PM.add(createInstructionCombiningPass()); - if (EnableUnrollAndJam && !DisableUnrollLoops) { - // Unroll and Jam. We do this before unroll but need to be in a separate - // loop pass manager in order for the outer loop to be processed by - // unroll and jam before the inner loop is unrolled. - PM.add(createLoopUnrollAndJamPass(OptLevel)); - } - // Unroll small loops PM.add(createLoopUnrollPass(OptLevel, DisableUnrollLoops, ForgetAllSCEVInLoopUnroll)); @@ -595,12 +309,6 @@ void PassManagerBuilder::populateModulePassManager( // builds. The function merging pass is if (MergeFunctions) MPM.add(createMergeFunctionsPass()); - else if (GlobalExtensionsNotEmpty() || !Extensions.empty()) - MPM.add(createBarrierNoopPass()); - - addExtensionsToPM(EP_EnabledOnOptLevel0, MPM); - - MPM.add(createAnnotationRemarksLegacyPass()); return; } @@ -613,19 +321,9 @@ void PassManagerBuilder::populateModulePassManager( // Infer attributes about declarations if possible. MPM.add(createInferFunctionAttrsLegacyPass()); - // Infer attributes on declarations, call sites, arguments, etc. - if (AttributorRun & AttributorRunOption::MODULE) - MPM.add(createAttributorLegacyPass()); - - addExtensionsToPM(EP_ModuleOptimizerEarly, MPM); - if (OptLevel > 2) MPM.add(createCallSiteSplittingPass()); - // Propage constant function arguments by specializing the functions. - if (OptLevel > 2 && EnableFunctionSpecialization) - MPM.add(createFunctionSpecializationPass()); - MPM.add(createIPSCCPPass()); // IP SCCP MPM.add(createCalledValuePropagationPass()); @@ -636,7 +334,6 @@ void PassManagerBuilder::populateModulePassManager( MPM.add(createDeadArgEliminationPass()); // Dead argument elimination MPM.add(createInstructionCombiningPass()); // Clean up after IPCP & DAE - addExtensionsToPM(EP_Peephole, MPM); MPM.add( createCFGSimplificationPass(SimplifyCFGOptions().convertSwitchRangeToICmp( true))); // Clean up after IPCP & DAE @@ -647,7 +344,6 @@ void PassManagerBuilder::populateModulePassManager( MPM.add(createGlobalsAAWrapperPass()); // Start of CallGraph SCC passes. - MPM.add(createPruneEHPass()); // Remove dead EH info bool RunInliner = false; if (Inliner) { MPM.add(Inliner); @@ -655,18 +351,8 @@ void PassManagerBuilder::populateModulePassManager( RunInliner = true; } - // Infer attributes on declarations, call sites, arguments, etc. for an SCC. - if (AttributorRun & AttributorRunOption::CGSCC) - MPM.add(createAttributorCGSCCLegacyPass()); - - // Try to perform OpenMP specific optimizations. This is a (quick!) no-op if - // there are no OpenMP runtime calls present in the module. - if (OptLevel > 1) - MPM.add(createOpenMPOptCGSCCLegacyPass()); - MPM.add(createPostOrderFunctionAttrsLegacyPass()); - addExtensionsToPM(EP_CGSCCOptimizerLate, MPM); addFunctionSimplificationPasses(MPM); // FIXME: This is a HACK! The inliner pass above implicitly creates a CGSCC @@ -674,9 +360,6 @@ void PassManagerBuilder::populateModulePassManager( // we must insert a no-op module pass to reset the pass manager. MPM.add(createBarrierNoopPass()); - if (RunPartialInlining) - MPM.add(createPartialInliningPass()); - if (OptLevel > 1) // Remove avail extern fns and globals definitions if we aren't // compiling an object file for later LTO. For LTO we want to preserve @@ -702,17 +385,6 @@ void PassManagerBuilder::populateModulePassManager( MPM.add(createGlobalDCEPass()); } - // Scheduling LoopVersioningLICM when inlining is over, because after that - // we may see more accurate aliasing. Reason to run this late is that too - // early versioning may prevent further inlining due to increase of code - // size. By placing it just after inlining other optimizations which runs - // later might get benefit of no-alias assumption in clone loop. - if (UseLoopVersioningLICM) { - MPM.add(createLoopVersioningLICMPass()); // Do LoopVersioningLICM - MPM.add(createLICMPass(LicmMssaOptCap, LicmMssaNoAccForPromotionCap, - /*AllowSpeculation=*/true)); - } - // We add a fresh GlobalsModRef run at this point. This is particularly // useful as the above will have inlined, DCE'ed, and function-attr // propagated everything. We should at this point have a reasonably minimal @@ -733,16 +405,6 @@ void PassManagerBuilder::populateModulePassManager( MPM.add(createFloat2IntPass()); MPM.add(createLowerConstantIntrinsicsPass()); - if (EnableMatrix) { - MPM.add(createLowerMatrixIntrinsicsPass()); - // CSE the pointer arithmetic of the column vectors. This allows alias - // analysis to establish no-aliasing between loads and stores of different - // columns of the same matrix. - MPM.add(createEarlyCSEPass(false)); - } - - addExtensionsToPM(EP_VectorizerStart, MPM); - // Re-rotate loops in all our loop nests. These may have fallout out of // rotated form due to GVN or other transformations, and the vectorizer relies // on the rotated form. Disable header duplication at -Oz. @@ -766,14 +428,6 @@ void PassManagerBuilder::populateModulePassManager( MPM.add(createConstantMergePass()); // Merge dup global constants } - // See comment in the new PM for justification of scheduling splitting at - // this stage (\ref buildModuleSimplificationPipeline). - if (EnableHotColdSplit) - MPM.add(createHotColdSplittingPass()); - - if (EnableIROutliner) - MPM.add(createIROutlinerPass()); - if (MergeFunctions) MPM.add(createMergeFunctionsPass()); @@ -794,10 +448,6 @@ void PassManagerBuilder::populateModulePassManager( // resulted in single-entry-single-exit or empty blocks. Clean up the CFG. MPM.add(createCFGSimplificationPass( SimplifyCFGOptions().convertSwitchRangeToICmp(true))); - - addExtensionsToPM(EP_OptimizerLast, MPM); - - MPM.add(createAnnotationRemarksLegacyPass()); } LLVMPassManagerBuilderRef LLVMPassManagerBuilderCreate() { |