Move methods in PassManagerBuilder offline.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136727 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/PassManagerBuilder.cpp b/lib/Transforms/IPO/PassManagerBuilder.cpp
new file mode 100644
index 0000000..cf2f262
--- /dev/null
+++ b/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -0,0 +1,248 @@
+//===- PassManagerBuilder.cpp - Build Standard Pass -----------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the PassManagerBuilder class, which is used to set up a
+// "standard" optimization sequence suitable for languages like C and C++.
+//
+//===----------------------------------------------------------------------===//
+
+
+#include "llvm/Transforms/IPO/PassManagerBuilder.h"
+
+#include "llvm/PassManager.h"
+#include "llvm/DefaultPasses.h"
+#include "llvm/PassManager.h"
+#include "llvm/Analysis/Passes.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Target/TargetLibraryInfo.h"
+#include "llvm/Transforms/Scalar.h"
+#include "llvm/Transforms/IPO.h"
+
+using namespace llvm;
+
+PassManagerBuilder::PassManagerBuilder() {
+ OptLevel = 2;
+ SizeLevel = 0;
+ LibraryInfo = 0;
+ Inliner = 0;
+ DisableSimplifyLibCalls = false;
+ DisableUnitAtATime = false;
+ DisableUnrollLoops = false;
+}
+
+PassManagerBuilder::~PassManagerBuilder() {
+ delete LibraryInfo;
+ delete Inliner;
+}
+
+void PassManagerBuilder::addExtension(ExtensionPointTy Ty, ExtensionFn Fn) {
+ Extensions.push_back(std::make_pair(Ty, Fn));
+}
+
+void PassManagerBuilder::addExtensionsToPM(ExtensionPointTy ETy,
+ PassManagerBase &PM) const {
+ for (unsigned i = 0, e = Extensions.size(); i != e; ++i)
+ if (Extensions[i].first == ETy)
+ Extensions[i].second(*this, PM);
+}
+
+void
+PassManagerBuilder::addInitialAliasAnalysisPasses(PassManagerBase &PM) const {
+ // Add TypeBasedAliasAnalysis before BasicAliasAnalysis so that
+ // BasicAliasAnalysis wins if they disagree. This is intended to help
+ // support "obvious" type-punning idioms.
+ PM.add(createTypeBasedAliasAnalysisPass());
+ PM.add(createBasicAliasAnalysisPass());
+}
+
+void PassManagerBuilder::populateFunctionPassManager(FunctionPassManager &FPM) {
+ addExtensionsToPM(EP_EarlyAsPossible, FPM);
+
+ // Add LibraryInfo if we have some.
+ if (LibraryInfo) FPM.add(new TargetLibraryInfo(*LibraryInfo));
+
+ if (OptLevel == 0) return;
+
+ addInitialAliasAnalysisPasses(FPM);
+
+ FPM.add(createCFGSimplificationPass());
+ FPM.add(createScalarReplAggregatesPass());
+ FPM.add(createEarlyCSEPass());
+ FPM.add(createLowerExpectIntrinsicPass());
+}
+
+void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
+ // If all optimizations are disabled, just run the always-inline pass.
+ if (OptLevel == 0) {
+ if (Inliner) {
+ MPM.add(Inliner);
+ Inliner = 0;
+ }
+ return;
+ }
+
+ // Add LibraryInfo if we have some.
+ if (LibraryInfo) MPM.add(new TargetLibraryInfo(*LibraryInfo));
+
+ addInitialAliasAnalysisPasses(MPM);
+
+ if (!DisableUnitAtATime) {
+ MPM.add(createGlobalOptimizerPass()); // Optimize out global vars
+
+ MPM.add(createIPSCCPPass()); // IP SCCP
+ MPM.add(createDeadArgEliminationPass()); // Dead argument elimination
+
+ MPM.add(createInstructionCombiningPass());// Clean up after IPCP & DAE
+ MPM.add(createCFGSimplificationPass()); // Clean up after IPCP & DAE
+ }
+
+ // Start of CallGraph SCC passes.
+ if (!DisableUnitAtATime)
+ MPM.add(createPruneEHPass()); // Remove dead EH info
+ if (Inliner) {
+ MPM.add(Inliner);
+ Inliner = 0;
+ }
+ if (!DisableUnitAtATime)
+ MPM.add(createFunctionAttrsPass()); // Set readonly/readnone attrs
+ if (OptLevel > 2)
+ MPM.add(createArgumentPromotionPass()); // Scalarize uninlined fn args
+
+ // Start of function pass.
+ // Break up aggregate allocas, using SSAUpdater.
+ MPM.add(createScalarReplAggregatesPass(-1, false));
+ MPM.add(createEarlyCSEPass()); // Catch trivial redundancies
+ if (!DisableSimplifyLibCalls)
+ MPM.add(createSimplifyLibCallsPass()); // Library Call Optimizations
+ MPM.add(createJumpThreadingPass()); // Thread jumps.
+ MPM.add(createCorrelatedValuePropagationPass()); // Propagate conditionals
+ MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
+ MPM.add(createInstructionCombiningPass()); // Combine silly seq's
+
+ MPM.add(createTailCallEliminationPass()); // Eliminate tail calls
+ MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
+ MPM.add(createReassociatePass()); // Reassociate expressions
+ MPM.add(createLoopRotatePass()); // Rotate Loop
+ MPM.add(createLICMPass()); // Hoist loop invariants
+ MPM.add(createLoopUnswitchPass(SizeLevel || OptLevel < 3));
+ MPM.add(createInstructionCombiningPass());
+ MPM.add(createIndVarSimplifyPass()); // Canonicalize indvars
+ MPM.add(createLoopIdiomPass()); // Recognize idioms like memset.
+ MPM.add(createLoopDeletionPass()); // Delete dead loops
+ if (!DisableUnrollLoops)
+ MPM.add(createLoopUnrollPass()); // Unroll small loops
+ addExtensionsToPM(EP_LoopOptimizerEnd, MPM);
+
+ if (OptLevel > 1)
+ MPM.add(createGVNPass()); // Remove redundancies
+ MPM.add(createMemCpyOptPass()); // Remove memcpy / form memset
+ MPM.add(createSCCPPass()); // Constant prop with SCCP
+
+ // Run instcombine after redundancy elimination to exploit opportunities
+ // opened up by them.
+ MPM.add(createInstructionCombiningPass());
+ MPM.add(createJumpThreadingPass()); // Thread jumps
+ MPM.add(createCorrelatedValuePropagationPass());
+ MPM.add(createDeadStoreEliminationPass()); // Delete dead stores
+
+ addExtensionsToPM(EP_ScalarOptimizerLate, MPM);
+
+ MPM.add(createAggressiveDCEPass()); // Delete dead instructions
+ MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
+ MPM.add(createInstructionCombiningPass()); // Clean up after everything.
+
+ if (!DisableUnitAtATime) {
+ // FIXME: We shouldn't bother with this anymore.
+ MPM.add(createStripDeadPrototypesPass()); // Get rid of dead prototypes
+
+ // GlobalOpt already deletes dead functions and globals, at -O3 try a
+ // late pass of GlobalDCE. It is capable of deleting dead cycles.
+ if (OptLevel > 2)
+ MPM.add(createGlobalDCEPass()); // Remove dead fns and globals.
+
+ if (OptLevel > 1)
+ MPM.add(createConstantMergePass()); // Merge dup global constants
+ }
+}
+
+void PassManagerBuilder::populateLTOPassManager(PassManagerBase &PM,
+ bool Internalize,
+ bool RunInliner) {
+ // Provide AliasAnalysis services for optimizations.
+ addInitialAliasAnalysisPasses(PM);
+
+ // Now that composite has been compiled, scan through the module, looking
+ // for a main function. If main is defined, mark all other functions
+ // internal.
+ if (Internalize)
+ PM.add(createInternalizePass(true));
+
+ // Propagate constants at call sites into the functions they call. This
+ // opens opportunities for globalopt (and inlining) by substituting function
+ // pointers passed as arguments to direct uses of functions.
+ PM.add(createIPSCCPPass());
+
+ // Now that we internalized some globals, see if we can hack on them!
+ PM.add(createGlobalOptimizerPass());
+
+ // Linking modules together can lead to duplicated global constants, only
+ // keep one copy of each constant.
+ PM.add(createConstantMergePass());
+
+ // Remove unused arguments from functions.
+ PM.add(createDeadArgEliminationPass());
+
+ // Reduce the code after globalopt and ipsccp. Both can open up significant
+ // simplification opportunities, and both can propagate functions through
+ // function pointers. When this happens, we often have to resolve varargs
+ // calls, etc, so let instcombine do this.
+ PM.add(createInstructionCombiningPass());
+
+ // Inline small functions
+ if (RunInliner)
+ PM.add(createFunctionInliningPass());
+
+ PM.add(createPruneEHPass()); // Remove dead EH info.
+
+ // Optimize globals again if we ran the inliner.
+ if (RunInliner)
+ PM.add(createGlobalOptimizerPass());
+ PM.add(createGlobalDCEPass()); // Remove dead functions.
+
+ // If we didn't decide to inline a function, check to see if we can
+ // transform it to pass arguments by value instead of by reference.
+ PM.add(createArgumentPromotionPass());
+
+ // The IPO passes may leave cruft around. Clean up after them.
+ PM.add(createInstructionCombiningPass());
+ PM.add(createJumpThreadingPass());
+ // Break up allocas
+ PM.add(createScalarReplAggregatesPass());
+
+ // Run a few AA driven optimizations here and now, to cleanup the code.
+ PM.add(createFunctionAttrsPass()); // Add nocapture.
+ PM.add(createGlobalsModRefPass()); // IP alias analysis.
+
+ PM.add(createLICMPass()); // Hoist loop invariants.
+ PM.add(createGVNPass()); // Remove redundancies.
+ PM.add(createMemCpyOptPass()); // Remove dead memcpys.
+ // Nuke dead stores.
+ PM.add(createDeadStoreEliminationPass());
+
+ // Cleanup and simplify the code after the scalar optimizations.
+ PM.add(createInstructionCombiningPass());
+
+ PM.add(createJumpThreadingPass());
+
+ // Delete basic blocks, which optimization passes may have killed.
+ PM.add(createCFGSimplificationPass());
+
+ // Now that we have optimized the program, discard unreachable functions.
+ PM.add(createGlobalDCEPass());
+}