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llvm/lib/Passes/PassBuilder.cpp
Chandler Carruth 377af8df2b [PM] Introduce basic update capabilities to the new PM's CGSCC pass 
manager, including both plumbing and logic to handle function pass
updates.

There are three fundamentally tied changes here:
1) Plumbing *some* mechanism for updating the CGSCC pass manager as the
   CG changes while passes are running.
2) Changing the CGSCC pass manager infrastructure to have support for
   the underlying graph to mutate mid-pass run.
3) Actually updating the CG after function passes run.

I can separate them if necessary, but I think its really useful to have
them together as the needs of #3 drove #2, and that in turn drove #1.

The plumbing technique is to extend the "run" method signature with
extra arguments. We provide the call graph that intrinsically is
available as it is the basis of the pass manager's IR units, and an
output parameter that records the results of updating the call graph
during an SCC passes's run. Note that "...UpdateResult" isn't a *great*
name here... suggestions very welcome.

I tried a pretty frustrating number of different data structures and such
for the innards of the update result. Every other one failed for one
reason or another. Sometimes I just couldn't keep the layers of
complexity right in my head. The thing that really worked was to just
directly provide access to the underlying structures used to walk the
call graph so that their updates could be informed by the *particular*
nature of the change to the graph.

The technique for how to make the pass management infrastructure cope
with mutating graphs was also something that took a really, really large
number of iterations to get to a place where I was happy. Here are some
of the considerations that drove the design:

- We operate at three levels within the infrastructure: RefSCC, SCC, and
  Node. In each case, we are working bottom up and so we want to
  continue to iterate on the "lowest" node as the graph changes. Look at
  how we iterate over nodes in an SCC running function passes as those
  function passes mutate the CG. We continue to iterate on the "lowest"
  SCC, which is the one that continues to contain the function just
  processed.

- The call graph structure re-uses SCCs (and RefSCCs) during mutation
  events for the *highest* entry in the resulting new subgraph, not the
  lowest. This means that it is necessary to continually update the
  current SCC or RefSCC as it shifts. This is really surprising and
  subtle, and took a long time for me to work out. I actually tried
  changing the call graph to provide the opposite behavior, and it
  breaks *EVERYTHING*. The graph update algorithms are really deeply
  tied to this particualr pattern.

- When SCCs or RefSCCs are split apart and refined and we continually
  re-pin our processing to the bottom one in the subgraph, we need to
  enqueue the newly formed SCCs and RefSCCs for subsequent processing.
  Queuing them presents a few challenges:
  1) SCCs and RefSCCs use wildly different iteration strategies at
     a high level. We end up needing to converge them on worklist
     approaches that can be extended in order to be able to handle the
     mutations.
  2) The order of the enqueuing need to remain bottom-up post-order so
     that we don't get surprising order of visitation for things like
     the inliner.
  3) We need the worklists to have set semantics so we don't duplicate
     things endlessly. We don't need a *persistent* set though because
     we always keep processing the bottom node!!!! This is super, super
     surprising to me and took a long time to convince myself this is
     correct, but I'm pretty sure it is... Once we sink down to the
     bottom node, we can't re-split out the same node in any way, and
     the postorder of the current queue is fixed and unchanging.
  4) We need to make sure that the "current" SCC or RefSCC actually gets
     enqueued here such that we re-visit it because we continue
     processing a *new*, *bottom* SCC/RefSCC.

- We also need the ability to *skip* SCCs and RefSCCs that get merged
  into a larger component. We even need the ability to skip *nodes* from
  an SCC that are no longer part of that SCC.

This led to the design you see in the patch which uses SetVector-based
worklists. The RefSCC worklist is always empty until an update occurs
and is just used to handle those RefSCCs created by updates as the
others don't even exist yet and are formed on-demand during the
bottom-up walk. The SCC worklist is pre-populated from the RefSCC, and
we push new SCCs onto it and blacklist existing SCCs on it to get the
desired processing.

We then *directly* update these when updating the call graph as I was
never able to find a satisfactory abstraction around the update
strategy.

Finally, we need to compute the updates for function passes. This is
mostly used as an initial customer of all the update mechanisms to drive
their design to at least cover some real set of use cases. There are
a bunch of interesting things that came out of doing this:

- It is really nice to do this a function at a time because that
  function is likely hot in the cache. This means we want even the
  function pass adaptor to support online updates to the call graph!

- To update the call graph after arbitrary function pass mutations is
  quite hard. We have to build a fairly comprehensive set of
  data structures and then process them. Fortunately, some of this code
  is related to the code for building the cal graph in the first place.
  Unfortunately, very little of it makes any sense to share because the
  nature of what we're doing is so very different. I've factored out the
  one part that made sense at least.

- We need to transfer these updates into the various structures for the
  CGSCC pass manager. Once those were more sanely worked out, this
  became relatively easier. But some of those needs necessitated changes
  to the LazyCallGraph interface to make it significantly easier to
  extract the changed SCCs from an update operation.

- We also need to update the CGSCC analysis manager as the shape of the
  graph changes. When an SCC is merged away we need to clear analyses
  associated with it from the analysis manager which we didn't have
  support for in the analysis manager infrsatructure. New SCCs are easy!
  But then we have the case that the original SCC has its shape changed
  but remains in the call graph. There we need to *invalidate* the
  analyses associated with it.

- We also need to invalidate analyses after we *finish* processing an
  SCC. But the analyses we need to invalidate here are *only those for
  the newly updated SCC*!!! Because we only continue processing the
  bottom SCC, if we split SCCs apart the original one gets invalidated
  once when its shape changes and is not processed farther so its
  analyses will be correct. It is the bottom SCC which continues being
  processed and needs to have the "normal" invalidation done based on
  the preserved analyses set.

All of this is mostly background and context for the changes here.

Many thanks to all the reviewers who helped here. Especially Sanjoy who
caught several interesting bugs in the graph algorithms, David, Sean,
and others who all helped with feedback.

Differential Revision: http://reviews.llvm.org/D21464

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279618 91177308-0d34-0410-b5e6-96231b3b80d8
2016-08-24 09:37:14 +00:00

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//===- Parsing, selection, and construction of pass pipelines -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
///
/// This file provides the implementation of the PassBuilder based on our
/// static pass registry as well as related functionality. It also provides
/// helpers to aid in analyzing, debugging, and testing passes and pass
/// pipelines.
///
//===----------------------------------------------------------------------===//
#include "llvm/Passes/PassBuilder.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/AliasAnalysisEvaluator.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/BasicAliasAnalysis.h"
#include "llvm/Analysis/BlockFrequencyInfo.h"
#include "llvm/Analysis/BlockFrequencyInfoImpl.h"
#include "llvm/Analysis/BranchProbabilityInfo.h"
#include "llvm/Analysis/CFLAndersAliasAnalysis.h"
#include "llvm/Analysis/CFLSteensAliasAnalysis.h"
#include "llvm/Analysis/CGSCCPassManager.h"
#include "llvm/Analysis/CallGraph.h"
#include "llvm/Analysis/DemandedBits.h"
#include "llvm/Analysis/DependenceAnalysis.h"
#include "llvm/Analysis/DominanceFrontier.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/IVUsers.h"
#include "llvm/Analysis/LazyCallGraph.h"
#include "llvm/Analysis/LazyValueInfo.h"
#include "llvm/Analysis/LoopAccessAnalysis.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/MemoryDependenceAnalysis.h"
#include "llvm/Analysis/ModuleSummaryAnalysis.h"
#include "llvm/Analysis/OptimizationDiagnosticInfo.h"
#include "llvm/Analysis/PostDominators.h"
#include "llvm/Analysis/ProfileSummaryInfo.h"
#include "llvm/Analysis/RegionInfo.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Analysis/ScalarEvolutionAliasAnalysis.h"
#include "llvm/Analysis/ScopedNoAliasAA.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Analysis/TypeBasedAliasAnalysis.h"
#include "llvm/CodeGen/PreISelIntrinsicLowering.h"
#include "llvm/CodeGen/UnreachableBlockElim.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/IRPrintingPasses.h"
#include "llvm/IR/PassManager.h"
#include "llvm/IR/Verifier.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Regex.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/GCOVProfiler.h"
#include "llvm/Transforms/IPO/AlwaysInliner.h"
#include "llvm/Transforms/IPO/ConstantMerge.h"
#include "llvm/Transforms/IPO/CrossDSOCFI.h"
#include "llvm/Transforms/IPO/DeadArgumentElimination.h"
#include "llvm/Transforms/IPO/ElimAvailExtern.h"
#include "llvm/Transforms/IPO/ForceFunctionAttrs.h"
#include "llvm/Transforms/IPO/FunctionAttrs.h"
#include "llvm/Transforms/IPO/FunctionImport.h"
#include "llvm/Transforms/IPO/GlobalDCE.h"
#include "llvm/Transforms/IPO/GlobalOpt.h"
#include "llvm/Transforms/IPO/InferFunctionAttrs.h"
#include "llvm/Transforms/IPO/Internalize.h"
#include "llvm/Transforms/IPO/LowerTypeTests.h"
#include "llvm/Transforms/IPO/PartialInlining.h"
#include "llvm/Transforms/IPO/SCCP.h"
#include "llvm/Transforms/IPO/StripDeadPrototypes.h"
#include "llvm/Transforms/IPO/WholeProgramDevirt.h"
#include "llvm/Transforms/InstCombine/InstCombine.h"
#include "llvm/Transforms/InstrProfiling.h"
#include "llvm/Transforms/PGOInstrumentation.h"
#include "llvm/Transforms/SampleProfile.h"
#include "llvm/Transforms/Scalar/ADCE.h"
#include "llvm/Transforms/Scalar/AlignmentFromAssumptions.h"
#include "llvm/Transforms/Scalar/BDCE.h"
#include "llvm/Transforms/Scalar/ConstantHoisting.h"
#include "llvm/Transforms/Scalar/CorrelatedValuePropagation.h"
#include "llvm/Transforms/Scalar/DCE.h"
#include "llvm/Transforms/Scalar/DeadStoreElimination.h"
#include "llvm/Transforms/Scalar/EarlyCSE.h"
#include "llvm/Transforms/Scalar/Float2Int.h"
#include "llvm/Transforms/Scalar/GVN.h"
#include "llvm/Transforms/Scalar/GuardWidening.h"
#include "llvm/Transforms/Scalar/IndVarSimplify.h"
#include "llvm/Transforms/Scalar/JumpThreading.h"
#include "llvm/Transforms/Scalar/LICM.h"
#include "llvm/Transforms/Scalar/LoopDataPrefetch.h"
#include "llvm/Transforms/Scalar/LoopDeletion.h"
#include "llvm/Transforms/Scalar/LoopDistribute.h"
#include "llvm/Transforms/Scalar/LoopIdiomRecognize.h"
#include "llvm/Transforms/Scalar/LoopInstSimplify.h"
#include "llvm/Transforms/Scalar/LoopRotation.h"
#include "llvm/Transforms/Scalar/LoopSimplifyCFG.h"
#include "llvm/Transforms/Scalar/LoopStrengthReduce.h"
#include "llvm/Transforms/Scalar/LoopUnrollPass.h"
#include "llvm/Transforms/Scalar/LowerAtomic.h"
#include "llvm/Transforms/Scalar/LowerExpectIntrinsic.h"
#include "llvm/Transforms/Scalar/LowerGuardIntrinsic.h"
#include "llvm/Transforms/Scalar/MemCpyOptimizer.h"
#include "llvm/Transforms/Scalar/MergedLoadStoreMotion.h"
#include "llvm/Transforms/Scalar/NaryReassociate.h"
#include "llvm/Transforms/Scalar/PartiallyInlineLibCalls.h"
#include "llvm/Transforms/Scalar/Reassociate.h"
#include "llvm/Transforms/Scalar/SCCP.h"
#include "llvm/Transforms/Scalar/SROA.h"
#include "llvm/Transforms/Scalar/SimplifyCFG.h"
#include "llvm/Transforms/Scalar/Sink.h"
#include "llvm/Transforms/Scalar/SpeculativeExecution.h"
#include "llvm/Transforms/Scalar/TailRecursionElimination.h"
#include "llvm/Transforms/Utils/AddDiscriminators.h"
#include "llvm/Transforms/Utils/BreakCriticalEdges.h"
#include "llvm/Transforms/Utils/LCSSA.h"
#include "llvm/Transforms/Utils/LoopSimplify.h"
#include "llvm/Transforms/Utils/LowerInvoke.h"
#include "llvm/Transforms/Utils/Mem2Reg.h"
#include "llvm/Transforms/Utils/MemorySSA.h"
#include "llvm/Transforms/Utils/NameAnonFunctions.h"
#include "llvm/Transforms/Utils/SimplifyInstructions.h"
#include "llvm/Transforms/Utils/SymbolRewriter.h"
#include "llvm/Transforms/Vectorize/LoopVectorize.h"
#include "llvm/Transforms/Vectorize/SLPVectorizer.h"
#include <type_traits>
using namespace llvm;
static Regex DefaultAliasRegex("^(default|lto-pre-link|lto)<(O[0123sz])>$");
namespace {
/// \brief No-op module pass which does nothing.
struct NoOpModulePass {
PreservedAnalyses run(Module &M, ModuleAnalysisManager &) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpModulePass"; }
};
/// \brief No-op module analysis.
class NoOpModuleAnalysis : public AnalysisInfoMixin<NoOpModuleAnalysis> {
friend AnalysisInfoMixin<NoOpModuleAnalysis>;
static char PassID;
public:
struct Result {};
Result run(Module &, ModuleAnalysisManager &) { return Result(); }
static StringRef name() { return "NoOpModuleAnalysis"; }
};
/// \brief No-op CGSCC pass which does nothing.
struct NoOpCGSCCPass {
PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &,
LazyCallGraph &, CGSCCUpdateResult &UR) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpCGSCCPass"; }
};
/// \brief No-op CGSCC analysis.
class NoOpCGSCCAnalysis : public AnalysisInfoMixin<NoOpCGSCCAnalysis> {
friend AnalysisInfoMixin<NoOpCGSCCAnalysis>;
static char PassID;
public:
struct Result {};
Result run(LazyCallGraph::SCC &, CGSCCAnalysisManager &, LazyCallGraph &G) {
return Result();
}
static StringRef name() { return "NoOpCGSCCAnalysis"; }
};
/// \brief No-op function pass which does nothing.
struct NoOpFunctionPass {
PreservedAnalyses run(Function &F, FunctionAnalysisManager &) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpFunctionPass"; }
};
/// \brief No-op function analysis.
class NoOpFunctionAnalysis : public AnalysisInfoMixin<NoOpFunctionAnalysis> {
friend AnalysisInfoMixin<NoOpFunctionAnalysis>;
static char PassID;
public:
struct Result {};
Result run(Function &, FunctionAnalysisManager &) { return Result(); }
static StringRef name() { return "NoOpFunctionAnalysis"; }
};
/// \brief No-op loop pass which does nothing.
struct NoOpLoopPass {
PreservedAnalyses run(Loop &L, LoopAnalysisManager &) {
return PreservedAnalyses::all();
}
static StringRef name() { return "NoOpLoopPass"; }
};
/// \brief No-op loop analysis.
class NoOpLoopAnalysis : public AnalysisInfoMixin<NoOpLoopAnalysis> {
friend AnalysisInfoMixin<NoOpLoopAnalysis>;
static char PassID;
public:
struct Result {};
Result run(Loop &, LoopAnalysisManager &) { return Result(); }
static StringRef name() { return "NoOpLoopAnalysis"; }
};
char NoOpModuleAnalysis::PassID;
char NoOpCGSCCAnalysis::PassID;
char NoOpFunctionAnalysis::PassID;
char NoOpLoopAnalysis::PassID;
} // End anonymous namespace.
void PassBuilder::registerModuleAnalyses(ModuleAnalysisManager &MAM) {
#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
MAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
}
void PassBuilder::registerCGSCCAnalyses(CGSCCAnalysisManager &CGAM) {
#define CGSCC_ANALYSIS(NAME, CREATE_PASS) \
CGAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
}
void PassBuilder::registerFunctionAnalyses(FunctionAnalysisManager &FAM) {
#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
FAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
}
void PassBuilder::registerLoopAnalyses(LoopAnalysisManager &LAM) {
#define LOOP_ANALYSIS(NAME, CREATE_PASS) \
LAM.registerPass([&] { return CREATE_PASS; });
#include "PassRegistry.def"
}
void PassBuilder::addPerModuleDefaultPipeline(ModulePassManager &MPM,
OptimizationLevel Level,
bool DebugLogging) {
// FIXME: Finish fleshing this out to match the legacy pipelines.
FunctionPassManager EarlyFPM(DebugLogging);
EarlyFPM.addPass(SimplifyCFGPass());
EarlyFPM.addPass(SROA());
EarlyFPM.addPass(EarlyCSEPass());
EarlyFPM.addPass(LowerExpectIntrinsicPass());
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(EarlyFPM)));
}
void PassBuilder::addLTOPreLinkDefaultPipeline(ModulePassManager &MPM,
OptimizationLevel Level,
bool DebugLogging) {
// FIXME: We should use a customized pre-link pipeline!
addPerModuleDefaultPipeline(MPM, Level, DebugLogging);
}
void PassBuilder::addLTODefaultPipeline(ModulePassManager &MPM,
OptimizationLevel Level,
bool DebugLogging) {
// FIXME: Finish fleshing this out to match the legacy LTO pipelines.
FunctionPassManager LateFPM(DebugLogging);
LateFPM.addPass(InstCombinePass());
LateFPM.addPass(SimplifyCFGPass());
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(LateFPM)));
}
static Optional<int> parseRepeatPassName(StringRef Name) {
if (!Name.consume_front("repeat<") || !Name.consume_back(">"))
return None;
int Count;
if (Name.getAsInteger(0, Count) || Count <= 0)
return None;
return Count;
}
static bool isModulePassName(StringRef Name) {
// Manually handle aliases for pre-configured pipeline fragments.
if (Name.startswith("default") || Name.startswith("lto"))
return DefaultAliasRegex.match(Name);
// Explicitly handle pass manager names.
if (Name == "module")
return true;
if (Name == "cgscc")
return true;
if (Name == "function")
return true;
// Explicitly handle custom-parsed pass names.
if (parseRepeatPassName(Name))
return true;
#define MODULE_PASS(NAME, CREATE_PASS) \
if (Name == NAME) \
return true;
#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">") \
return true;
#include "PassRegistry.def"
return false;
}
static bool isCGSCCPassName(StringRef Name) {
// Explicitly handle pass manager names.
if (Name == "cgscc")
return true;
if (Name == "function")
return true;
// Explicitly handle custom-parsed pass names.
if (parseRepeatPassName(Name))
return true;
#define CGSCC_PASS(NAME, CREATE_PASS) \
if (Name == NAME) \
return true;
#define CGSCC_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">") \
return true;
#include "PassRegistry.def"
return false;
}
static bool isFunctionPassName(StringRef Name) {
// Explicitly handle pass manager names.
if (Name == "function")
return true;
if (Name == "loop")
return true;
// Explicitly handle custom-parsed pass names.
if (parseRepeatPassName(Name))
return true;
#define FUNCTION_PASS(NAME, CREATE_PASS) \
if (Name == NAME) \
return true;
#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">") \
return true;
#include "PassRegistry.def"
return false;
}
static bool isLoopPassName(StringRef Name) {
// Explicitly handle pass manager names.
if (Name == "loop")
return true;
// Explicitly handle custom-parsed pass names.
if (parseRepeatPassName(Name))
return true;
#define LOOP_PASS(NAME, CREATE_PASS) \
if (Name == NAME) \
return true;
#define LOOP_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">") \
return true;
#include "PassRegistry.def"
return false;
}
Optional<std::vector<PassBuilder::PipelineElement>>
PassBuilder::parsePipelineText(StringRef Text) {
std::vector<PipelineElement> ResultPipeline;
SmallVector<std::vector<PipelineElement> *, 4> PipelineStack = {
&ResultPipeline};
for (;;) {
std::vector<PipelineElement> &Pipeline = *PipelineStack.back();
size_t Pos = Text.find_first_of(",()");
Pipeline.push_back({Text.substr(0, Pos), {}});
// If we have a single terminating name, we're done.
if (Pos == Text.npos)
break;
char Sep = Text[Pos];
Text = Text.substr(Pos + 1);
if (Sep == ',')
// Just a name ending in a comma, continue.
continue;
if (Sep == '(') {
// Push the inner pipeline onto the stack to continue processing.
PipelineStack.push_back(&Pipeline.back().InnerPipeline);
continue;
}
assert(Sep == ')' && "Bogus separator!");
// When handling the close parenthesis, we greedily consume them to avoid
// empty strings in the pipeline.
do {
// If we try to pop the outer pipeline we have unbalanced parentheses.
if (PipelineStack.size() == 1)
return None;
PipelineStack.pop_back();
} while (Text.consume_front(")"));
// Check if we've finished parsing.
if (Text.empty())
break;
// Otherwise, the end of an inner pipeline always has to be followed by
// a comma, and then we can continue.
if (!Text.consume_front(","))
return None;
}
if (PipelineStack.size() > 1)
// Unbalanced paretheses.
return None;
assert(PipelineStack.back() == &ResultPipeline &&
"Wrong pipeline at the bottom of the stack!");
return {std::move(ResultPipeline)};
}
bool PassBuilder::parseModulePass(ModulePassManager &MPM,
const PipelineElement &E, bool VerifyEachPass,
bool DebugLogging) {
auto &Name = E.Name;
auto &InnerPipeline = E.InnerPipeline;
// First handle complex passes like the pass managers which carry pipelines.
if (!InnerPipeline.empty()) {
if (Name == "module") {
ModulePassManager NestedMPM(DebugLogging);
if (!parseModulePassPipeline(NestedMPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
MPM.addPass(std::move(NestedMPM));
return true;
}
if (Name == "cgscc") {
CGSCCPassManager CGPM(DebugLogging);
if (!parseCGSCCPassPipeline(CGPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM),
DebugLogging));
return true;
}
if (Name == "function") {
FunctionPassManager FPM(DebugLogging);
if (!parseFunctionPassPipeline(FPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
return true;
}
if (auto Count = parseRepeatPassName(Name)) {
ModulePassManager NestedMPM(DebugLogging);
if (!parseModulePassPipeline(NestedMPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
MPM.addPass(createRepeatedPass(*Count, std::move(NestedMPM)));
return true;
}
// Normal passes can't have pipelines.
return false;
}
// Manually handle aliases for pre-configured pipeline fragments.
if (Name.startswith("default") || Name.startswith("lto")) {
SmallVector<StringRef, 3> Matches;
if (!DefaultAliasRegex.match(Name, &Matches))
return false;
assert(Matches.size() == 3 && "Must capture two matched strings!");
OptimizationLevel L = StringSwitch<OptimizationLevel>(Matches[2])
.Case("O0", O0)
.Case("O1", O1)
.Case("O2", O2)
.Case("O3", O3)
.Case("Os", Os)
.Case("Oz", Oz);
if (Matches[1] == "default") {
addPerModuleDefaultPipeline(MPM, L, DebugLogging);
} else if (Matches[1] == "lto-pre-link") {
addLTOPreLinkDefaultPipeline(MPM, L, DebugLogging);
} else {
assert(Matches[1] == "lto" && "Not one of the matched options!");
addLTODefaultPipeline(MPM, L, DebugLogging);
}
return true;
}
// Finally expand the basic registered passes from the .inc file.
#define MODULE_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
MPM.addPass(CREATE_PASS); \
return true; \
}
#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">") { \
MPM.addPass( \
RequireAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type, Module>()); \
return true; \
} \
if (Name == "invalidate<" NAME ">") { \
MPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return true; \
}
#include "PassRegistry.def"
return false;
}
bool PassBuilder::parseCGSCCPass(CGSCCPassManager &CGPM,
const PipelineElement &E, bool VerifyEachPass,
bool DebugLogging) {
auto &Name = E.Name;
auto &InnerPipeline = E.InnerPipeline;
// First handle complex passes like the pass managers which carry pipelines.
if (!InnerPipeline.empty()) {
if (Name == "cgscc") {
CGSCCPassManager NestedCGPM(DebugLogging);
if (!parseCGSCCPassPipeline(NestedCGPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
// Add the nested pass manager with the appropriate adaptor.
CGPM.addPass(std::move(NestedCGPM));
return true;
}
if (Name == "function") {
FunctionPassManager FPM(DebugLogging);
if (!parseFunctionPassPipeline(FPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
// Add the nested pass manager with the appropriate adaptor.
CGPM.addPass(
createCGSCCToFunctionPassAdaptor(std::move(FPM), DebugLogging));
return true;
}
if (auto Count = parseRepeatPassName(Name)) {
CGSCCPassManager NestedCGPM(DebugLogging);
if (!parseCGSCCPassPipeline(NestedCGPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
CGPM.addPass(createRepeatedPass(*Count, std::move(NestedCGPM)));
return true;
}
// Normal passes can't have pipelines.
return false;
}
// Now expand the basic registered passes from the .inc file.
#define CGSCC_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
CGPM.addPass(CREATE_PASS); \
return true; \
}
#define CGSCC_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">") { \
CGPM.addPass(RequireAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type, \
LazyCallGraph::SCC, CGSCCAnalysisManager, LazyCallGraph &, \
CGSCCUpdateResult &>()); \
return true; \
} \
if (Name == "invalidate<" NAME ">") { \
CGPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return true; \
}
#include "PassRegistry.def"
return false;
}
bool PassBuilder::parseFunctionPass(FunctionPassManager &FPM,
const PipelineElement &E,
bool VerifyEachPass, bool DebugLogging) {
auto &Name = E.Name;
auto &InnerPipeline = E.InnerPipeline;
// First handle complex passes like the pass managers which carry pipelines.
if (!InnerPipeline.empty()) {
if (Name == "function") {
FunctionPassManager NestedFPM(DebugLogging);
if (!parseFunctionPassPipeline(NestedFPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
// Add the nested pass manager with the appropriate adaptor.
FPM.addPass(std::move(NestedFPM));
return true;
}
if (Name == "loop") {
LoopPassManager LPM(DebugLogging);
if (!parseLoopPassPipeline(LPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
// Add the nested pass manager with the appropriate adaptor.
FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM)));
return true;
}
if (auto Count = parseRepeatPassName(Name)) {
FunctionPassManager NestedFPM(DebugLogging);
if (!parseFunctionPassPipeline(NestedFPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
FPM.addPass(createRepeatedPass(*Count, std::move(NestedFPM)));
return true;
}
// Normal passes can't have pipelines.
return false;
}
// Now expand the basic registered passes from the .inc file.
#define FUNCTION_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
FPM.addPass(CREATE_PASS); \
return true; \
}
#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">") { \
FPM.addPass( \
RequireAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type, Function>()); \
return true; \
} \
if (Name == "invalidate<" NAME ">") { \
FPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return true; \
}
#include "PassRegistry.def"
return false;
}
bool PassBuilder::parseLoopPass(LoopPassManager &LPM, const PipelineElement &E,
bool VerifyEachPass, bool DebugLogging) {
StringRef Name = E.Name;
auto &InnerPipeline = E.InnerPipeline;
// First handle complex passes like the pass managers which carry pipelines.
if (!InnerPipeline.empty()) {
if (Name == "loop") {
LoopPassManager NestedLPM(DebugLogging);
if (!parseLoopPassPipeline(NestedLPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
// Add the nested pass manager with the appropriate adaptor.
LPM.addPass(std::move(NestedLPM));
return true;
}
if (auto Count = parseRepeatPassName(Name)) {
LoopPassManager NestedLPM(DebugLogging);
if (!parseLoopPassPipeline(NestedLPM, InnerPipeline, VerifyEachPass,
DebugLogging))
return false;
LPM.addPass(createRepeatedPass(*Count, std::move(NestedLPM)));
return true;
}
// Normal passes can't have pipelines.
return false;
}
// Now expand the basic registered passes from the .inc file.
#define LOOP_PASS(NAME, CREATE_PASS) \
if (Name == NAME) { \
LPM.addPass(CREATE_PASS); \
return true; \
}
#define LOOP_ANALYSIS(NAME, CREATE_PASS) \
if (Name == "require<" NAME ">") { \
LPM.addPass(RequireAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type, Loop>()); \
return true; \
} \
if (Name == "invalidate<" NAME ">") { \
LPM.addPass(InvalidateAnalysisPass< \
std::remove_reference<decltype(CREATE_PASS)>::type>()); \
return true; \
}
#include "PassRegistry.def"
return false;
}
bool PassBuilder::parseAAPassName(AAManager &AA, StringRef Name) {
#define MODULE_ALIAS_ANALYSIS(NAME, CREATE_PASS) \
if (Name == NAME) { \
AA.registerModuleAnalysis< \
std::remove_reference<decltype(CREATE_PASS)>::type>(); \
return true; \
}
#define FUNCTION_ALIAS_ANALYSIS(NAME, CREATE_PASS) \
if (Name == NAME) { \
AA.registerFunctionAnalysis< \
std::remove_reference<decltype(CREATE_PASS)>::type>(); \
return true; \
}
#include "PassRegistry.def"
return false;
}
bool PassBuilder::parseLoopPassPipeline(LoopPassManager &LPM,
ArrayRef<PipelineElement> Pipeline,
bool VerifyEachPass,
bool DebugLogging) {
for (const auto &Element : Pipeline) {
if (!parseLoopPass(LPM, Element, VerifyEachPass, DebugLogging))
return false;
// FIXME: No verifier support for Loop passes!
}
return true;
}
bool PassBuilder::parseFunctionPassPipeline(FunctionPassManager &FPM,
ArrayRef<PipelineElement> Pipeline,
bool VerifyEachPass,
bool DebugLogging) {
for (const auto &Element : Pipeline) {
if (!parseFunctionPass(FPM, Element, VerifyEachPass, DebugLogging))
return false;
if (VerifyEachPass)
FPM.addPass(VerifierPass());
}
return true;
}
bool PassBuilder::parseCGSCCPassPipeline(CGSCCPassManager &CGPM,
ArrayRef<PipelineElement> Pipeline,
bool VerifyEachPass,
bool DebugLogging) {
for (const auto &Element : Pipeline) {
if (!parseCGSCCPass(CGPM, Element, VerifyEachPass, DebugLogging))
return false;
// FIXME: No verifier support for CGSCC passes!
}
return true;
}
void PassBuilder::crossRegisterProxies(LoopAnalysisManager &LAM,
FunctionAnalysisManager &FAM,
CGSCCAnalysisManager &CGAM,
ModuleAnalysisManager &MAM) {
MAM.registerPass([&] { return FunctionAnalysisManagerModuleProxy(FAM); });
MAM.registerPass([&] { return CGSCCAnalysisManagerModuleProxy(CGAM); });
CGAM.registerPass([&] { return FunctionAnalysisManagerCGSCCProxy(FAM); });
CGAM.registerPass([&] { return ModuleAnalysisManagerCGSCCProxy(MAM); });
FAM.registerPass([&] { return CGSCCAnalysisManagerFunctionProxy(CGAM); });
FAM.registerPass([&] { return ModuleAnalysisManagerFunctionProxy(MAM); });
FAM.registerPass([&] { return LoopAnalysisManagerFunctionProxy(LAM); });
LAM.registerPass([&] { return FunctionAnalysisManagerLoopProxy(FAM); });
}
bool PassBuilder::parseModulePassPipeline(ModulePassManager &MPM,
ArrayRef<PipelineElement> Pipeline,
bool VerifyEachPass,
bool DebugLogging) {
for (const auto &Element : Pipeline) {
if (!parseModulePass(MPM, Element, VerifyEachPass, DebugLogging))
return false;
if (VerifyEachPass)
MPM.addPass(VerifierPass());
}
return true;
}
// Primary pass pipeline description parsing routine.
// FIXME: Should this routine accept a TargetMachine or require the caller to
// pre-populate the analysis managers with target-specific stuff?
bool PassBuilder::parsePassPipeline(ModulePassManager &MPM,
StringRef PipelineText, bool VerifyEachPass,
bool DebugLogging) {
auto Pipeline = parsePipelineText(PipelineText);
if (!Pipeline || Pipeline->empty())
return false;
// If the first name isn't at the module layer, wrap the pipeline up
// automatically.
StringRef FirstName = Pipeline->front().Name;
if (!isModulePassName(FirstName)) {
if (isCGSCCPassName(FirstName))
Pipeline = {{"cgscc", std::move(*Pipeline)}};
else if (isFunctionPassName(FirstName))
Pipeline = {{"function", std::move(*Pipeline)}};
else if (isLoopPassName(FirstName))
Pipeline = {{"function", {{"loop", std::move(*Pipeline)}}}};
else
// Unknown pass name!
return false;
}
return parseModulePassPipeline(MPM, *Pipeline, VerifyEachPass, DebugLogging);
}
bool PassBuilder::parseAAPipeline(AAManager &AA, StringRef PipelineText) {
while (!PipelineText.empty()) {
StringRef Name;
std::tie(Name, PipelineText) = PipelineText.split(',');
if (!parseAAPassName(AA, Name))
return false;
}
return true;
}
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