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llvm-6502/include/llvm/InitializePasses.h
Chandler Carruth aeef83c6af Switch TargetTransformInfo from an immutable analysis pass that requires 
a TargetMachine to construct (and thus isn't always available), to an
analysis group that supports layered implementations much like
AliasAnalysis does. This is a pretty massive change, with a few parts
that I was unable to easily separate (sorry), so I'll walk through it.

The first step of this conversion was to make TargetTransformInfo an
analysis group, and to sink the nonce implementations in
ScalarTargetTransformInfo and VectorTargetTranformInfo into
a NoTargetTransformInfo pass. This allows other passes to add a hard
requirement on TTI, and assume they will always get at least on
implementation.

The TargetTransformInfo analysis group leverages the delegation chaining
trick that AliasAnalysis uses, where the base class for the analysis
group delegates to the previous analysis *pass*, allowing all but tho
NoFoo analysis passes to only implement the parts of the interfaces they
support. It also introduces a new trick where each pass in the group
retains a pointer to the top-most pass that has been initialized. This
allows passes to implement one API in terms of another API and benefit
when some other pass above them in the stack has more precise results
for the second API.

The second step of this conversion is to create a pass that implements
the TargetTransformInfo analysis using the target-independent
abstractions in the code generator. This replaces the
ScalarTargetTransformImpl and VectorTargetTransformImpl classes in
lib/Target with a single pass in lib/CodeGen called
BasicTargetTransformInfo. This class actually provides most of the TTI
functionality, basing it upon the TargetLowering abstraction and other
information in the target independent code generator.

The third step of the conversion adds support to all TargetMachines to
register custom analysis passes. This allows building those passes with
access to TargetLowering or other target-specific classes, and it also
allows each target to customize the set of analysis passes desired in
the pass manager. The baseline LLVMTargetMachine implements this
interface to add the BasicTTI pass to the pass manager, and all of the
tools that want to support target-aware TTI passes call this routine on
whatever target machine they end up with to add the appropriate passes.

The fourth step of the conversion created target-specific TTI analysis
passes for the X86 and ARM backends. These passes contain the custom
logic that was previously in their extensions of the
ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces.
I separated them into their own file, as now all of the interface bits
are private and they just expose a function to create the pass itself.
Then I extended these target machines to set up a custom set of analysis
passes, first adding BasicTTI as a fallback, and then adding their
customized TTI implementations.

The fourth step required logic that was shared between the target
independent layer and the specific targets to move to a different
interface, as they no longer derive from each other. As a consequence,
a helper functions were added to TargetLowering representing the common
logic needed both in the target implementation and the codegen
implementation of the TTI pass. While technically this is the only
change that could have been committed separately, it would have been
a nightmare to extract.

The final step of the conversion was just to delete all the old
boilerplate. This got rid of the ScalarTargetTransformInfo and
VectorTargetTransformInfo classes, all of the support in all of the
targets for producing instances of them, and all of the support in the
tools for manually constructing a pass based around them.

Now that TTI is a relatively normal analysis group, two things become
straightforward. First, we can sink it into lib/Analysis which is a more
natural layer for it to live. Second, clients of this interface can
depend on it *always* being available which will simplify their code and
behavior. These (and other) simplifications will follow in subsequent
commits, this one is clearly big enough.

Finally, I'm very aware that much of the comments and documentation
needs to be updated. As soon as I had this working, and plausibly well
commented, I wanted to get it committed and in front of the build bots.
I'll be doing a few passes over documentation later if it sticks.

Commits to update DragonEgg and Clang will be made presently.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171681 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-07 01:37:14 +00:00

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//===- llvm/InitializePasses.h -------- Initialize All Passes ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the declarations for the pass initialization routines
// for the entire LLVM project.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_INITIALIZEPASSES_H
#define LLVM_INITIALIZEPASSES_H
namespace llvm {
class PassRegistry;
/// initializeCore - Initialize all passes linked into the
/// TransformUtils library.
void initializeCore(PassRegistry&);
/// initializeTransformUtils - Initialize all passes linked into the
/// TransformUtils library.
void initializeTransformUtils(PassRegistry&);
/// initializeScalarOpts - Initialize all passes linked into the
/// ScalarOpts library.
void initializeScalarOpts(PassRegistry&);
/// initializeVectorization - Initialize all passes linked into the
/// Vectorize library.
void initializeVectorization(PassRegistry&);
/// initializeInstCombine - Initialize all passes linked into the
/// ScalarOpts library.
void initializeInstCombine(PassRegistry&);
/// initializeIPO - Initialize all passes linked into the IPO library.
void initializeIPO(PassRegistry&);
/// initializeInstrumentation - Initialize all passes linked into the
/// Instrumentation library.
void initializeInstrumentation(PassRegistry&);
/// initializeAnalysis - Initialize all passes linked into the Analysis library.
void initializeAnalysis(PassRegistry&);
/// initializeIPA - Initialize all passes linked into the IPA library.
void initializeIPA(PassRegistry&);
/// initializeCodeGen - Initialize all passes linked into the CodeGen library.
void initializeCodeGen(PassRegistry&);
/// initializeCodeGen - Initialize all passes linked into the CodeGen library.
void initializeTarget(PassRegistry&);
void initializeAAEvalPass(PassRegistry&);
void initializeADCEPass(PassRegistry&);
void initializeAliasAnalysisAnalysisGroup(PassRegistry&);
void initializeAliasAnalysisCounterPass(PassRegistry&);
void initializeAliasDebuggerPass(PassRegistry&);
void initializeAliasSetPrinterPass(PassRegistry&);
void initializeAlwaysInlinerPass(PassRegistry&);
void initializeArgPromotionPass(PassRegistry&);
void initializeBarrierNoopPass(PassRegistry&);
void initializeBasicAliasAnalysisPass(PassRegistry&);
void initializeBasicCallGraphPass(PassRegistry&);
void initializeBasicTTIPass(PassRegistry&);
void initializeBlockExtractorPassPass(PassRegistry&);
void initializeBlockFrequencyInfoPass(PassRegistry&);
void initializeBlockPlacementPass(PassRegistry&);
void initializeBoundsCheckingPass(PassRegistry&);
void initializeBranchFolderPassPass(PassRegistry&);
void initializeBranchProbabilityInfoPass(PassRegistry&);
void initializeBreakCriticalEdgesPass(PassRegistry&);
void initializeCFGOnlyPrinterPass(PassRegistry&);
void initializeCFGOnlyViewerPass(PassRegistry&);
void initializeCFGPrinterPass(PassRegistry&);
void initializeCFGSimplifyPassPass(PassRegistry&);
void initializeCFGViewerPass(PassRegistry&);
void initializeCalculateSpillWeightsPass(PassRegistry&);
void initializeCallGraphAnalysisGroup(PassRegistry&);
void initializeCodeGenPreparePass(PassRegistry&);
void initializeCodePlacementOptPass(PassRegistry&);
void initializeConstantMergePass(PassRegistry&);
void initializeConstantPropagationPass(PassRegistry&);
void initializeMachineCopyPropagationPass(PassRegistry&);
void initializeCostModelAnalysisPass(PassRegistry&);
void initializeCorrelatedValuePropagationPass(PassRegistry&);
void initializeDAEPass(PassRegistry&);
void initializeDAHPass(PassRegistry&);
void initializeDCEPass(PassRegistry&);
void initializeDSEPass(PassRegistry&);
void initializeDeadInstEliminationPass(PassRegistry&);
void initializeDeadMachineInstructionElimPass(PassRegistry&);
void initializeDependenceAnalysisPass(PassRegistry&);
void initializeDomOnlyPrinterPass(PassRegistry&);
void initializeDomOnlyViewerPass(PassRegistry&);
void initializeDomPrinterPass(PassRegistry&);
void initializeDomViewerPass(PassRegistry&);
void initializeDominanceFrontierPass(PassRegistry&);
void initializeDominatorTreePass(PassRegistry&);
void initializeEarlyIfConverterPass(PassRegistry&);
void initializeEdgeBundlesPass(PassRegistry&);
void initializeEdgeProfilerPass(PassRegistry&);
void initializeExpandPostRAPass(PassRegistry&);
void initializePathProfilerPass(PassRegistry&);
void initializeGCOVProfilerPass(PassRegistry&);
void initializeAddressSanitizerPass(PassRegistry&);
void initializeAddressSanitizerModulePass(PassRegistry&);
void initializeMemorySanitizerPass(PassRegistry&);
void initializeThreadSanitizerPass(PassRegistry&);
void initializeEarlyCSEPass(PassRegistry&);
void initializeExpandISelPseudosPass(PassRegistry&);
void initializeFindUsedTypesPass(PassRegistry&);
void initializeFunctionAttrsPass(PassRegistry&);
void initializeGCInfoDeleterPass(PassRegistry&);
void initializeGCMachineCodeAnalysisPass(PassRegistry&);
void initializeGCModuleInfoPass(PassRegistry&);
void initializeGVNPass(PassRegistry&);
void initializeGlobalDCEPass(PassRegistry&);
void initializeGlobalOptPass(PassRegistry&);
void initializeGlobalsModRefPass(PassRegistry&);
void initializeIPCPPass(PassRegistry&);
void initializeIPSCCPPass(PassRegistry&);
void initializeIVUsersPass(PassRegistry&);
void initializeIfConverterPass(PassRegistry&);
void initializeIndVarSimplifyPass(PassRegistry&);
void initializeInstCombinerPass(PassRegistry&);
void initializeInstCountPass(PassRegistry&);
void initializeInstNamerPass(PassRegistry&);
void initializeInternalizePassPass(PassRegistry&);
void initializeIntervalPartitionPass(PassRegistry&);
void initializeJumpThreadingPass(PassRegistry&);
void initializeLCSSAPass(PassRegistry&);
void initializeLICMPass(PassRegistry&);
void initializeLazyValueInfoPass(PassRegistry&);
void initializeLibCallAliasAnalysisPass(PassRegistry&);
void initializeLintPass(PassRegistry&);
void initializeLiveDebugVariablesPass(PassRegistry&);
void initializeLiveIntervalsPass(PassRegistry&);
void initializeLiveRegMatrixPass(PassRegistry&);
void initializeLiveStacksPass(PassRegistry&);
void initializeLiveVariablesPass(PassRegistry&);
void initializeLoaderPassPass(PassRegistry&);
void initializeProfileMetadataLoaderPassPass(PassRegistry&);
void initializePathProfileLoaderPassPass(PassRegistry&);
void initializeLocalStackSlotPassPass(PassRegistry&);
void initializeLoopDeletionPass(PassRegistry&);
void initializeLoopExtractorPass(PassRegistry&);
void initializeLoopInfoPass(PassRegistry&);
void initializeLoopInstSimplifyPass(PassRegistry&);
void initializeLoopRotatePass(PassRegistry&);
void initializeLoopSimplifyPass(PassRegistry&);
void initializeLoopStrengthReducePass(PassRegistry&);
void initializeGlobalMergePass(PassRegistry&);
void initializeLoopUnrollPass(PassRegistry&);
void initializeLoopUnswitchPass(PassRegistry&);
void initializeLoopIdiomRecognizePass(PassRegistry&);
void initializeLowerAtomicPass(PassRegistry&);
void initializeLowerExpectIntrinsicPass(PassRegistry&);
void initializeLowerIntrinsicsPass(PassRegistry&);
void initializeLowerInvokePass(PassRegistry&);
void initializeLowerSwitchPass(PassRegistry&);
void initializeMachineBlockFrequencyInfoPass(PassRegistry&);
void initializeMachineBlockPlacementPass(PassRegistry&);
void initializeMachineBlockPlacementStatsPass(PassRegistry&);
void initializeMachineBranchProbabilityInfoPass(PassRegistry&);
void initializeMachineCSEPass(PassRegistry&);
void initializeMachineDominatorTreePass(PassRegistry&);
void initializeMachinePostDominatorTreePass(PassRegistry&);
void initializeMachineLICMPass(PassRegistry&);
void initializeMachineLoopInfoPass(PassRegistry&);
void initializeMachineModuleInfoPass(PassRegistry&);
void initializeMachineSchedulerPass(PassRegistry&);
void initializeMachineSinkingPass(PassRegistry&);
void initializeMachineTraceMetricsPass(PassRegistry&);
void initializeMachineVerifierPassPass(PassRegistry&);
void initializeMemCpyOptPass(PassRegistry&);
void initializeMemDepPrinterPass(PassRegistry&);
void initializeMemoryDependenceAnalysisPass(PassRegistry&);
void initializeMetaRenamerPass(PassRegistry&);
void initializeMergeFunctionsPass(PassRegistry&);
void initializeModuleDebugInfoPrinterPass(PassRegistry&);
void initializeNoAAPass(PassRegistry&);
void initializeNoProfileInfoPass(PassRegistry&);
void initializeNoPathProfileInfoPass(PassRegistry&);
void initializeObjCARCAliasAnalysisPass(PassRegistry&);
void initializeObjCARCAPElimPass(PassRegistry&);
void initializeObjCARCExpandPass(PassRegistry&);
void initializeObjCARCContractPass(PassRegistry&);
void initializeObjCARCOptPass(PassRegistry&);
void initializeOptimalEdgeProfilerPass(PassRegistry&);
void initializeOptimizePHIsPass(PassRegistry&);
void initializePEIPass(PassRegistry&);
void initializePHIEliminationPass(PassRegistry&);
void initializePartialInlinerPass(PassRegistry&);
void initializePeepholeOptimizerPass(PassRegistry&);
void initializePostDomOnlyPrinterPass(PassRegistry&);
void initializePostDomOnlyViewerPass(PassRegistry&);
void initializePostDomPrinterPass(PassRegistry&);
void initializePostDomViewerPass(PassRegistry&);
void initializePostDominatorTreePass(PassRegistry&);
void initializePostRASchedulerPass(PassRegistry&);
void initializePreVerifierPass(PassRegistry&);
void initializePrintDbgInfoPass(PassRegistry&);
void initializePrintFunctionPassPass(PassRegistry&);
void initializePrintModulePassPass(PassRegistry&);
void initializeProcessImplicitDefsPass(PassRegistry&);
void initializeProfileEstimatorPassPass(PassRegistry&);
void initializeProfileInfoAnalysisGroup(PassRegistry&);
void initializePathProfileInfoAnalysisGroup(PassRegistry&);
void initializePathProfileVerifierPass(PassRegistry&);
void initializeProfileVerifierPassPass(PassRegistry&);
void initializePromotePassPass(PassRegistry&);
void initializePruneEHPass(PassRegistry&);
void initializeReassociatePass(PassRegistry&);
void initializeRegToMemPass(PassRegistry&);
void initializeRegionInfoPass(PassRegistry&);
void initializeRegionOnlyPrinterPass(PassRegistry&);
void initializeRegionOnlyViewerPass(PassRegistry&);
void initializeRegionPrinterPass(PassRegistry&);
void initializeRegionViewerPass(PassRegistry&);
void initializeSCCPPass(PassRegistry&);
void initializeSROAPass(PassRegistry&);
void initializeSROA_DTPass(PassRegistry&);
void initializeSROA_SSAUpPass(PassRegistry&);
void initializeScalarEvolutionAliasAnalysisPass(PassRegistry&);
void initializeScalarEvolutionPass(PassRegistry&);
void initializeSimpleInlinerPass(PassRegistry&);
void initializeRegisterCoalescerPass(PassRegistry&);
void initializeSimplifyLibCallsPass(PassRegistry&);
void initializeSingleLoopExtractorPass(PassRegistry&);
void initializeSinkingPass(PassRegistry&);
void initializeSlotIndexesPass(PassRegistry&);
void initializeSpillPlacementPass(PassRegistry&);
void initializeStackProtectorPass(PassRegistry&);
void initializeStackColoringPass(PassRegistry&);
void initializeStackSlotColoringPass(PassRegistry&);
void initializeStripDeadDebugInfoPass(PassRegistry&);
void initializeStripDeadPrototypesPassPass(PassRegistry&);
void initializeStripDebugDeclarePass(PassRegistry&);
void initializeStripNonDebugSymbolsPass(PassRegistry&);
void initializeStripSymbolsPass(PassRegistry&);
void initializeStrongPHIEliminationPass(PassRegistry&);
void initializeTailCallElimPass(PassRegistry&);
void initializeTailDuplicatePassPass(PassRegistry&);
void initializeTargetPassConfigPass(PassRegistry&);
void initializeDataLayoutPass(PassRegistry&);
void initializeTargetTransformInfoAnalysisGroup(PassRegistry&);
void initializeNoTTIPass(PassRegistry&);
void initializeTargetLibraryInfoPass(PassRegistry&);
void initializeTwoAddressInstructionPassPass(PassRegistry&);
void initializeTypeBasedAliasAnalysisPass(PassRegistry&);
void initializeUnifyFunctionExitNodesPass(PassRegistry&);
void initializeUnreachableBlockElimPass(PassRegistry&);
void initializeUnreachableMachineBlockElimPass(PassRegistry&);
void initializeVerifierPass(PassRegistry&);
void initializeVirtRegMapPass(PassRegistry&);
void initializeVirtRegRewriterPass(PassRegistry&);
void initializeInstSimplifierPass(PassRegistry&);
void initializeUnpackMachineBundlesPass(PassRegistry&);
void initializeFinalizeMachineBundlesPass(PassRegistry&);
void initializeLoopVectorizePass(PassRegistry&);
void initializeBBVectorizePass(PassRegistry&);
void initializeMachineFunctionPrinterPassPass(PassRegistry&);
}
#endif
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