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https://github.com/c64scene-ar/llvm-6502.git
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bebe48dbfe
This adds a loop rerolling pass: the opposite of (partial) loop unrolling. The
transformation aims to take loops like this:
for (int i = 0; i < 3200; i += 5) {
a[i] += alpha * b[i];
a[i + 1] += alpha * b[i + 1];
a[i + 2] += alpha * b[i + 2];
a[i + 3] += alpha * b[i + 3];
a[i + 4] += alpha * b[i + 4];
}
and turn them into this:
for (int i = 0; i < 3200; ++i) {
a[i] += alpha * b[i];
}
and loops like this:
for (int i = 0; i < 500; ++i) {
x[3*i] = foo(0);
x[3*i+1] = foo(0);
x[3*i+2] = foo(0);
}
and turn them into this:
for (int i = 0; i < 1500; ++i) {
x[i] = foo(0);
}
There are two motivations for this transformation:
1. Code-size reduction (especially relevant, obviously, when compiling for
code size).
2. Providing greater choice to the loop vectorizer (and generic unroller) to
choose the unrolling factor (and a better ability to vectorize). The loop
vectorizer can take vector lengths and register pressure into account when
choosing an unrolling factor, for example, and a pre-unrolled loop limits that
choice. This is especially problematic if the manual unrolling was optimized
for a machine different from the current target.
The current implementation is limited to single basic-block loops only. The
rerolling recognition should work regardless of how the loop iterations are
intermixed within the loop body (subject to dependency and side-effect
constraints), but the significant restriction is that the order of the
instructions in each iteration must be identical. This seems sufficient to
capture all current use cases.
This pass is not currently enabled by default at any optimization level.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194939 91177308-0d34-0410-b5e6-96231b3b80d8
271 lines
12 KiB
C++
271 lines
12 KiB
C++
//===- llvm/InitializePasses.h -------- Initialize All Passes ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the declarations for the pass initialization routines
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// for the entire LLVM project.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_INITIALIZEPASSES_H
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#define LLVM_INITIALIZEPASSES_H
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namespace llvm {
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class PassRegistry;
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/// initializeCore - Initialize all passes linked into the
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/// TransformUtils library.
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void initializeCore(PassRegistry&);
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/// initializeTransformUtils - Initialize all passes linked into the
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/// TransformUtils library.
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void initializeTransformUtils(PassRegistry&);
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/// initializeScalarOpts - Initialize all passes linked into the
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/// ScalarOpts library.
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void initializeScalarOpts(PassRegistry&);
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/// initializeObjCARCOpts - Initialize all passes linked into the ObjCARCOpts
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/// library.
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void initializeObjCARCOpts(PassRegistry&);
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/// initializeVectorization - Initialize all passes linked into the
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/// Vectorize library.
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void initializeVectorization(PassRegistry&);
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/// initializeInstCombine - Initialize all passes linked into the
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/// ScalarOpts library.
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void initializeInstCombine(PassRegistry&);
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/// initializeIPO - Initialize all passes linked into the IPO library.
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void initializeIPO(PassRegistry&);
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/// initializeInstrumentation - Initialize all passes linked into the
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/// Instrumentation library.
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void initializeInstrumentation(PassRegistry&);
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/// initializeAnalysis - Initialize all passes linked into the Analysis library.
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void initializeAnalysis(PassRegistry&);
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/// initializeIPA - Initialize all passes linked into the IPA library.
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void initializeIPA(PassRegistry&);
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/// initializeCodeGen - Initialize all passes linked into the CodeGen library.
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void initializeCodeGen(PassRegistry&);
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/// initializeCodeGen - Initialize all passes linked into the CodeGen library.
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void initializeTarget(PassRegistry&);
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void initializeAAEvalPass(PassRegistry&);
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void initializeADCEPass(PassRegistry&);
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void initializeAliasAnalysisAnalysisGroup(PassRegistry&);
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void initializeAliasAnalysisCounterPass(PassRegistry&);
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void initializeAliasDebuggerPass(PassRegistry&);
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void initializeAliasSetPrinterPass(PassRegistry&);
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void initializeAlwaysInlinerPass(PassRegistry&);
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void initializeArgPromotionPass(PassRegistry&);
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void initializeSampleProfileLoaderPass(PassRegistry&);
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void initializeBarrierNoopPass(PassRegistry&);
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void initializeBasicAliasAnalysisPass(PassRegistry&);
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void initializeCallGraphPass(PassRegistry&);
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void initializeBasicTTIPass(PassRegistry&);
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void initializeBlockExtractorPassPass(PassRegistry&);
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void initializeBlockFrequencyInfoPass(PassRegistry&);
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void initializeBoundsCheckingPass(PassRegistry&);
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void initializeBranchFolderPassPass(PassRegistry&);
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void initializeBranchProbabilityInfoPass(PassRegistry&);
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void initializeBreakCriticalEdgesPass(PassRegistry&);
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void initializeCallGraphPrinterPass(PassRegistry&);
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void initializeCallGraphViewerPass(PassRegistry&);
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void initializeCFGOnlyPrinterPass(PassRegistry&);
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void initializeCFGOnlyViewerPass(PassRegistry&);
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void initializeCFGPrinterPass(PassRegistry&);
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void initializeCFGSimplifyPassPass(PassRegistry&);
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void initializeFlattenCFGPassPass(PassRegistry&);
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void initializeStructurizeCFGPass(PassRegistry&);
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void initializeCFGViewerPass(PassRegistry&);
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void initializeCodeGenPreparePass(PassRegistry&);
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void initializeConstantMergePass(PassRegistry&);
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void initializeConstantPropagationPass(PassRegistry&);
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void initializeMachineCopyPropagationPass(PassRegistry&);
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void initializeCostModelAnalysisPass(PassRegistry&);
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void initializeCorrelatedValuePropagationPass(PassRegistry&);
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void initializeDAEPass(PassRegistry&);
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void initializeDAHPass(PassRegistry&);
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void initializeDCEPass(PassRegistry&);
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void initializeDSEPass(PassRegistry&);
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void initializeDebugIRPass(PassRegistry&);
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void initializeDeadInstEliminationPass(PassRegistry&);
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void initializeDeadMachineInstructionElimPass(PassRegistry&);
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void initializeDelinearizationPass(PassRegistry &);
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void initializeDependenceAnalysisPass(PassRegistry&);
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void initializeDomOnlyPrinterPass(PassRegistry&);
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void initializeDomOnlyViewerPass(PassRegistry&);
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void initializeDomPrinterPass(PassRegistry&);
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void initializeDomViewerPass(PassRegistry&);
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void initializeDominanceFrontierPass(PassRegistry&);
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void initializeDominatorTreePass(PassRegistry&);
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void initializeEarlyIfConverterPass(PassRegistry&);
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void initializeEdgeBundlesPass(PassRegistry&);
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void initializeExpandPostRAPass(PassRegistry&);
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void initializeGCOVProfilerPass(PassRegistry&);
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void initializeAddressSanitizerPass(PassRegistry&);
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void initializeAddressSanitizerModulePass(PassRegistry&);
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void initializeMemorySanitizerPass(PassRegistry&);
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void initializeThreadSanitizerPass(PassRegistry&);
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void initializeDataFlowSanitizerPass(PassRegistry&);
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void initializeEarlyCSEPass(PassRegistry&);
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void initializeExpandISelPseudosPass(PassRegistry&);
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void initializeFindUsedTypesPass(PassRegistry&);
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void initializeFunctionAttrsPass(PassRegistry&);
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void initializeGCMachineCodeAnalysisPass(PassRegistry&);
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void initializeGCModuleInfoPass(PassRegistry&);
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void initializeGVNPass(PassRegistry&);
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void initializeGlobalDCEPass(PassRegistry&);
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void initializeGlobalOptPass(PassRegistry&);
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void initializeGlobalsModRefPass(PassRegistry&);
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void initializeIPCPPass(PassRegistry&);
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void initializeIPSCCPPass(PassRegistry&);
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void initializeIVUsersPass(PassRegistry&);
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void initializeIfConverterPass(PassRegistry&);
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void initializeIndVarSimplifyPass(PassRegistry&);
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void initializeInlineCostAnalysisPass(PassRegistry&);
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void initializeInstCombinerPass(PassRegistry&);
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void initializeInstCountPass(PassRegistry&);
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void initializeInstNamerPass(PassRegistry&);
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void initializeInternalizePassPass(PassRegistry&);
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void initializeIntervalPartitionPass(PassRegistry&);
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void initializeJumpThreadingPass(PassRegistry&);
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void initializeLCSSAPass(PassRegistry&);
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void initializeLICMPass(PassRegistry&);
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void initializeLazyValueInfoPass(PassRegistry&);
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void initializeLibCallAliasAnalysisPass(PassRegistry&);
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void initializeLintPass(PassRegistry&);
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void initializeLiveDebugVariablesPass(PassRegistry&);
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void initializeLiveIntervalsPass(PassRegistry&);
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void initializeLiveRegMatrixPass(PassRegistry&);
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void initializeLiveStacksPass(PassRegistry&);
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void initializeLiveVariablesPass(PassRegistry&);
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void initializeLoaderPassPass(PassRegistry&);
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void initializeLocalStackSlotPassPass(PassRegistry&);
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void initializeLoopDeletionPass(PassRegistry&);
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void initializeLoopExtractorPass(PassRegistry&);
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void initializeLoopInfoPass(PassRegistry&);
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void initializeLoopInstSimplifyPass(PassRegistry&);
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void initializeLoopRotatePass(PassRegistry&);
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void initializeLoopSimplifyPass(PassRegistry&);
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void initializeLoopStrengthReducePass(PassRegistry&);
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void initializeGlobalMergePass(PassRegistry&);
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void initializeLoopRerollPass(PassRegistry&);
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void initializeLoopUnrollPass(PassRegistry&);
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void initializeLoopUnswitchPass(PassRegistry&);
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void initializeLoopIdiomRecognizePass(PassRegistry&);
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void initializeLowerAtomicPass(PassRegistry&);
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void initializeLowerExpectIntrinsicPass(PassRegistry&);
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void initializeLowerIntrinsicsPass(PassRegistry&);
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void initializeLowerInvokePass(PassRegistry&);
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void initializeLowerSwitchPass(PassRegistry&);
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void initializeMachineBlockFrequencyInfoPass(PassRegistry&);
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void initializeMachineBlockPlacementPass(PassRegistry&);
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void initializeMachineBlockPlacementStatsPass(PassRegistry&);
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void initializeMachineBranchProbabilityInfoPass(PassRegistry&);
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void initializeMachineCSEPass(PassRegistry&);
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void initializeMachineDominatorTreePass(PassRegistry&);
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void initializeMachinePostDominatorTreePass(PassRegistry&);
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void initializeMachineLICMPass(PassRegistry&);
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void initializeMachineLoopInfoPass(PassRegistry&);
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void initializeMachineModuleInfoPass(PassRegistry&);
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void initializeMachineSchedulerPass(PassRegistry&);
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void initializeMachineSinkingPass(PassRegistry&);
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void initializeMachineTraceMetricsPass(PassRegistry&);
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void initializeMachineVerifierPassPass(PassRegistry&);
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void initializeMemCpyOptPass(PassRegistry&);
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void initializeMemDepPrinterPass(PassRegistry&);
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void initializeMemoryDependenceAnalysisPass(PassRegistry&);
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void initializeMetaRenamerPass(PassRegistry&);
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void initializeMergeFunctionsPass(PassRegistry&);
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void initializeModuleDebugInfoPrinterPass(PassRegistry&);
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void initializeNoAAPass(PassRegistry&);
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void initializeObjCARCAliasAnalysisPass(PassRegistry&);
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void initializeObjCARCAPElimPass(PassRegistry&);
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void initializeObjCARCExpandPass(PassRegistry&);
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void initializeObjCARCContractPass(PassRegistry&);
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void initializeObjCARCOptPass(PassRegistry&);
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void initializeOptimizePHIsPass(PassRegistry&);
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void initializePartiallyInlineLibCallsPass(PassRegistry&);
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void initializePEIPass(PassRegistry&);
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void initializePHIEliminationPass(PassRegistry&);
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void initializePartialInlinerPass(PassRegistry&);
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void initializePeepholeOptimizerPass(PassRegistry&);
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void initializePostDomOnlyPrinterPass(PassRegistry&);
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void initializePostDomOnlyViewerPass(PassRegistry&);
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void initializePostDomPrinterPass(PassRegistry&);
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void initializePostDomViewerPass(PassRegistry&);
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void initializePostDominatorTreePass(PassRegistry&);
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void initializePostRASchedulerPass(PassRegistry&);
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void initializePreVerifierPass(PassRegistry&);
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void initializePrintFunctionPassPass(PassRegistry&);
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void initializePrintModulePassPass(PassRegistry&);
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void initializePrintBasicBlockPassPass(PassRegistry&);
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void initializeProcessImplicitDefsPass(PassRegistry&);
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void initializePromotePassPass(PassRegistry&);
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void initializePruneEHPass(PassRegistry&);
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void initializeReassociatePass(PassRegistry&);
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void initializeRegToMemPass(PassRegistry&);
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void initializeRegionInfoPass(PassRegistry&);
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void initializeRegionOnlyPrinterPass(PassRegistry&);
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void initializeRegionOnlyViewerPass(PassRegistry&);
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void initializeRegionPrinterPass(PassRegistry&);
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void initializeRegionViewerPass(PassRegistry&);
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void initializeSCCPPass(PassRegistry&);
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void initializeSROAPass(PassRegistry&);
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void initializeSROA_DTPass(PassRegistry&);
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void initializeSROA_SSAUpPass(PassRegistry&);
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void initializeScalarEvolutionAliasAnalysisPass(PassRegistry&);
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void initializeScalarEvolutionPass(PassRegistry&);
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void initializeSimpleInlinerPass(PassRegistry&);
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void initializeRegisterCoalescerPass(PassRegistry&);
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void initializeSingleLoopExtractorPass(PassRegistry&);
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void initializeSinkingPass(PassRegistry&);
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void initializeSlotIndexesPass(PassRegistry&);
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void initializeSpillPlacementPass(PassRegistry&);
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void initializeStackProtectorPass(PassRegistry&);
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void initializeStackColoringPass(PassRegistry&);
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void initializeStackSlotColoringPass(PassRegistry&);
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void initializeStripDeadDebugInfoPass(PassRegistry&);
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void initializeStripDeadPrototypesPassPass(PassRegistry&);
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void initializeStripDebugDeclarePass(PassRegistry&);
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void initializeStripNonDebugSymbolsPass(PassRegistry&);
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void initializeStripSymbolsPass(PassRegistry&);
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void initializeTailCallElimPass(PassRegistry&);
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void initializeTailDuplicatePassPass(PassRegistry&);
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void initializeTargetPassConfigPass(PassRegistry&);
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void initializeDataLayoutPass(PassRegistry&);
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void initializeTargetTransformInfoAnalysisGroup(PassRegistry&);
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void initializeNoTTIPass(PassRegistry&);
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void initializeTargetLibraryInfoPass(PassRegistry&);
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void initializeTwoAddressInstructionPassPass(PassRegistry&);
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void initializeTypeBasedAliasAnalysisPass(PassRegistry&);
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void initializeUnifyFunctionExitNodesPass(PassRegistry&);
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void initializeUnreachableBlockElimPass(PassRegistry&);
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void initializeUnreachableMachineBlockElimPass(PassRegistry&);
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void initializeVerifierPass(PassRegistry&);
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void initializeVirtRegMapPass(PassRegistry&);
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void initializeVirtRegRewriterPass(PassRegistry&);
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void initializeInstSimplifierPass(PassRegistry&);
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void initializeUnpackMachineBundlesPass(PassRegistry&);
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void initializeFinalizeMachineBundlesPass(PassRegistry&);
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void initializeLoopVectorizePass(PassRegistry&);
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void initializeSLPVectorizerPass(PassRegistry&);
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void initializeBBVectorizePass(PassRegistry&);
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void initializeMachineFunctionPrinterPassPass(PassRegistry&);
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}
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#endif
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