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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143716 91177308-0d34-0410-b5e6-96231b3b80d8
169 lines
6.5 KiB
C++
169 lines
6.5 KiB
C++
//===- llvm/DefaultPasses.h - Default Pass Support code --------*- 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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// This file defines the infrastructure for registering the standard pass list.
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// This defines sets of standard optimizations that plugins can modify and
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// front ends can use.
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEFAULT_PASS_SUPPORT_H
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#define LLVM_DEFAULT_PASS_SUPPORT_H
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#include <llvm/PassSupport.h>
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namespace llvm {
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class PassManagerBase;
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/// Unique identifiers for the default standard passes. The addresses of
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/// these symbols are used to uniquely identify passes from the default list.
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namespace DefaultStandardPasses {
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extern unsigned char AggressiveDCEID;
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extern unsigned char ArgumentPromotionID;
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extern unsigned char BasicAliasAnalysisID;
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extern unsigned char CFGSimplificationID;
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extern unsigned char ConstantMergeID;
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extern unsigned char CorrelatedValuePropagationID;
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extern unsigned char DeadArgEliminationID;
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extern unsigned char DeadStoreEliminationID;
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extern unsigned char EarlyCSEID;
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extern unsigned char FunctionAttrsID;
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extern unsigned char FunctionInliningID;
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extern unsigned char GVNID;
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extern unsigned char GlobalDCEID;
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extern unsigned char GlobalOptimizerID;
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extern unsigned char GlobalsModRefID;
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extern unsigned char IPSCCPID;
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extern unsigned char IndVarSimplifyID;
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extern unsigned char InlinerPlaceholderID;
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extern unsigned char InstructionCombiningID;
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extern unsigned char JumpThreadingID;
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extern unsigned char LICMID;
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extern unsigned char LoopDeletionID;
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extern unsigned char LoopIdiomID;
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extern unsigned char LoopRotateID;
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extern unsigned char LoopUnrollID;
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extern unsigned char LoopUnswitchID;
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extern unsigned char MemCpyOptID;
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extern unsigned char PruneEHID;
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extern unsigned char ReassociateID;
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extern unsigned char SCCPID;
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extern unsigned char ScalarReplAggregatesID;
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extern unsigned char SimplifyLibCallsID;
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extern unsigned char StripDeadPrototypesID;
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extern unsigned char TailCallEliminationID;
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extern unsigned char TypeBasedAliasAnalysisID;
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}
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/// StandardPass - The class responsible for maintaining the lists of standard
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class StandardPass {
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friend class RegisterStandardPassLists;
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public:
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/// Predefined standard sets of passes
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enum StandardSet {
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AliasAnalysis,
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Function,
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Module,
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LTO
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};
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/// Flags to specify whether a pass should be enabled. Passes registered
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/// with the standard sets may specify a minimum optimization level and one
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/// or more flags that must be set when constructing the set for the pass to
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/// be used.
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enum OptimizationFlags {
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/// Optimize for size was requested.
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OptimizeSize = 1<<0,
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/// Allow passes which may make global module changes.
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UnitAtATime = 1<<1,
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/// UnrollLoops - Allow loop unrolling.
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UnrollLoops = 1<<2,
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/// Allow library calls to be simplified.
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SimplifyLibCalls = 1<<3,
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/// Whether the module may have code using exceptions.
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HaveExceptions = 1<<4,
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// Run an inliner pass as part of this set.
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RunInliner = 1<<5
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};
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enum OptimizationFlagComponents {
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/// The low bits are used to store the optimization level. When requesting
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/// passes, this should store the requested optimisation level. When
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/// setting passes, this should set the minimum optimization level at which
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/// the pass will run.
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OptimizationLevelMask=0xf,
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/// The maximum optimisation level at which the pass is run.
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MaxOptimizationLevelMask=0xf0,
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// Flags that must be set
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RequiredFlagMask=0xff00,
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// Flags that may not be set.
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DisallowedFlagMask=0xff0000,
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MaxOptimizationLevelShift=4,
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RequiredFlagShift=8,
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DisallowedFlagShift=16
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};
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/// Returns the optimisation level from a set of flags.
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static unsigned OptimizationLevel(unsigned flags) {
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return flags & OptimizationLevelMask;
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}
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/// Returns the maximum optimization level for this set of flags
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static unsigned MaxOptimizationLevel(unsigned flags) {
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return (flags & MaxOptimizationLevelMask) >> 4;
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}
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/// Constructs a set of flags from the specified minimum and maximum
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/// optimisation level
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static unsigned OptimzationFlags(unsigned minLevel=0, unsigned maxLevel=0xf,
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unsigned requiredFlags=0, unsigned disallowedFlags=0) {
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return ((minLevel & OptimizationLevelMask) |
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((maxLevel<<MaxOptimizationLevelShift) & MaxOptimizationLevelMask)
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| ((requiredFlags<<RequiredFlagShift) & RequiredFlagMask)
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| ((disallowedFlags<<DisallowedFlagShift) & DisallowedFlagMask));
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}
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/// Returns the flags that must be set for this to match
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static unsigned RequiredFlags(unsigned flags) {
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return (flags & RequiredFlagMask) >> RequiredFlagShift;
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}
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/// Returns the flags that must not be set for this to match
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static unsigned DisallowedFlags(unsigned flags) {
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return (flags & DisallowedFlagMask) >> DisallowedFlagShift;
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}
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/// Register a standard pass in the specified set. If flags is non-zero,
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/// then the pass will only be returned when the specified flags are set.
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template<typename passName>
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class RegisterStandardPass {
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public:
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RegisterStandardPass(StandardSet set, unsigned char *runBefore=0,
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unsigned flags=0, unsigned char *ID=0) {
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// Use the pass's ID if one is not specified
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RegisterDefaultPass(PassInfo::NormalCtor_t(callDefaultCtor<passName>),
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ID ? ID : (unsigned char*)&passName::ID, runBefore, set, flags);
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}
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};
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/// Adds the passes from the specified set to the provided pass manager
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static void AddPassesFromSet(PassManagerBase *PM,
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StandardSet set,
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unsigned flags=0,
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bool VerifyEach=false,
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Pass *inliner=0);
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private:
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/// Registers the default passes. This is set by RegisterStandardPassLists
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/// and is called lazily.
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static void (*RegisterDefaultPasses)(void);
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/// Creates the verifier pass that is inserted when a VerifyEach is passed to
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/// AddPassesFromSet()
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static Pass* (*CreateVerifierPass)(void);
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/// Registers the pass
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static void RegisterDefaultPass(PassInfo::NormalCtor_t constructor,
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unsigned char *newPass,
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unsigned char *oldPass,
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StandardSet set,
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unsigned flags=0);
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};
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} // namespace llvm
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#endif
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