diff options
Diffstat (limited to 'contrib/llvm/lib/Analysis/ScopedNoAliasAA.cpp')
| -rw-r--r-- | contrib/llvm/lib/Analysis/ScopedNoAliasAA.cpp | 202 |
1 files changed, 81 insertions, 121 deletions
diff --git a/contrib/llvm/lib/Analysis/ScopedNoAliasAA.cpp b/contrib/llvm/lib/Analysis/ScopedNoAliasAA.cpp index a5fca3e..029997a 100644 --- a/contrib/llvm/lib/Analysis/ScopedNoAliasAA.cpp +++ b/contrib/llvm/lib/Analysis/ScopedNoAliasAA.cpp @@ -32,22 +32,23 @@ // //===----------------------------------------------------------------------===// +#include "llvm/Analysis/ScopedNoAliasAA.h" #include "llvm/ADT/SmallPtrSet.h" -#include "llvm/Analysis/AliasAnalysis.h" -#include "llvm/Analysis/Passes.h" +#include "llvm/Analysis/TargetLibraryInfo.h" #include "llvm/IR/Constants.h" #include "llvm/IR/LLVMContext.h" #include "llvm/IR/Metadata.h" #include "llvm/IR/Module.h" #include "llvm/Pass.h" #include "llvm/Support/CommandLine.h" + using namespace llvm; // A handy option for disabling scoped no-alias functionality. The same effect // can also be achieved by stripping the associated metadata tags from IR, but // this option is sometimes more convenient. -static cl::opt<bool> -EnableScopedNoAlias("enable-scoped-noalias", cl::init(true)); +static cl::opt<bool> EnableScopedNoAlias("enable-scoped-noalias", + cl::init(true)); namespace { /// AliasScopeNode - This is a simple wrapper around an MDNode which provides @@ -57,7 +58,7 @@ class AliasScopeNode { const MDNode *Node; public: - AliasScopeNode() : Node(0) {} + AliasScopeNode() : Node(nullptr) {} explicit AliasScopeNode(const MDNode *N) : Node(N) {} /// getNode - Get the MDNode for this AliasScopeNode. @@ -70,79 +71,74 @@ public: return dyn_cast_or_null<MDNode>(Node->getOperand(1)); } }; +} // end of anonymous namespace -/// ScopedNoAliasAA - This is a simple alias analysis -/// implementation that uses scoped-noalias metadata to answer queries. -class ScopedNoAliasAA : public ImmutablePass, public AliasAnalysis { -public: - static char ID; // Class identification, replacement for typeinfo - ScopedNoAliasAA() : ImmutablePass(ID) { - initializeScopedNoAliasAAPass(*PassRegistry::getPassRegistry()); - } +AliasResult ScopedNoAliasAAResult::alias(const MemoryLocation &LocA, + const MemoryLocation &LocB) { + if (!EnableScopedNoAlias) + return AAResultBase::alias(LocA, LocB); - bool doInitialization(Module &M) override; + // Get the attached MDNodes. + const MDNode *AScopes = LocA.AATags.Scope, *BScopes = LocB.AATags.Scope; - /// getAdjustedAnalysisPointer - This method is used when a pass implements - /// an analysis interface through multiple inheritance. If needed, it - /// should override this to adjust the this pointer as needed for the - /// specified pass info. - void *getAdjustedAnalysisPointer(const void *PI) override { - if (PI == &AliasAnalysis::ID) - return (AliasAnalysis*)this; - return this; - } + const MDNode *ANoAlias = LocA.AATags.NoAlias, *BNoAlias = LocB.AATags.NoAlias; -protected: - bool mayAliasInScopes(const MDNode *Scopes, const MDNode *NoAlias) const; - void collectMDInDomain(const MDNode *List, const MDNode *Domain, - SmallPtrSetImpl<const MDNode *> &Nodes) const; - -private: - void getAnalysisUsage(AnalysisUsage &AU) const override; - AliasResult alias(const MemoryLocation &LocA, - const MemoryLocation &LocB) override; - bool pointsToConstantMemory(const MemoryLocation &Loc, bool OrLocal) override; - ModRefBehavior getModRefBehavior(ImmutableCallSite CS) override; - ModRefBehavior getModRefBehavior(const Function *F) override; - ModRefResult getModRefInfo(ImmutableCallSite CS, - const MemoryLocation &Loc) override; - ModRefResult getModRefInfo(ImmutableCallSite CS1, - ImmutableCallSite CS2) override; -}; -} // End of anonymous namespace + if (!mayAliasInScopes(AScopes, BNoAlias)) + return NoAlias; -// Register this pass... -char ScopedNoAliasAA::ID = 0; -INITIALIZE_AG_PASS(ScopedNoAliasAA, AliasAnalysis, "scoped-noalias", - "Scoped NoAlias Alias Analysis", false, true, false) + if (!mayAliasInScopes(BScopes, ANoAlias)) + return NoAlias; -ImmutablePass *llvm::createScopedNoAliasAAPass() { - return new ScopedNoAliasAA(); + // If they may alias, chain to the next AliasAnalysis. + return AAResultBase::alias(LocA, LocB); } -bool ScopedNoAliasAA::doInitialization(Module &M) { - InitializeAliasAnalysis(this, &M.getDataLayout()); - return true; +ModRefInfo ScopedNoAliasAAResult::getModRefInfo(ImmutableCallSite CS, + const MemoryLocation &Loc) { + if (!EnableScopedNoAlias) + return AAResultBase::getModRefInfo(CS, Loc); + + if (!mayAliasInScopes(Loc.AATags.Scope, CS.getInstruction()->getMetadata( + LLVMContext::MD_noalias))) + return MRI_NoModRef; + + if (!mayAliasInScopes( + CS.getInstruction()->getMetadata(LLVMContext::MD_alias_scope), + Loc.AATags.NoAlias)) + return MRI_NoModRef; + + return AAResultBase::getModRefInfo(CS, Loc); } -void -ScopedNoAliasAA::getAnalysisUsage(AnalysisUsage &AU) const { - AU.setPreservesAll(); - AliasAnalysis::getAnalysisUsage(AU); +ModRefInfo ScopedNoAliasAAResult::getModRefInfo(ImmutableCallSite CS1, + ImmutableCallSite CS2) { + if (!EnableScopedNoAlias) + return AAResultBase::getModRefInfo(CS1, CS2); + + if (!mayAliasInScopes( + CS1.getInstruction()->getMetadata(LLVMContext::MD_alias_scope), + CS2.getInstruction()->getMetadata(LLVMContext::MD_noalias))) + return MRI_NoModRef; + + if (!mayAliasInScopes( + CS2.getInstruction()->getMetadata(LLVMContext::MD_alias_scope), + CS1.getInstruction()->getMetadata(LLVMContext::MD_noalias))) + return MRI_NoModRef; + + return AAResultBase::getModRefInfo(CS1, CS2); } -void -ScopedNoAliasAA::collectMDInDomain(const MDNode *List, const MDNode *Domain, - SmallPtrSetImpl<const MDNode *> &Nodes) const { +void ScopedNoAliasAAResult::collectMDInDomain( + const MDNode *List, const MDNode *Domain, + SmallPtrSetImpl<const MDNode *> &Nodes) const { for (unsigned i = 0, ie = List->getNumOperands(); i != ie; ++i) if (const MDNode *MD = dyn_cast<MDNode>(List->getOperand(i))) if (AliasScopeNode(MD).getDomain() == Domain) Nodes.insert(MD); } -bool -ScopedNoAliasAA::mayAliasInScopes(const MDNode *Scopes, - const MDNode *NoAlias) const { +bool ScopedNoAliasAAResult::mayAliasInScopes(const MDNode *Scopes, + const MDNode *NoAlias) const { if (!Scopes || !NoAlias) return true; @@ -177,76 +173,40 @@ ScopedNoAliasAA::mayAliasInScopes(const MDNode *Scopes, return true; } -AliasResult ScopedNoAliasAA::alias(const MemoryLocation &LocA, - const MemoryLocation &LocB) { - if (!EnableScopedNoAlias) - return AliasAnalysis::alias(LocA, LocB); - - // Get the attached MDNodes. - const MDNode *AScopes = LocA.AATags.Scope, - *BScopes = LocB.AATags.Scope; +ScopedNoAliasAAResult ScopedNoAliasAA::run(Function &F, + AnalysisManager<Function> *AM) { + return ScopedNoAliasAAResult(AM->getResult<TargetLibraryAnalysis>(F)); +} - const MDNode *ANoAlias = LocA.AATags.NoAlias, - *BNoAlias = LocB.AATags.NoAlias; +char ScopedNoAliasAA::PassID; - if (!mayAliasInScopes(AScopes, BNoAlias)) - return NoAlias; - - if (!mayAliasInScopes(BScopes, ANoAlias)) - return NoAlias; +char ScopedNoAliasAAWrapperPass::ID = 0; +INITIALIZE_PASS_BEGIN(ScopedNoAliasAAWrapperPass, "scoped-noalias", + "Scoped NoAlias Alias Analysis", false, true) +INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass) +INITIALIZE_PASS_END(ScopedNoAliasAAWrapperPass, "scoped-noalias", + "Scoped NoAlias Alias Analysis", false, true) - // If they may alias, chain to the next AliasAnalysis. - return AliasAnalysis::alias(LocA, LocB); +ImmutablePass *llvm::createScopedNoAliasAAWrapperPass() { + return new ScopedNoAliasAAWrapperPass(); } -bool ScopedNoAliasAA::pointsToConstantMemory(const MemoryLocation &Loc, - bool OrLocal) { - return AliasAnalysis::pointsToConstantMemory(Loc, OrLocal); +ScopedNoAliasAAWrapperPass::ScopedNoAliasAAWrapperPass() : ImmutablePass(ID) { + initializeScopedNoAliasAAWrapperPassPass(*PassRegistry::getPassRegistry()); } -AliasAnalysis::ModRefBehavior -ScopedNoAliasAA::getModRefBehavior(ImmutableCallSite CS) { - return AliasAnalysis::getModRefBehavior(CS); +bool ScopedNoAliasAAWrapperPass::doInitialization(Module &M) { + Result.reset(new ScopedNoAliasAAResult( + getAnalysis<TargetLibraryInfoWrapperPass>().getTLI())); + return false; } -AliasAnalysis::ModRefBehavior -ScopedNoAliasAA::getModRefBehavior(const Function *F) { - return AliasAnalysis::getModRefBehavior(F); +bool ScopedNoAliasAAWrapperPass::doFinalization(Module &M) { + Result.reset(); + return false; } -AliasAnalysis::ModRefResult -ScopedNoAliasAA::getModRefInfo(ImmutableCallSite CS, - const MemoryLocation &Loc) { - if (!EnableScopedNoAlias) - return AliasAnalysis::getModRefInfo(CS, Loc); - - if (!mayAliasInScopes(Loc.AATags.Scope, CS.getInstruction()->getMetadata( - LLVMContext::MD_noalias))) - return NoModRef; - - if (!mayAliasInScopes( - CS.getInstruction()->getMetadata(LLVMContext::MD_alias_scope), - Loc.AATags.NoAlias)) - return NoModRef; - - return AliasAnalysis::getModRefInfo(CS, Loc); -} - -AliasAnalysis::ModRefResult -ScopedNoAliasAA::getModRefInfo(ImmutableCallSite CS1, ImmutableCallSite CS2) { - if (!EnableScopedNoAlias) - return AliasAnalysis::getModRefInfo(CS1, CS2); - - if (!mayAliasInScopes( - CS1.getInstruction()->getMetadata(LLVMContext::MD_alias_scope), - CS2.getInstruction()->getMetadata(LLVMContext::MD_noalias))) - return NoModRef; - - if (!mayAliasInScopes( - CS2.getInstruction()->getMetadata(LLVMContext::MD_alias_scope), - CS1.getInstruction()->getMetadata(LLVMContext::MD_noalias))) - return NoModRef; - - return AliasAnalysis::getModRefInfo(CS1, CS2); +void ScopedNoAliasAAWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const { + AU.setPreservesAll(); + AU.addRequired<TargetLibraryInfoWrapperPass>(); } - |
