#include "llvm/Analysis/AliasSetTracker.h"
#include "llvm/Analysis/AliasAnalysis.h"
-#include "llvm/Instructions.h"
-#include "llvm/IntrinsicInst.h"
-#include "llvm/LLVMContext.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/InstIterator.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Type.h"
#include "llvm/Pass.h"
-#include "llvm/Type.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Assembly/Writer.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/InstIterator.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
// If the pointers are not a must-alias pair, this set becomes a may alias.
if (AA.alias(AliasAnalysis::Location(L->getValue(),
L->getSize(),
- L->getTBAAInfo()),
+ L->getAAInfo()),
AliasAnalysis::Location(R->getValue(),
R->getSize(),
- R->getTBAAInfo()))
+ R->getAAInfo()))
!= AliasAnalysis::MustAlias)
AliasTy = MayAlias;
}
+ bool ASHadUnknownInsts = !AS.UnknownInsts.empty();
if (UnknownInsts.empty()) { // Merge call sites...
- if (!AS.UnknownInsts.empty())
+ if (ASHadUnknownInsts) {
std::swap(UnknownInsts, AS.UnknownInsts);
- } else if (!AS.UnknownInsts.empty()) {
+ addRef();
+ }
+ } else if (ASHadUnknownInsts) {
UnknownInsts.insert(UnknownInsts.end(), AS.UnknownInsts.begin(), AS.UnknownInsts.end());
AS.UnknownInsts.clear();
}
AS.PtrList->setPrevInList(PtrListEnd);
PtrListEnd = AS.PtrListEnd;
- AS.PtrList = 0;
+ AS.PtrList = nullptr;
AS.PtrListEnd = &AS.PtrList;
- assert(*AS.PtrListEnd == 0 && "End of list is not null?");
+ assert(*AS.PtrListEnd == nullptr && "End of list is not null?");
}
+ if (ASHadUnknownInsts)
+ AS.dropRef(AST);
}
void AliasSetTracker::removeAliasSet(AliasSet *AS) {
if (AliasSet *Fwd = AS->Forward) {
Fwd->dropRef(*this);
- AS->Forward = 0;
+ AS->Forward = nullptr;
}
AliasSets.erase(AS);
}
}
void AliasSet::addPointer(AliasSetTracker &AST, PointerRec &Entry,
- uint64_t Size, const MDNode *TBAAInfo,
+ uint64_t Size, const AAMDNodes &AAInfo,
bool KnownMustAlias) {
assert(!Entry.hasAliasSet() && "Entry already in set!");
AliasAnalysis &AA = AST.getAliasAnalysis();
AliasAnalysis::AliasResult Result =
AA.alias(AliasAnalysis::Location(P->getValue(), P->getSize(),
- P->getTBAAInfo()),
- AliasAnalysis::Location(Entry.getValue(), Size, TBAAInfo));
+ P->getAAInfo()),
+ AliasAnalysis::Location(Entry.getValue(), Size, AAInfo));
if (Result != AliasAnalysis::MustAlias)
AliasTy = MayAlias;
else // First entry of must alias must have maximum size!
- P->updateSizeAndTBAAInfo(Size, TBAAInfo);
+ P->updateSizeAndAAInfo(Size, AAInfo);
assert(Result != AliasAnalysis::NoAlias && "Cannot be part of must set!");
}
Entry.setAliasSet(this);
- Entry.updateSizeAndTBAAInfo(Size, TBAAInfo);
+ Entry.updateSizeAndAAInfo(Size, AAInfo);
// Add it to the end of the list...
- assert(*PtrListEnd == 0 && "End of list is not null?");
+ assert(*PtrListEnd == nullptr && "End of list is not null?");
*PtrListEnd = &Entry;
PtrListEnd = Entry.setPrevInList(PtrListEnd);
- assert(*PtrListEnd == 0 && "End of list is not null?");
+ assert(*PtrListEnd == nullptr && "End of list is not null?");
addRef(); // Entry points to alias set.
}
void AliasSet::addUnknownInst(Instruction *I, AliasAnalysis &AA) {
+ if (UnknownInsts.empty())
+ addRef();
UnknownInsts.push_back(I);
if (!I->mayWriteToMemory()) {
/// alias one of the members in the set.
///
bool AliasSet::aliasesPointer(const Value *Ptr, uint64_t Size,
- const MDNode *TBAAInfo,
+ const AAMDNodes &AAInfo,
AliasAnalysis &AA) const {
if (AliasTy == MustAlias) {
assert(UnknownInsts.empty() && "Illegal must alias set!");
assert(SomePtr && "Empty must-alias set??");
return AA.alias(AliasAnalysis::Location(SomePtr->getValue(),
SomePtr->getSize(),
- SomePtr->getTBAAInfo()),
- AliasAnalysis::Location(Ptr, Size, TBAAInfo));
+ SomePtr->getAAInfo()),
+ AliasAnalysis::Location(Ptr, Size, AAInfo));
}
// If this is a may-alias set, we have to check all of the pointers in the set
// to be sure it doesn't alias the set...
for (iterator I = begin(), E = end(); I != E; ++I)
- if (AA.alias(AliasAnalysis::Location(Ptr, Size, TBAAInfo),
+ if (AA.alias(AliasAnalysis::Location(Ptr, Size, AAInfo),
AliasAnalysis::Location(I.getPointer(), I.getSize(),
- I.getTBAAInfo())))
+ I.getAAInfo())))
return true;
// Check the unknown instructions...
if (!UnknownInsts.empty()) {
for (unsigned i = 0, e = UnknownInsts.size(); i != e; ++i)
if (AA.getModRefInfo(UnknownInsts[i],
- AliasAnalysis::Location(Ptr, Size, TBAAInfo)) !=
+ AliasAnalysis::Location(Ptr, Size, AAInfo)) !=
AliasAnalysis::NoModRef)
return true;
}
for (iterator I = begin(), E = end(); I != E; ++I)
if (AA.getModRefInfo(Inst, AliasAnalysis::Location(I.getPointer(),
I.getSize(),
- I.getTBAAInfo())) !=
+ I.getAAInfo())) !=
AliasAnalysis::NoModRef)
return true;
///
AliasSet *AliasSetTracker::findAliasSetForPointer(const Value *Ptr,
uint64_t Size,
- const MDNode *TBAAInfo) {
- AliasSet *FoundSet = 0;
- for (iterator I = begin(), E = end(); I != E; ++I) {
- if (I->Forward || !I->aliasesPointer(Ptr, Size, TBAAInfo, AA)) continue;
+ const AAMDNodes &AAInfo) {
+ AliasSet *FoundSet = nullptr;
+ for (iterator I = begin(), E = end(); I != E;) {
+ iterator Cur = I++;
+ if (Cur->Forward || !Cur->aliasesPointer(Ptr, Size, AAInfo, AA)) continue;
- if (FoundSet == 0) { // If this is the first alias set ptr can go into.
- FoundSet = I; // Remember it.
+ if (!FoundSet) { // If this is the first alias set ptr can go into.
+ FoundSet = Cur; // Remember it.
} else { // Otherwise, we must merge the sets.
- FoundSet->mergeSetIn(*I, *this); // Merge in contents.
+ FoundSet->mergeSetIn(*Cur, *this); // Merge in contents.
}
}
/// this alias set, false otherwise. This does not modify the AST object or
/// alias sets.
bool AliasSetTracker::containsPointer(Value *Ptr, uint64_t Size,
- const MDNode *TBAAInfo) const {
+ const AAMDNodes &AAInfo) const {
for (const_iterator I = begin(), E = end(); I != E; ++I)
- if (!I->Forward && I->aliasesPointer(Ptr, Size, TBAAInfo, AA))
+ if (!I->Forward && I->aliasesPointer(Ptr, Size, AAInfo, AA))
return true;
return false;
}
-
+bool AliasSetTracker::containsUnknown(Instruction *Inst) const {
+ for (const_iterator I = begin(), E = end(); I != E; ++I)
+ if (!I->Forward && I->aliasesUnknownInst(Inst, AA))
+ return true;
+ return false;
+}
AliasSet *AliasSetTracker::findAliasSetForUnknownInst(Instruction *Inst) {
- AliasSet *FoundSet = 0;
- for (iterator I = begin(), E = end(); I != E; ++I) {
- if (I->Forward || !I->aliasesUnknownInst(Inst, AA))
+ AliasSet *FoundSet = nullptr;
+ for (iterator I = begin(), E = end(); I != E;) {
+ iterator Cur = I++;
+ if (Cur->Forward || !Cur->aliasesUnknownInst(Inst, AA))
continue;
-
- if (FoundSet == 0) // If this is the first alias set ptr can go into.
- FoundSet = I; // Remember it.
- else if (!I->Forward) // Otherwise, we must merge the sets.
- FoundSet->mergeSetIn(*I, *this); // Merge in contents.
+ if (!FoundSet) // If this is the first alias set ptr can go into.
+ FoundSet = Cur; // Remember it.
+ else if (!Cur->Forward) // Otherwise, we must merge the sets.
+ FoundSet->mergeSetIn(*Cur, *this); // Merge in contents.
}
return FoundSet;
}
/// getAliasSetForPointer - Return the alias set that the specified pointer
/// lives in.
AliasSet &AliasSetTracker::getAliasSetForPointer(Value *Pointer, uint64_t Size,
- const MDNode *TBAAInfo,
+ const AAMDNodes &AAInfo,
bool *New) {
AliasSet::PointerRec &Entry = getEntryFor(Pointer);
// Check to see if the pointer is already known.
if (Entry.hasAliasSet()) {
- Entry.updateSizeAndTBAAInfo(Size, TBAAInfo);
+ Entry.updateSizeAndAAInfo(Size, AAInfo);
// Return the set!
return *Entry.getAliasSet(*this)->getForwardedTarget(*this);
}
- if (AliasSet *AS = findAliasSetForPointer(Pointer, Size, TBAAInfo)) {
+ if (AliasSet *AS = findAliasSetForPointer(Pointer, Size, AAInfo)) {
// Add it to the alias set it aliases.
- AS->addPointer(*this, Entry, Size, TBAAInfo);
+ AS->addPointer(*this, Entry, Size, AAInfo);
return *AS;
}
if (New) *New = true;
// Otherwise create a new alias set to hold the loaded pointer.
AliasSets.push_back(new AliasSet());
- AliasSets.back().addPointer(*this, Entry, Size, TBAAInfo);
+ AliasSets.back().addPointer(*this, Entry, Size, AAInfo);
return AliasSets.back();
}
-bool AliasSetTracker::add(Value *Ptr, uint64_t Size, const MDNode *TBAAInfo) {
+bool AliasSetTracker::add(Value *Ptr, uint64_t Size, const AAMDNodes &AAInfo) {
bool NewPtr;
- addPointer(Ptr, Size, TBAAInfo, AliasSet::NoModRef, NewPtr);
+ addPointer(Ptr, Size, AAInfo, AliasSet::NoModRef, NewPtr);
return NewPtr;
}
bool AliasSetTracker::add(LoadInst *LI) {
if (LI->getOrdering() > Monotonic) return addUnknown(LI);
+
+ AAMDNodes AAInfo;
+ LI->getAAMetadata(AAInfo);
+
AliasSet::AccessType ATy = AliasSet::Refs;
- if (!LI->isUnordered()) ATy = AliasSet::ModRef;
bool NewPtr;
AliasSet &AS = addPointer(LI->getOperand(0),
AA.getTypeStoreSize(LI->getType()),
- LI->getMetadata(LLVMContext::MD_tbaa),
- ATy, NewPtr);
+ AAInfo, ATy, NewPtr);
if (LI->isVolatile()) AS.setVolatile();
return NewPtr;
}
bool AliasSetTracker::add(StoreInst *SI) {
if (SI->getOrdering() > Monotonic) return addUnknown(SI);
+
+ AAMDNodes AAInfo;
+ SI->getAAMetadata(AAInfo);
+
AliasSet::AccessType ATy = AliasSet::Mods;
- if (!SI->isUnordered()) ATy = AliasSet::ModRef;
bool NewPtr;
Value *Val = SI->getOperand(0);
AliasSet &AS = addPointer(SI->getOperand(1),
AA.getTypeStoreSize(Val->getType()),
- SI->getMetadata(LLVMContext::MD_tbaa),
- ATy, NewPtr);
+ AAInfo, ATy, NewPtr);
if (SI->isVolatile()) AS.setVolatile();
return NewPtr;
}
bool AliasSetTracker::add(VAArgInst *VAAI) {
+ AAMDNodes AAInfo;
+ VAAI->getAAMetadata(AAInfo);
+
bool NewPtr;
addPointer(VAAI->getOperand(0), AliasAnalysis::UnknownSize,
- VAAI->getMetadata(LLVMContext::MD_tbaa),
- AliasSet::ModRef, NewPtr);
+ AAInfo, AliasSet::ModRef, NewPtr);
return NewPtr;
}
bool X;
for (AliasSet::iterator ASI = AS.begin(), E = AS.end(); ASI != E; ++ASI) {
AliasSet &NewAS = addPointer(ASI.getPointer(), ASI.getSize(),
- ASI.getTBAAInfo(),
+ ASI.getAAInfo(),
(AliasSet::AccessType)AS.AccessTy, X);
if (AS.isVolatile()) NewAS.setVolatile();
}
/// tracker.
void AliasSetTracker::remove(AliasSet &AS) {
// Drop all call sites.
+ if (!AS.UnknownInsts.empty())
+ AS.dropRef(*this);
AS.UnknownInsts.clear();
// Clear the alias set.
}
bool
-AliasSetTracker::remove(Value *Ptr, uint64_t Size, const MDNode *TBAAInfo) {
- AliasSet *AS = findAliasSetForPointer(Ptr, Size, TBAAInfo);
+AliasSetTracker::remove(Value *Ptr, uint64_t Size, const AAMDNodes &AAInfo) {
+ AliasSet *AS = findAliasSetForPointer(Ptr, Size, AAInfo);
if (!AS) return false;
remove(*AS);
return true;
bool AliasSetTracker::remove(LoadInst *LI) {
uint64_t Size = AA.getTypeStoreSize(LI->getType());
- const MDNode *TBAAInfo = LI->getMetadata(LLVMContext::MD_tbaa);
- AliasSet *AS = findAliasSetForPointer(LI->getOperand(0), Size, TBAAInfo);
+
+ AAMDNodes AAInfo;
+ LI->getAAMetadata(AAInfo);
+
+ AliasSet *AS = findAliasSetForPointer(LI->getOperand(0), Size, AAInfo);
if (!AS) return false;
remove(*AS);
return true;
bool AliasSetTracker::remove(StoreInst *SI) {
uint64_t Size = AA.getTypeStoreSize(SI->getOperand(0)->getType());
- const MDNode *TBAAInfo = SI->getMetadata(LLVMContext::MD_tbaa);
- AliasSet *AS = findAliasSetForPointer(SI->getOperand(1), Size, TBAAInfo);
+
+ AAMDNodes AAInfo;
+ SI->getAAMetadata(AAInfo);
+
+ AliasSet *AS = findAliasSetForPointer(SI->getOperand(1), Size, AAInfo);
if (!AS) return false;
remove(*AS);
return true;
}
bool AliasSetTracker::remove(VAArgInst *VAAI) {
+ AAMDNodes AAInfo;
+ VAAI->getAAMetadata(AAInfo);
+
AliasSet *AS = findAliasSetForPointer(VAAI->getOperand(0),
- AliasAnalysis::UnknownSize,
- VAAI->getMetadata(LLVMContext::MD_tbaa));
+ AliasAnalysis::UnknownSize, AAInfo);
if (!AS) return false;
remove(*AS);
return true;
if (Instruction *Inst = dyn_cast<Instruction>(PtrVal)) {
if (Inst->mayReadOrWriteMemory()) {
// Scan all the alias sets to see if this call site is contained.
- for (iterator I = begin(), E = end(); I != E; ++I) {
- if (I->Forward) continue;
-
- I->removeUnknownInst(Inst);
+ for (iterator I = begin(), E = end(); I != E;) {
+ iterator Cur = I++;
+ if (!Cur->Forward)
+ Cur->removeUnknownInst(*this, Inst);
}
}
}
I = PointerMap.find_as(From);
AliasSet *AS = I->second->getAliasSet(*this);
AS->addPointer(*this, Entry, I->second->getSize(),
- I->second->getTBAAInfo(),
+ I->second->getAAInfo(),
true);
}
OS << "Pointers: ";
for (iterator I = begin(), E = end(); I != E; ++I) {
if (I != begin()) OS << ", ";
- WriteAsOperand(OS << "(", I.getPointer());
+ I.getPointer()->printAsOperand(OS << "(");
OS << ", " << I.getSize() << ")";
}
}
OS << "\n " << UnknownInsts.size() << " Unknown instructions: ";
for (unsigned i = 0, e = UnknownInsts.size(); i != e; ++i) {
if (i) OS << ", ";
- WriteAsOperand(OS, UnknownInsts[i]);
+ UnknownInsts[i]->printAsOperand(OS);
}
}
OS << "\n";
OS << "\n";
}
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
void AliasSet::dump() const { print(dbgs()); }
void AliasSetTracker::dump() const { print(dbgs()); }
+#endif
//===----------------------------------------------------------------------===//
// ASTCallbackVH Class Implementation
initializeAliasSetPrinterPass(*PassRegistry::getPassRegistry());
}
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesAll();
AU.addRequired<AliasAnalysis>();
}
- virtual bool runOnFunction(Function &F) {
+ bool runOnFunction(Function &F) override {
Tracker = new AliasSetTracker(getAnalysis<AliasAnalysis>());
for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I)
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