#include "llvm/Analysis/AliasSetTracker.h"
#include "llvm/Analysis/AliasAnalysis.h"
-#include "llvm/Instructions.h"
-#include "llvm/IntrinsicInst.h"
-#include "llvm/LLVMContext.h"
-#include "llvm/Pass.h"
-#include "llvm/Type.h"
-#include "llvm/Target/TargetData.h"
#include "llvm/Assembly/Writer.h"
+#include "llvm/IR/DataLayout.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/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/InstIterator.h"
PointerRec *R = AS.getSomePointer();
// If the pointers are not a must-alias pair, this set becomes a may alias.
- if (AA.alias(L->getValue(), L->getSize(), R->getValue(), R->getSize())
+ if (AA.alias(AliasAnalysis::Location(L->getValue(),
+ L->getSize(),
+ L->getTBAAInfo()),
+ AliasAnalysis::Location(R->getValue(),
+ R->getSize(),
+ R->getTBAAInfo()))
!= AliasAnalysis::MustAlias)
AliasTy = MayAlias;
}
- if (CallSites.empty()) { // Merge call sites...
- if (!AS.CallSites.empty())
- std::swap(CallSites, AS.CallSites);
- } else if (!AS.CallSites.empty()) {
- CallSites.insert(CallSites.end(), AS.CallSites.begin(), AS.CallSites.end());
- AS.CallSites.clear();
+ if (UnknownInsts.empty()) { // Merge call sites...
+ if (!AS.UnknownInsts.empty())
+ std::swap(UnknownInsts, AS.UnknownInsts);
+ } else if (!AS.UnknownInsts.empty()) {
+ UnknownInsts.insert(UnknownInsts.end(), AS.UnknownInsts.begin(), AS.UnknownInsts.end());
+ AS.UnknownInsts.clear();
}
AS.Forward = this; // Forward across AS now...
AA.alias(AliasAnalysis::Location(P->getValue(), P->getSize(),
P->getTBAAInfo()),
AliasAnalysis::Location(Entry.getValue(), Size, TBAAInfo));
- if (Result == AliasAnalysis::MayAlias)
+ if (Result != AliasAnalysis::MustAlias)
AliasTy = MayAlias;
else // First entry of must alias must have maximum size!
P->updateSizeAndTBAAInfo(Size, TBAAInfo);
addRef(); // Entry points to alias set.
}
-void AliasSet::addCallSite(CallSite CS, AliasAnalysis &AA) {
- CallSites.push_back(CS.getInstruction());
+void AliasSet::addUnknownInst(Instruction *I, AliasAnalysis &AA) {
+ UnknownInsts.push_back(I);
- AliasAnalysis::ModRefBehavior Behavior = AA.getModRefBehavior(CS);
- if (Behavior == AliasAnalysis::DoesNotAccessMemory)
- return;
- if (AliasAnalysis::onlyReadsMemory(Behavior)) {
+ if (!I->mayWriteToMemory()) {
AliasTy = MayAlias;
AccessTy |= Refs;
return;
const MDNode *TBAAInfo,
AliasAnalysis &AA) const {
if (AliasTy == MustAlias) {
- assert(CallSites.empty() && "Illegal must alias set!");
+ assert(UnknownInsts.empty() && "Illegal must alias set!");
// If this is a set of MustAliases, only check to see if the pointer aliases
// SOME value in the set.
I.getTBAAInfo())))
return true;
- // Check the call sites list and invoke list...
- if (!CallSites.empty()) {
- for (unsigned i = 0, e = CallSites.size(); i != e; ++i)
- if (AA.getModRefInfo(CallSites[i],
+ // 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::NoModRef)
return true;
return false;
}
-bool AliasSet::aliasesCallSite(CallSite CS, AliasAnalysis &AA) const {
- if (AA.doesNotAccessMemory(CS))
+bool AliasSet::aliasesUnknownInst(Instruction *Inst, AliasAnalysis &AA) const {
+ if (!Inst->mayReadOrWriteMemory())
return false;
- for (unsigned i = 0, e = CallSites.size(); i != e; ++i) {
- if (AA.getModRefInfo(getCallSite(i), CS) != AliasAnalysis::NoModRef ||
- AA.getModRefInfo(CS, getCallSite(i)) != AliasAnalysis::NoModRef)
+ for (unsigned i = 0, e = UnknownInsts.size(); i != e; ++i) {
+ CallSite C1 = getUnknownInst(i), C2 = Inst;
+ if (!C1 || !C2 ||
+ AA.getModRefInfo(C1, C2) != AliasAnalysis::NoModRef ||
+ AA.getModRefInfo(C2, C1) != AliasAnalysis::NoModRef)
return true;
}
for (iterator I = begin(), E = end(); I != E; ++I)
- if (AA.getModRefInfo(CS, I.getPointer(), I.getSize()) !=
+ if (AA.getModRefInfo(Inst, AliasAnalysis::Location(I.getPointer(),
+ I.getSize(),
+ I.getTBAAInfo())) !=
AliasAnalysis::NoModRef)
return true;
-AliasSet *AliasSetTracker::findAliasSetForCallSite(CallSite CS) {
+AliasSet *AliasSetTracker::findAliasSetForUnknownInst(Instruction *Inst) {
AliasSet *FoundSet = 0;
for (iterator I = begin(), E = end(); I != E; ++I) {
- if (I->Forward || !I->aliasesCallSite(CS, AA))
+ if (I->Forward || !I->aliasesUnknownInst(Inst, AA))
continue;
if (FoundSet == 0) // If this is the first alias set ptr can go into.
bool AliasSetTracker::add(LoadInst *LI) {
+ if (LI->getOrdering() > Monotonic) return addUnknown(LI);
+ 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),
- AliasSet::Refs, NewPtr);
+ ATy, NewPtr);
if (LI->isVolatile()) AS.setVolatile();
return NewPtr;
}
bool AliasSetTracker::add(StoreInst *SI) {
+ if (SI->getOrdering() > Monotonic) return addUnknown(SI);
+ 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),
- AliasSet::Mods, NewPtr);
+ ATy, NewPtr);
if (SI->isVolatile()) AS.setVolatile();
return NewPtr;
}
}
-bool AliasSetTracker::add(CallSite CS) {
- if (isa<DbgInfoIntrinsic>(CS.getInstruction()))
+bool AliasSetTracker::addUnknown(Instruction *Inst) {
+ if (isa<DbgInfoIntrinsic>(Inst))
return true; // Ignore DbgInfo Intrinsics.
- if (AA.doesNotAccessMemory(CS))
+ if (!Inst->mayReadOrWriteMemory())
return true; // doesn't alias anything
- AliasSet *AS = findAliasSetForCallSite(CS);
+ AliasSet *AS = findAliasSetForUnknownInst(Inst);
if (AS) {
- AS->addCallSite(CS, AA);
+ AS->addUnknownInst(Inst, AA);
return false;
}
AliasSets.push_back(new AliasSet());
AS = &AliasSets.back();
- AS->addCallSite(CS, AA);
+ AS->addUnknownInst(Inst, AA);
return true;
}
return add(LI);
if (StoreInst *SI = dyn_cast<StoreInst>(I))
return add(SI);
- if (CallInst *CI = dyn_cast<CallInst>(I))
- return add(CI);
- if (InvokeInst *II = dyn_cast<InvokeInst>(I))
- return add(II);
if (VAArgInst *VAAI = dyn_cast<VAArgInst>(I))
return add(VAAI);
- return true;
+ return addUnknown(I);
}
void AliasSetTracker::add(BasicBlock &BB) {
AliasSet &AS = const_cast<AliasSet&>(*I);
// If there are any call sites in the alias set, add them to this AST.
- for (unsigned i = 0, e = AS.CallSites.size(); i != e; ++i)
- add(AS.CallSites[i]);
+ for (unsigned i = 0, e = AS.UnknownInsts.size(); i != e; ++i)
+ add(AS.UnknownInsts[i]);
// Loop over all of the pointers in this alias set.
bool X;
/// tracker.
void AliasSetTracker::remove(AliasSet &AS) {
// Drop all call sites.
- AS.CallSites.clear();
+ AS.UnknownInsts.clear();
// Clear the alias set.
unsigned NumRefs = 0;
return true;
}
-bool AliasSetTracker::remove(CallSite CS) {
- if (AA.doesNotAccessMemory(CS))
+bool AliasSetTracker::removeUnknown(Instruction *I) {
+ if (!I->mayReadOrWriteMemory())
return false; // doesn't alias anything
- AliasSet *AS = findAliasSetForCallSite(CS);
+ AliasSet *AS = findAliasSetForUnknownInst(I);
if (!AS) return false;
remove(*AS);
return true;
return remove(LI);
if (StoreInst *SI = dyn_cast<StoreInst>(I))
return remove(SI);
- if (CallInst *CI = dyn_cast<CallInst>(I))
- return remove(CI);
if (VAArgInst *VAAI = dyn_cast<VAArgInst>(I))
return remove(VAAI);
- return true;
+ return removeUnknown(I);
}
// If this is a call instruction, remove the callsite from the appropriate
// AliasSet (if present).
- if (CallSite CS = PtrVal) {
- if (!AA.doesNotAccessMemory(CS)) {
+ 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->removeCallSite(CS);
+ I->removeUnknownInst(Inst);
}
}
}
// First, look up the PointerRec for this pointer.
- PointerMapType::iterator I = PointerMap.find(PtrVal);
+ PointerMapType::iterator I = PointerMap.find_as(PtrVal);
if (I == PointerMap.end()) return; // Noop
// If we found one, remove the pointer from the alias set it is in.
AA.copyValue(From, To);
// First, look up the PointerRec for this pointer.
- PointerMapType::iterator I = PointerMap.find(From);
+ PointerMapType::iterator I = PointerMap.find_as(From);
if (I == PointerMap.end())
return; // Noop
assert(I->second->hasAliasSet() && "Dead entry?");
if (Entry.hasAliasSet()) return; // Already in the tracker!
// Add it to the alias set it aliases...
- I = PointerMap.find(From);
+ I = PointerMap.find_as(From);
AliasSet *AS = I->second->getAliasSet(*this);
AS->addPointer(*this, Entry, I->second->getSize(),
I->second->getTBAAInfo(),
//===----------------------------------------------------------------------===//
void AliasSet::print(raw_ostream &OS) const {
- OS << " AliasSet[" << (void*)this << ", " << RefCount << "] ";
+ OS << " AliasSet[" << (const void*)this << ", " << RefCount << "] ";
OS << (AliasTy == MustAlias ? "must" : "may") << " alias, ";
switch (AccessTy) {
case NoModRef: OS << "No access "; break;
OS << ", " << I.getSize() << ")";
}
}
- if (!CallSites.empty()) {
- OS << "\n " << CallSites.size() << " Call Sites: ";
- for (unsigned i = 0, e = CallSites.size(); i != e; ++i) {
+ if (!UnknownInsts.empty()) {
+ OS << "\n " << UnknownInsts.size() << " Unknown instructions: ";
+ for (unsigned i = 0, e = UnknownInsts.size(); i != e; ++i) {
if (i) OS << ", ";
- WriteAsOperand(OS, CallSites[i]);
+ WriteAsOperand(OS, UnknownInsts[i]);
}
}
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
// this now dangles!
}
+void AliasSetTracker::ASTCallbackVH::allUsesReplacedWith(Value *V) {
+ AST->copyValue(getValPtr(), V);
+}
+
AliasSetTracker::ASTCallbackVH::ASTCallbackVH(Value *V, AliasSetTracker *ast)
: CallbackVH(V), AST(ast) {}
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