"Number of block queries that were completely cached");
// Limit for the number of instructions to scan in a block.
-static const unsigned int BlockScanLimit = 100;
+
+static cl::opt<unsigned> BlockScanLimit(
+ "memdep-block-scan-limit", cl::Hidden, cl::init(100),
+ cl::desc("The number of instructions to scan in a block in memory "
+ "dependency analysis (default = 100)"));
// Limit on the number of memdep results to process.
static const unsigned int NumResultsLimit = 100;
/// location, fill in Loc with the details, otherwise set Loc.Ptr to null.
/// Return a ModRefInfo value describing the general behavior of the
/// instruction.
-static
-AliasAnalysis::ModRefResult GetLocation(const Instruction *Inst,
- AliasAnalysis::Location &Loc,
- AliasAnalysis *AA) {
+static AliasAnalysis::ModRefResult
+GetLocation(const Instruction *Inst, MemoryLocation &Loc, AliasAnalysis *AA) {
if (const LoadInst *LI = dyn_cast<LoadInst>(Inst)) {
if (LI->isUnordered()) {
- Loc = AA->getLocation(LI);
+ Loc = MemoryLocation::get(LI);
return AliasAnalysis::Ref;
}
if (LI->getOrdering() == Monotonic) {
- Loc = AA->getLocation(LI);
+ Loc = MemoryLocation::get(LI);
return AliasAnalysis::ModRef;
}
- Loc = AliasAnalysis::Location();
+ Loc = MemoryLocation();
return AliasAnalysis::ModRef;
}
if (const StoreInst *SI = dyn_cast<StoreInst>(Inst)) {
if (SI->isUnordered()) {
- Loc = AA->getLocation(SI);
+ Loc = MemoryLocation::get(SI);
return AliasAnalysis::Mod;
}
if (SI->getOrdering() == Monotonic) {
- Loc = AA->getLocation(SI);
+ Loc = MemoryLocation::get(SI);
return AliasAnalysis::ModRef;
}
- Loc = AliasAnalysis::Location();
+ Loc = MemoryLocation();
return AliasAnalysis::ModRef;
}
if (const VAArgInst *V = dyn_cast<VAArgInst>(Inst)) {
- Loc = AA->getLocation(V);
+ Loc = MemoryLocation::get(V);
return AliasAnalysis::ModRef;
}
if (const CallInst *CI = isFreeCall(Inst, AA->getTargetLibraryInfo())) {
// calls to free() deallocate the entire structure
- Loc = AliasAnalysis::Location(CI->getArgOperand(0));
+ Loc = MemoryLocation(CI->getArgOperand(0));
return AliasAnalysis::Mod;
}
case Intrinsic::lifetime_end:
case Intrinsic::invariant_start:
II->getAAMetadata(AAInfo);
- Loc = AliasAnalysis::Location(II->getArgOperand(1),
- cast<ConstantInt>(II->getArgOperand(0))
- ->getZExtValue(), AAInfo);
+ Loc = MemoryLocation(
+ II->getArgOperand(1),
+ cast<ConstantInt>(II->getArgOperand(0))->getZExtValue(), AAInfo);
// These intrinsics don't really modify the memory, but returning Mod
// will allow them to be handled conservatively.
return AliasAnalysis::Mod;
case Intrinsic::invariant_end:
II->getAAMetadata(AAInfo);
- Loc = AliasAnalysis::Location(II->getArgOperand(2),
- cast<ConstantInt>(II->getArgOperand(1))
- ->getZExtValue(), AAInfo);
+ Loc = MemoryLocation(
+ II->getArgOperand(2),
+ cast<ConstantInt>(II->getArgOperand(1))->getZExtValue(), AAInfo);
// These intrinsics don't really modify the memory, but returning Mod
// will allow them to be handled conservatively.
return AliasAnalysis::Mod;
Instruction *Inst = --ScanIt;
// If this inst is a memory op, get the pointer it accessed
- AliasAnalysis::Location Loc;
+ MemoryLocation Loc;
AliasAnalysis::ModRefResult MR = GetLocation(Inst, Loc, AA);
if (Loc.Ptr) {
// A simple instruction.
///
/// MemLocBase, MemLocOffset are lazily computed here the first time the
/// base/offs of memloc is needed.
-static bool isLoadLoadClobberIfExtendedToFullWidth(
- const AliasAnalysis::Location &MemLoc, const Value *&MemLocBase,
- int64_t &MemLocOffs, const LoadInst *LI) {
+static bool isLoadLoadClobberIfExtendedToFullWidth(const MemoryLocation &MemLoc,
+ const Value *&MemLocBase,
+ int64_t &MemLocOffs,
+ const LoadInst *LI) {
const DataLayout &DL = LI->getModule()->getDataLayout();
// If we haven't already computed the base/offset of MemLoc, do so now.
/// with reads from read-only locations. If possible, pass the query
/// instruction as well; this function may take advantage of the metadata
/// annotated to the query instruction to refine the result.
-MemDepResult MemoryDependenceAnalysis::
-getPointerDependencyFrom(const AliasAnalysis::Location &MemLoc, bool isLoad,
- BasicBlock::iterator ScanIt, BasicBlock *BB,
- Instruction *QueryInst) {
+MemDepResult MemoryDependenceAnalysis::getPointerDependencyFrom(
+ const MemoryLocation &MemLoc, bool isLoad, BasicBlock::iterator ScanIt,
+ BasicBlock *BB, Instruction *QueryInst) {
const Value *MemLocBase = nullptr;
int64_t MemLocOffset = 0;
// pointer, not on query pointers that are indexed off of them. It'd
// be nice to handle that at some point (the right approach is to use
// GetPointerBaseWithConstantOffset).
- if (AA->isMustAlias(AliasAnalysis::Location(II->getArgOperand(1)),
- MemLoc))
+ if (AA->isMustAlias(MemoryLocation(II->getArgOperand(1)), MemLoc))
return MemDepResult::getDef(II);
continue;
}
}
}
- AliasAnalysis::Location LoadLoc = AA->getLocation(LI);
+ MemoryLocation LoadLoc = MemoryLocation::get(LI);
// If we found a pointer, check if it could be the same as our pointer.
- AliasAnalysis::AliasResult R = AA->alias(LoadLoc, MemLoc);
+ AliasResult R = AA->alias(LoadLoc, MemLoc);
if (isLoad) {
- if (R == AliasAnalysis::NoAlias) {
+ if (R == NoAlias) {
// If this is an over-aligned integer load (for example,
// "load i8* %P, align 4") see if it would obviously overlap with the
// queried location if widened to a larger load (e.g. if the queried
}
// Must aliased loads are defs of each other.
- if (R == AliasAnalysis::MustAlias)
+ if (R == MustAlias)
return MemDepResult::getDef(Inst);
#if 0 // FIXME: Temporarily disabled. GVN is cleverly rewriting loads
// If we have a partial alias, then return this as a clobber for the
// client to handle.
- if (R == AliasAnalysis::PartialAlias)
+ if (R == PartialAlias)
return MemDepResult::getClobber(Inst);
#endif
}
// Stores don't depend on other no-aliased accesses.
- if (R == AliasAnalysis::NoAlias)
+ if (R == NoAlias)
continue;
// Stores don't alias loads from read-only memory.
// Ok, this store might clobber the query pointer. Check to see if it is
// a must alias: in this case, we want to return this as a def.
- AliasAnalysis::Location StoreLoc = AA->getLocation(SI);
+ MemoryLocation StoreLoc = MemoryLocation::get(SI);
// If we found a pointer, check if it could be the same as our pointer.
- AliasAnalysis::AliasResult R = AA->alias(StoreLoc, MemLoc);
+ AliasResult R = AA->alias(StoreLoc, MemLoc);
- if (R == AliasAnalysis::NoAlias)
+ if (R == NoAlias)
continue;
- if (R == AliasAnalysis::MustAlias)
+ if (R == MustAlias)
return MemDepResult::getDef(Inst);
if (isInvariantLoad)
continue;
if (isInvariantLoad)
continue;
// Be conservative if the accessed pointer may alias the allocation.
- if (AA->alias(Inst, AccessPtr) != AliasAnalysis::NoAlias)
+ if (AA->alias(Inst, AccessPtr) != NoAlias)
return MemDepResult::getClobber(Inst);
// If the allocation is not aliased and does not read memory (like
// strdup), it is safe to ignore.
else
LocalCache = MemDepResult::getNonFuncLocal();
} else {
- AliasAnalysis::Location MemLoc;
+ MemoryLocation MemLoc;
AliasAnalysis::ModRefResult MR = GetLocation(QueryInst, MemLoc, AA);
if (MemLoc.Ptr) {
// If we can do a pointer scan, make it happen.
void MemoryDependenceAnalysis::
getNonLocalPointerDependency(Instruction *QueryInst,
SmallVectorImpl<NonLocalDepResult> &Result) {
- const AliasAnalysis::Location Loc = AA->getLocation(QueryInst);
+ const MemoryLocation Loc = MemoryLocation::get(QueryInst);
bool isLoad = isa<LoadInst>(QueryInst);
BasicBlock *FromBB = QueryInst->getParent();
assert(FromBB);
/// Pointer/PointeeSize using either cached information in Cache or by doing a
/// lookup (which may use dirty cache info if available). If we do a lookup,
/// add the result to the cache.
-MemDepResult MemoryDependenceAnalysis::
-GetNonLocalInfoForBlock(Instruction *QueryInst,
- const AliasAnalysis::Location &Loc,
- bool isLoad, BasicBlock *BB,
- NonLocalDepInfo *Cache, unsigned NumSortedEntries) {
+MemDepResult MemoryDependenceAnalysis::GetNonLocalInfoForBlock(
+ Instruction *QueryInst, const MemoryLocation &Loc, bool isLoad,
+ BasicBlock *BB, NonLocalDepInfo *Cache, unsigned NumSortedEntries) {
// Do a binary search to see if we already have an entry for this block in
// the cache set. If so, find it.
/// This function returns false on success, or true to indicate that it could
/// not compute dependence information for some reason. This should be treated
/// as a clobber dependence on the first instruction in the predecessor block.
-bool MemoryDependenceAnalysis::
-getNonLocalPointerDepFromBB(Instruction *QueryInst,
- const PHITransAddr &Pointer,
- const AliasAnalysis::Location &Loc,
- bool isLoad, BasicBlock *StartBB,
- SmallVectorImpl<NonLocalDepResult> &Result,
- DenseMap<BasicBlock*, Value*> &Visited,
- bool SkipFirstBlock) {
+bool MemoryDependenceAnalysis::getNonLocalPointerDepFromBB(
+ Instruction *QueryInst, const PHITransAddr &Pointer,
+ const MemoryLocation &Loc, bool isLoad, BasicBlock *StartBB,
+ SmallVectorImpl<NonLocalDepResult> &Result,
+ DenseMap<BasicBlock *, Value *> &Visited, bool SkipFirstBlock) {
// Look up the cached info for Pointer.
ValueIsLoadPair CacheKey(Pointer.getAddr(), isLoad);
assert(!NonLocalDeps.count(RemInst) && "RemInst got reinserted?");
- AA->deleteValue(RemInst);
DEBUG(verifyRemoved(RemInst));
}
/// verifyRemoved - Verify that the specified instruction does not occur
projects / oota-llvm.git / blobdiff