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-rw-r--r--lib/Analysis/BasicAliasAnalysis.cpp70
1 files changed, 35 insertions, 35 deletions
diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp
index 98508a8c14..ece6ce5a6f 100644
--- a/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/lib/Analysis/BasicAliasAnalysis.cpp
@@ -1,10 +1,10 @@
//===- BasicAliasAnalysis.cpp - Local Alias Analysis Impl -----------------===//
-//
+//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+//
//===----------------------------------------------------------------------===//
//
// This file defines the default implementation of the Alias Analysis interface
@@ -39,7 +39,7 @@ namespace {
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<TargetData>();
}
-
+
virtual void initializePass() {
TD = &getAnalysis<TargetData>();
}
@@ -53,7 +53,7 @@ namespace {
std::vector<PointerAccessInfo> *Info) {
return UnknownModRefBehavior;
}
-
+
virtual void getArgumentAccesses(Function *F, CallSite CS,
std::vector<PointerAccessInfo> &Info) {
assert(0 && "This method may not be called on this function!");
@@ -72,7 +72,7 @@ namespace {
virtual void deleteValue(Value *V) {}
virtual void copyValue(Value *From, Value *To) {}
};
-
+
// Register this pass...
RegisterOpt<NoAA>
U("no-aa", "No Alias Analysis (always returns 'may' alias)");
@@ -106,7 +106,7 @@ namespace {
virtual ModRefBehavior getModRefBehavior(Function *F, CallSite CS,
std::vector<PointerAccessInfo> *Info);
-
+
private:
// CheckGEPInstructions - Check two GEP instructions with known
// must-aliasing base pointers. This checks to see if the index expressions
@@ -117,7 +117,7 @@ namespace {
const Type *BasePtr2Ty, std::vector<Value*> &GEP2Ops,
unsigned G2Size);
};
-
+
// Register this pass...
RegisterOpt<BasicAliasAnalysis>
X("basicaa", "Basic Alias Analysis (default AA impl)");
@@ -144,7 +144,7 @@ static const Value *getUnderlyingObject(const Value *V) {
// If we are at some type of object... return it.
if (hasUniqueAddress(V) || isa<Argument>(V)) return V;
-
+
// Traverse through different addressing mechanisms...
if (const Instruction *I = dyn_cast<Instruction>(V)) {
if (isa<CastInst>(I) || isa<GetElementPtrInst>(I))
@@ -307,7 +307,7 @@ BasicAliasAnalysis::alias(const Value *V1, unsigned V1Size,
if (!isa<Argument>(O1) && isa<ConstantPointerNull>(V2))
return NoAlias; // Unique values don't alias null
- if (isa<GlobalVariable>(O1) ||
+ if (isa<GlobalVariable>(O1) ||
(isa<AllocationInst>(O1) &&
!cast<AllocationInst>(O1)->isArrayAllocation()))
if (cast<PointerType>(O1->getType())->getElementType()->isSized()) {
@@ -351,12 +351,12 @@ BasicAliasAnalysis::alias(const Value *V1, unsigned V1Size,
do {
BasePtr1 = cast<User>(BasePtr1)->getOperand(0);
} while (isGEP(BasePtr1) &&
- cast<User>(BasePtr1)->getOperand(1) ==
+ cast<User>(BasePtr1)->getOperand(1) ==
Constant::getNullValue(cast<User>(BasePtr1)->getOperand(1)->getType()));
do {
BasePtr2 = cast<User>(BasePtr2)->getOperand(0);
} while (isGEP(BasePtr2) &&
- cast<User>(BasePtr2)->getOperand(1) ==
+ cast<User>(BasePtr2)->getOperand(1) ==
Constant::getNullValue(cast<User>(BasePtr2)->getOperand(1)->getType()));
// Do the base pointers alias?
@@ -423,7 +423,7 @@ BasicAliasAnalysis::alias(const Value *V1, unsigned V1Size,
if (ConstantFound) {
if (V2Size <= 1 && V1Size <= 1) // Just pointer check?
return NoAlias;
-
+
// Otherwise we have to check to see that the distance is more than
// the size of the argument... build an index vector that is equal to
// the arguments provided, except substitute 0's for any variable
@@ -443,7 +443,7 @@ BasicAliasAnalysis::alias(const Value *V1, unsigned V1Size,
}
}
}
-
+
return MayAlias;
}
@@ -503,7 +503,7 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
// If so, return mustalias.
if (UnequalOper == MinOperands) {
if (GEP1Ops.size() < GEP2Ops.size()) std::swap(GEP1Ops, GEP2Ops);
-
+
bool AllAreZeros = true;
for (unsigned i = UnequalOper; i != MaxOperands; ++i)
if (!isa<Constant>(GEP1Ops[i]) ||
@@ -514,7 +514,7 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
if (AllAreZeros) return MustAlias;
}
-
+
// So now we know that the indexes derived from the base pointers,
// which are known to alias, are different. We can still determine a
// no-alias result if there are differing constant pairs in the index
@@ -530,7 +530,7 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
for (; FirstConstantOper != MinOperands; ++FirstConstantOper) {
const Value *G1Oper = GEP1Ops[FirstConstantOper];
const Value *G2Oper = GEP2Ops[FirstConstantOper];
-
+
if (G1Oper != G2Oper) // Found non-equal constant indexes...
if (Constant *G1OC = dyn_cast<ConstantInt>(const_cast<Value*>(G1Oper)))
if (Constant *G2OC = dyn_cast<ConstantInt>(const_cast<Value*>(G2Oper))){
@@ -555,7 +555,7 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
}
BasePtr1Ty = cast<CompositeType>(BasePtr1Ty)->getTypeAtIndex(G1Oper);
}
-
+
// No shared constant operands, and we ran out of common operands. At this
// point, the GEP instructions have run through all of their operands, and we
// haven't found evidence that there are any deltas between the GEP's.
@@ -585,13 +585,13 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
// Now crop off any constants from the end...
GEP1Ops.resize(MinOperands);
int64_t Offset2 = TD.getIndexedOffset(GEPPointerTy, GEP1Ops);
-
+
// If the tail provided a bit enough offset, return noalias!
if ((uint64_t)(Offset2-Offset1) >= SizeMax)
return NoAlias;
}
}
-
+
// Couldn't find anything useful.
return MayAlias;
}
@@ -604,7 +604,7 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
// Advance BasePtr[12]Ty over this first differing constant operand.
BasePtr2Ty = cast<CompositeType>(BasePtr1Ty)->getTypeAtIndex(GEP2Ops[FirstConstantOper]);
BasePtr1Ty = cast<CompositeType>(BasePtr1Ty)->getTypeAtIndex(GEP1Ops[FirstConstantOper]);
-
+
// We are going to be using TargetData::getIndexedOffset to determine the
// offset that each of the GEP's is reaching. To do this, we have to convert
// all variable references to constant references. To do this, we convert the
@@ -614,7 +614,7 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
GEP1Ops[i] = GEP2Ops[i] = Constant::getNullValue(Type::UIntTy);
// We know that GEP1Ops[FirstConstantOper] & GEP2Ops[FirstConstantOper] are ok
-
+
// Loop over the rest of the operands...
for (unsigned i = FirstConstantOper+1; i != MaxOperands; ++i) {
const Value *Op1 = i < GEP1Ops.size() ? GEP1Ops[i] : 0;
@@ -631,7 +631,7 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
if (const ArrayType *AT = dyn_cast<ArrayType>(BasePtr1Ty))
if (Op1C->getRawValue() >= AT->getNumElements())
return MayAlias; // Be conservative with out-of-range accesses
-
+
} else {
// GEP1 is known to produce a value less than GEP2. To be
// conservatively correct, we must assume the largest possible
@@ -647,7 +647,7 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
GEP1Ops[i] = ConstantSInt::get(Type::LongTy,AT->getNumElements()-1);
}
}
-
+
if (Op2) {
if (const ConstantInt *Op2C = dyn_cast<ConstantInt>(Op2)) {
// If this is an array index, make sure the array element is in range.
@@ -674,14 +674,14 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
BasePtr2Ty = 0;
}
}
-
+
if (GEPPointerTy->getElementType()->isSized()) {
int64_t Offset1 = getTargetData().getIndexedOffset(GEPPointerTy, GEP1Ops);
int64_t Offset2 = getTargetData().getIndexedOffset(GEPPointerTy, GEP2Ops);
assert(Offset1<Offset2 && "There is at least one different constant here!");
if ((uint64_t)(Offset2-Offset1) >= SizeMax) {
- //std::cerr << "Determined that these two GEP's don't alias ["
+ //std::cerr << "Determined that these two GEP's don't alias ["
// << SizeMax << " bytes]: \n" << *GEP1 << *GEP2;
return NoAlias;
}
@@ -706,11 +706,11 @@ static const char *DoesntAccessMemoryTable[] = {
"abs", "labs", "llabs", "imaxabs", "fabs", "fabsf", "fabsl",
"trunc", "truncf", "truncl", "ldexp",
-
+
"atan", "atanf", "atanl", "atan2", "atan2f", "atan2l",
"cbrt",
"cos", "cosf", "cosl", "cosh", "coshf", "coshl",
- "exp", "expf", "expl",
+ "exp", "expf", "expl",
"hypot",
"sin", "sinf", "sinl", "sinh", "sinhf", "sinhl",
"tan", "tanf", "tanl", "tanh", "tanhf", "tanhl",
@@ -723,9 +723,9 @@ static const char *DoesntAccessMemoryTable[] = {
"iswalnum", "iswalpha", "iswcntrl", "iswdigit", "iswgraph", "iswlower",
"iswprint", "iswpunct", "iswspace", "iswupper", "iswxdigit",
- "iswctype", "towctrans", "towlower", "towupper",
+ "iswctype", "towctrans", "towlower", "towupper",
- "btowc", "wctob",
+ "btowc", "wctob",
"isinf", "isnan", "finite",
@@ -744,16 +744,16 @@ static const unsigned DAMTableSize =
static const char *OnlyReadsMemoryTable[] = {
"atoi", "atol", "atof", "atoll", "atoq", "a64l",
- "bcmp", "memcmp", "memchr", "memrchr", "wmemcmp", "wmemchr",
+ "bcmp", "memcmp", "memchr", "memrchr", "wmemcmp", "wmemchr",
// Strings
"strcmp", "strcasecmp", "strcoll", "strncmp", "strncasecmp",
- "strchr", "strcspn", "strlen", "strpbrk", "strrchr", "strspn", "strstr",
+ "strchr", "strcspn", "strlen", "strpbrk", "strrchr", "strspn", "strstr",
"index", "rindex",
// Wide char strings
"wcschr", "wcscmp", "wcscoll", "wcscspn", "wcslen", "wcsncmp", "wcspbrk",
- "wcsrchr", "wcsspn", "wcsstr",
+ "wcsrchr", "wcsspn", "wcsstr",
// glibc
"alphasort", "alphasort64", "versionsort", "versionsort64",
@@ -768,8 +768,8 @@ static const char *OnlyReadsMemoryTable[] = {
static const unsigned ORMTableSize =
sizeof(OnlyReadsMemoryTable)/sizeof(OnlyReadsMemoryTable[0]);
-
-AliasAnalysis::ModRefBehavior
+
+AliasAnalysis::ModRefBehavior
BasicAliasAnalysis::getModRefBehavior(Function *F, CallSite CS,
std::vector<PointerAccessInfo> *Info) {
if (!F->isExternal()) return UnknownModRefBehavior;
@@ -789,7 +789,7 @@ BasicAliasAnalysis::getModRefBehavior(Function *F, CallSite CS,
F->getName().c_str(), StringCompare());
if (Ptr != DoesntAccessMemoryTable+DAMTableSize && *Ptr == F->getName())
return DoesNotAccessMemory;
-
+
Ptr = std::lower_bound(OnlyReadsMemoryTable,
OnlyReadsMemoryTable+ORMTableSize,
F->getName().c_str(), StringCompare());
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-06 21:50:04 +0000