[llvm] [builtin_object_size] Use classes instead of std::pair (NFC) (PR #76882)
via llvm-commits
llvm-commits at lists.llvm.org
Wed Jan 3 16:14:19 PST 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-compiler-rt-sanitizer
Author: Bill Wendling (bwendling)
<details>
<summary>Changes</summary>
The use of std::pair makes the values it holds opaque. Using classes
improves this while keeping the POD aspect of a std::pair. As a nice
addition, the "known" functions held inappropriately in the Visitor
classes can now properly reside in the value classes. :-)
---
Patch is 40.34 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/76882.diff
5 Files Affected:
- (modified) llvm/include/llvm/Analysis/MemoryBuiltins.h (+120-72)
- (modified) llvm/lib/Analysis/MemoryBuiltins.cpp (+163-151)
- (modified) llvm/lib/Transforms/IPO/AttributorAttributes.cpp (+4-4)
- (modified) llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp (+8-4)
- (modified) llvm/lib/Transforms/Instrumentation/BoundsChecking.cpp (+4-4)
``````````diff
diff --git a/llvm/include/llvm/Analysis/MemoryBuiltins.h b/llvm/include/llvm/Analysis/MemoryBuiltins.h
index 827b5081b2ce75..56faa32fb0b226 100644
--- a/llvm/include/llvm/Analysis/MemoryBuiltins.h
+++ b/llvm/include/llvm/Analysis/MemoryBuiltins.h
@@ -187,80 +187,146 @@ Value *lowerObjectSizeCall(
const TargetLibraryInfo *TLI, AAResults *AA, bool MustSucceed,
SmallVectorImpl<Instruction *> *InsertedInstructions = nullptr);
-using SizeOffsetType = std::pair<APInt, APInt>;
+/// SizeOffsetType - A base template class for the object size visitors. Used
+/// here as a self-documenting way to handle the values rather than using a
+/// \p std::pair.
+template <typename T> struct SizeOffsetType {
+ T Size;
+ T Offset;
+
+ bool knownSize() const;
+ bool knownOffset() const;
+ bool anyKnown() const;
+ bool bothKnown() const;
+};
+
+/// SizeOffsetType<APInt> - Used by \p ObjectSizeOffsetVisitor, which works
+/// with \p APInts.
+template <> struct SizeOffsetType<APInt> {
+ APInt Size;
+ APInt Offset;
+
+ SizeOffsetType() = default;
+ SizeOffsetType(APInt Size, APInt Offset) : Size(Size), Offset(Offset) {}
+
+ bool knownSize() const { return Size.getBitWidth() > 1; }
+ bool knownOffset() const { return Offset.getBitWidth() > 1; }
+ bool anyKnown() const { return knownSize() || knownOffset(); }
+ bool bothKnown() const { return knownSize() && knownOffset(); }
+
+ bool operator==(const SizeOffsetType<APInt> &RHS) {
+ return Size == RHS.Size && Offset == RHS.Offset;
+ }
+ bool operator!=(const SizeOffsetType<APInt> &RHS) { return !(*this == RHS); }
+};
+using SizeOffsetAPInt = SizeOffsetType<APInt>;
/// Evaluate the size and offset of an object pointed to by a Value*
/// statically. Fails if size or offset are not known at compile time.
class ObjectSizeOffsetVisitor
- : public InstVisitor<ObjectSizeOffsetVisitor, SizeOffsetType> {
+ : public InstVisitor<ObjectSizeOffsetVisitor, SizeOffsetAPInt> {
const DataLayout &DL;
const TargetLibraryInfo *TLI;
ObjectSizeOpts Options;
unsigned IntTyBits;
APInt Zero;
- SmallDenseMap<Instruction *, SizeOffsetType, 8> SeenInsts;
+ SmallDenseMap<Instruction *, SizeOffsetAPInt, 8> SeenInsts;
unsigned InstructionsVisited;
APInt align(APInt Size, MaybeAlign Align);
- SizeOffsetType unknown() {
- return std::make_pair(APInt(), APInt());
- }
+ static SizeOffsetAPInt unknown;
public:
ObjectSizeOffsetVisitor(const DataLayout &DL, const TargetLibraryInfo *TLI,
LLVMContext &Context, ObjectSizeOpts Options = {});
- SizeOffsetType compute(Value *V);
-
- static bool knownSize(const SizeOffsetType &SizeOffset) {
- return SizeOffset.first.getBitWidth() > 1;
- }
-
- static bool knownOffset(const SizeOffsetType &SizeOffset) {
- return SizeOffset.second.getBitWidth() > 1;
- }
-
- static bool bothKnown(const SizeOffsetType &SizeOffset) {
- return knownSize(SizeOffset) && knownOffset(SizeOffset);
- }
+ SizeOffsetAPInt compute(Value *V);
// These are "private", except they can't actually be made private. Only
// compute() should be used by external users.
- SizeOffsetType visitAllocaInst(AllocaInst &I);
- SizeOffsetType visitArgument(Argument &A);
- SizeOffsetType visitCallBase(CallBase &CB);
- SizeOffsetType visitConstantPointerNull(ConstantPointerNull&);
- SizeOffsetType visitExtractElementInst(ExtractElementInst &I);
- SizeOffsetType visitExtractValueInst(ExtractValueInst &I);
- SizeOffsetType visitGlobalAlias(GlobalAlias &GA);
- SizeOffsetType visitGlobalVariable(GlobalVariable &GV);
- SizeOffsetType visitIntToPtrInst(IntToPtrInst&);
- SizeOffsetType visitLoadInst(LoadInst &I);
- SizeOffsetType visitPHINode(PHINode&);
- SizeOffsetType visitSelectInst(SelectInst &I);
- SizeOffsetType visitUndefValue(UndefValue&);
- SizeOffsetType visitInstruction(Instruction &I);
+ SizeOffsetAPInt visitAllocaInst(AllocaInst &I);
+ SizeOffsetAPInt visitArgument(Argument &A);
+ SizeOffsetAPInt visitCallBase(CallBase &CB);
+ SizeOffsetAPInt visitConstantPointerNull(ConstantPointerNull &);
+ SizeOffsetAPInt visitExtractElementInst(ExtractElementInst &I);
+ SizeOffsetAPInt visitExtractValueInst(ExtractValueInst &I);
+ SizeOffsetAPInt visitGlobalAlias(GlobalAlias &GA);
+ SizeOffsetAPInt visitGlobalVariable(GlobalVariable &GV);
+ SizeOffsetAPInt visitIntToPtrInst(IntToPtrInst &);
+ SizeOffsetAPInt visitLoadInst(LoadInst &I);
+ SizeOffsetAPInt visitPHINode(PHINode &);
+ SizeOffsetAPInt visitSelectInst(SelectInst &I);
+ SizeOffsetAPInt visitUndefValue(UndefValue &);
+ SizeOffsetAPInt visitInstruction(Instruction &I);
private:
- SizeOffsetType findLoadSizeOffset(
+ SizeOffsetAPInt findLoadSizeOffset(
LoadInst &LoadFrom, BasicBlock &BB, BasicBlock::iterator From,
- SmallDenseMap<BasicBlock *, SizeOffsetType, 8> &VisitedBlocks,
+ SmallDenseMap<BasicBlock *, SizeOffsetAPInt, 8> &VisitedBlocks,
unsigned &ScannedInstCount);
- SizeOffsetType combineSizeOffset(SizeOffsetType LHS, SizeOffsetType RHS);
- SizeOffsetType computeImpl(Value *V);
- SizeOffsetType computeValue(Value *V);
+ SizeOffsetAPInt combineSizeOffset(SizeOffsetAPInt LHS, SizeOffsetAPInt RHS);
+ SizeOffsetAPInt computeImpl(Value *V);
+ SizeOffsetAPInt computeValue(Value *V);
bool CheckedZextOrTrunc(APInt &I);
};
-using SizeOffsetEvalType = std::pair<Value *, Value *>;
+template <> struct SizeOffsetType<WeakTrackingVH>;
+
+/// SizeOffsetType<Value *> - Used by \p ObjectSizeOffsetEvaluator, which works
+/// with \p Values.
+template <> struct SizeOffsetType<Value *> {
+ Value *Size;
+ Value *Offset;
+
+ SizeOffsetType() = default;
+ SizeOffsetType(Value *Size, Value *Offset) : Size(Size), Offset(Offset) {}
+ SizeOffsetType(SizeOffsetType<WeakTrackingVH> &SOT);
+
+ bool knownSize() const { return Size != nullptr; }
+ bool knownOffset() const { return Offset != nullptr; }
+ bool anyKnown() const { return knownSize() || knownOffset(); }
+ bool bothKnown() const { return knownSize() && knownOffset(); }
+
+ bool operator==(const SizeOffsetType<Value *> &RHS) {
+ return Size == RHS.Size && Offset == RHS.Offset;
+ }
+ bool operator!=(const SizeOffsetType<Value *> &RHS) {
+ return !(*this == RHS);
+ }
+};
+using SizeOffsetValue = SizeOffsetType<Value *>;
+
+/// SizeOffsetType<WeakTrackingVH> - Used by \p ObjectSizeOffsetEvaluator in a
+/// \p DenseMap.
+template <> struct SizeOffsetType<WeakTrackingVH> {
+ WeakTrackingVH Size;
+ WeakTrackingVH Offset;
+
+ SizeOffsetType() = default;
+ SizeOffsetType(Value *Size, Value *Offset) : Size(Size), Offset(Offset) {}
+
+ bool knownSize() const { return Size.pointsToAliveValue(); }
+ bool knownOffset() const { return Offset.pointsToAliveValue(); }
+ bool anyKnown() const { return knownSize() || knownOffset(); }
+ bool bothKnown() const { return knownSize() && knownOffset(); }
+
+ bool operator==(const SizeOffsetType<Value *> &RHS) {
+ return (Value *)Size == (Value *)RHS.Size &&
+ (Value *)Offset == (Value *)RHS.Offset;
+ }
+ bool operator!=(const SizeOffsetType<Value *> &RHS) {
+ return !(*this == RHS);
+ }
+};
+using SizeOffsetWeakTrackingVH = SizeOffsetType<WeakTrackingVH>;
/// Evaluate the size and offset of an object pointed to by a Value*.
/// May create code to compute the result at run-time.
class ObjectSizeOffsetEvaluator
- : public InstVisitor<ObjectSizeOffsetEvaluator, SizeOffsetEvalType> {
+ : public InstVisitor<ObjectSizeOffsetEvaluator, SizeOffsetValue> {
using BuilderTy = IRBuilder<TargetFolder, IRBuilderCallbackInserter>;
- using WeakEvalType = std::pair<WeakTrackingVH, WeakTrackingVH>;
+ using WeakEvalType = SizeOffsetType<WeakTrackingVH>;
using CacheMapTy = DenseMap<const Value *, WeakEvalType>;
using PtrSetTy = SmallPtrSet<const Value *, 8>;
@@ -275,45 +341,27 @@ class ObjectSizeOffsetEvaluator
ObjectSizeOpts EvalOpts;
SmallPtrSet<Instruction *, 8> InsertedInstructions;
- SizeOffsetEvalType compute_(Value *V);
+ SizeOffsetValue compute_(Value *V);
public:
- static SizeOffsetEvalType unknown() {
- return std::make_pair(nullptr, nullptr);
- }
-
ObjectSizeOffsetEvaluator(const DataLayout &DL, const TargetLibraryInfo *TLI,
LLVMContext &Context, ObjectSizeOpts EvalOpts = {});
- SizeOffsetEvalType compute(Value *V);
+ static SizeOffsetValue unknown;
- bool knownSize(SizeOffsetEvalType SizeOffset) {
- return SizeOffset.first;
- }
-
- bool knownOffset(SizeOffsetEvalType SizeOffset) {
- return SizeOffset.second;
- }
-
- bool anyKnown(SizeOffsetEvalType SizeOffset) {
- return knownSize(SizeOffset) || knownOffset(SizeOffset);
- }
-
- bool bothKnown(SizeOffsetEvalType SizeOffset) {
- return knownSize(SizeOffset) && knownOffset(SizeOffset);
- }
+ SizeOffsetValue compute(Value *V);
// The individual instruction visitors should be treated as private.
- SizeOffsetEvalType visitAllocaInst(AllocaInst &I);
- SizeOffsetEvalType visitCallBase(CallBase &CB);
- SizeOffsetEvalType visitExtractElementInst(ExtractElementInst &I);
- SizeOffsetEvalType visitExtractValueInst(ExtractValueInst &I);
- SizeOffsetEvalType visitGEPOperator(GEPOperator &GEP);
- SizeOffsetEvalType visitIntToPtrInst(IntToPtrInst&);
- SizeOffsetEvalType visitLoadInst(LoadInst &I);
- SizeOffsetEvalType visitPHINode(PHINode &PHI);
- SizeOffsetEvalType visitSelectInst(SelectInst &I);
- SizeOffsetEvalType visitInstruction(Instruction &I);
+ SizeOffsetValue visitAllocaInst(AllocaInst &I);
+ SizeOffsetValue visitCallBase(CallBase &CB);
+ SizeOffsetValue visitExtractElementInst(ExtractElementInst &I);
+ SizeOffsetValue visitExtractValueInst(ExtractValueInst &I);
+ SizeOffsetValue visitGEPOperator(GEPOperator &GEP);
+ SizeOffsetValue visitIntToPtrInst(IntToPtrInst &);
+ SizeOffsetValue visitLoadInst(LoadInst &I);
+ SizeOffsetValue visitPHINode(PHINode &PHI);
+ SizeOffsetValue visitSelectInst(SelectInst &I);
+ SizeOffsetValue visitInstruction(Instruction &I);
};
} // end namespace llvm
diff --git a/llvm/lib/Analysis/MemoryBuiltins.cpp b/llvm/lib/Analysis/MemoryBuiltins.cpp
index 9e6811f3bf8815..8cc2d070d1d8e7 100644
--- a/llvm/lib/Analysis/MemoryBuiltins.cpp
+++ b/llvm/lib/Analysis/MemoryBuiltins.cpp
@@ -577,10 +577,12 @@ Value *llvm::getFreedOperand(const CallBase *CB, const TargetLibraryInfo *TLI) {
//===----------------------------------------------------------------------===//
// Utility functions to compute size of objects.
//
-static APInt getSizeWithOverflow(const SizeOffsetType &Data) {
- if (Data.second.isNegative() || Data.first.ult(Data.second))
- return APInt(Data.first.getBitWidth(), 0);
- return Data.first - Data.second;
+static APInt getSizeWithOverflow(const SizeOffsetAPInt &Data) {
+ APInt Size = Data.Size;
+ APInt Offset = Data.Offset;
+ if (Offset.isNegative() || Size.ult(Size))
+ return APInt(Size.getBitWidth(), 0);
+ return Size - Offset;
}
/// Compute the size of the object pointed by Ptr. Returns true and the
@@ -590,8 +592,8 @@ static APInt getSizeWithOverflow(const SizeOffsetType &Data) {
bool llvm::getObjectSize(const Value *Ptr, uint64_t &Size, const DataLayout &DL,
const TargetLibraryInfo *TLI, ObjectSizeOpts Opts) {
ObjectSizeOffsetVisitor Visitor(DL, TLI, Ptr->getContext(), Opts);
- SizeOffsetType Data = Visitor.compute(const_cast<Value*>(Ptr));
- if (!Visitor.bothKnown(Data))
+ SizeOffsetAPInt Data = Visitor.compute(const_cast<Value *>(Ptr));
+ if (!Data.bothKnown())
return false;
Size = getSizeWithOverflow(Data).getZExtValue();
@@ -640,10 +642,9 @@ Value *llvm::lowerObjectSizeCall(
} else {
LLVMContext &Ctx = ObjectSize->getFunction()->getContext();
ObjectSizeOffsetEvaluator Eval(DL, TLI, Ctx, EvalOptions);
- SizeOffsetEvalType SizeOffsetPair =
- Eval.compute(ObjectSize->getArgOperand(0));
+ SizeOffsetValue SizeOffsetPair = Eval.compute(ObjectSize->getArgOperand(0));
- if (SizeOffsetPair != ObjectSizeOffsetEvaluator::unknown()) {
+ if (SizeOffsetPair != ObjectSizeOffsetEvaluator::unknown) {
IRBuilder<TargetFolder, IRBuilderCallbackInserter> Builder(
Ctx, TargetFolder(DL), IRBuilderCallbackInserter([&](Instruction *I) {
if (InsertedInstructions)
@@ -651,19 +652,19 @@ Value *llvm::lowerObjectSizeCall(
}));
Builder.SetInsertPoint(ObjectSize);
+ Value *Size = SizeOffsetPair.Size;
+ Value *Offset = SizeOffsetPair.Offset;
+
// If we've outside the end of the object, then we can always access
// exactly 0 bytes.
- Value *ResultSize =
- Builder.CreateSub(SizeOffsetPair.first, SizeOffsetPair.second);
- Value *UseZero =
- Builder.CreateICmpULT(SizeOffsetPair.first, SizeOffsetPair.second);
+ Value *ResultSize = Builder.CreateSub(Size, Offset);
+ Value *UseZero = Builder.CreateICmpULT(Size, Offset);
ResultSize = Builder.CreateZExtOrTrunc(ResultSize, ResultType);
Value *Ret = Builder.CreateSelect(
UseZero, ConstantInt::get(ResultType, 0), ResultSize);
// The non-constant size expression cannot evaluate to -1.
- if (!isa<Constant>(SizeOffsetPair.first) ||
- !isa<Constant>(SizeOffsetPair.second))
+ if (!isa<Constant>(Size) || !isa<Constant>(Offset))
Builder.CreateAssumption(
Builder.CreateICmpNE(Ret, ConstantInt::get(ResultType, -1)));
@@ -682,6 +683,8 @@ STATISTIC(ObjectVisitorArgument,
STATISTIC(ObjectVisitorLoad,
"Number of load instructions with unsolved size and offset");
+SizeOffsetAPInt ObjectSizeOffsetVisitor::unknown;
+
APInt ObjectSizeOffsetVisitor::align(APInt Size, MaybeAlign Alignment) {
if (Options.RoundToAlign && Alignment)
return APInt(IntTyBits, alignTo(Size.getZExtValue(), *Alignment));
@@ -697,12 +700,12 @@ ObjectSizeOffsetVisitor::ObjectSizeOffsetVisitor(const DataLayout &DL,
// a different address space.
}
-SizeOffsetType ObjectSizeOffsetVisitor::compute(Value *V) {
+SizeOffsetAPInt ObjectSizeOffsetVisitor::compute(Value *V) {
InstructionsVisited = 0;
return computeImpl(V);
}
-SizeOffsetType ObjectSizeOffsetVisitor::computeImpl(Value *V) {
+SizeOffsetAPInt ObjectSizeOffsetVisitor::computeImpl(Value *V) {
unsigned InitialIntTyBits = DL.getIndexTypeSizeInBits(V->getType());
// Stripping pointer casts can strip address space casts which can change the
@@ -719,7 +722,7 @@ SizeOffsetType ObjectSizeOffsetVisitor::computeImpl(Value *V) {
IntTyBits = DL.getIndexTypeSizeInBits(V->getType());
Zero = APInt::getZero(IntTyBits);
- SizeOffsetType SOT = computeValue(V);
+ SizeOffsetAPInt SOT = computeValue(V);
bool IndexTypeSizeChanged = InitialIntTyBits != IntTyBits;
if (!IndexTypeSizeChanged && Offset.isZero())
@@ -729,27 +732,28 @@ SizeOffsetType ObjectSizeOffsetVisitor::computeImpl(Value *V) {
// accumulated some constant offset (or both). Readjust the bit width to match
// the argument index type size and apply the offset, as required.
if (IndexTypeSizeChanged) {
- if (knownSize(SOT) && !::CheckedZextOrTrunc(SOT.first, InitialIntTyBits))
- SOT.first = APInt();
- if (knownOffset(SOT) && !::CheckedZextOrTrunc(SOT.second, InitialIntTyBits))
- SOT.second = APInt();
+ if (SOT.knownSize() && !::CheckedZextOrTrunc(SOT.Size, InitialIntTyBits))
+ SOT.Size = APInt();
+ if (SOT.knownOffset() &&
+ !::CheckedZextOrTrunc(SOT.Offset, InitialIntTyBits))
+ SOT.Offset = APInt();
}
// If the computed offset is "unknown" we cannot add the stripped offset.
- return {SOT.first,
- SOT.second.getBitWidth() > 1 ? SOT.second + Offset : SOT.second};
+ return {SOT.Size,
+ SOT.Offset.getBitWidth() > 1 ? SOT.Offset + Offset : SOT.Offset};
}
-SizeOffsetType ObjectSizeOffsetVisitor::computeValue(Value *V) {
+SizeOffsetAPInt ObjectSizeOffsetVisitor::computeValue(Value *V) {
if (Instruction *I = dyn_cast<Instruction>(V)) {
// If we have already seen this instruction, bail out. Cycles can happen in
// unreachable code after constant propagation.
- auto P = SeenInsts.try_emplace(I, unknown());
+ auto P = SeenInsts.try_emplace(I, ObjectSizeOffsetVisitor::unknown);
if (!P.second)
return P.first->second;
++InstructionsVisited;
if (InstructionsVisited > ObjectSizeOffsetVisitorMaxVisitInstructions)
- return unknown();
- SizeOffsetType Res = visit(*I);
+ return ObjectSizeOffsetVisitor::unknown;
+ SizeOffsetAPInt Res = visit(*I);
// Cache the result for later visits. If we happened to visit this during
// the above recursion, we would consider it unknown until now.
SeenInsts[I] = Res;
@@ -768,55 +772,55 @@ SizeOffsetType ObjectSizeOffsetVisitor::computeValue(Value *V) {
LLVM_DEBUG(dbgs() << "ObjectSizeOffsetVisitor::compute() unhandled value: "
<< *V << '\n');
- return unknown();
+ return ObjectSizeOffsetVisitor::unknown;
}
bool ObjectSizeOffsetVisitor::CheckedZextOrTrunc(APInt &I) {
return ::CheckedZextOrTrunc(I, IntTyBits);
}
-SizeOffsetType ObjectSizeOffsetVisitor::visitAllocaInst(AllocaInst &I) {
+SizeOffsetAPInt ObjectSizeOffsetVisitor::visitAllocaInst(AllocaInst &I) {
TypeSize ElemSize = DL.getTypeAllocSize(I.getAllocatedType());
if (ElemSize.isScalable() && Options.EvalMode != ObjectSizeOpts::Mode::Min)
- return unknown();
+ return ObjectSizeOffsetVisitor::unknown;
APInt Size(IntTyBits, ElemSize.getKnownMinValue());
if (!I.isArrayAllocation())
- return std::make_pair(align(Size, I.getAlign()), Zero);
+ return SizeOffsetAPInt(align(Size, I.getAlign()), Zero);
Value *ArraySize = I.getArraySize();
if (const ConstantInt *C = dyn_cast<ConstantInt>(ArraySize)) {
APInt NumElems = C->getValue();
if (!CheckedZextOrTrunc(NumElems))
- return unknown();
+ return ObjectSizeOffsetVisitor::unknown;
bool Overflow;
Size = Size.umul_ov(NumElems, Overflow);
- return Overflow ? unknown()
- : std::make_pair(align(Size, I.getAlign()), Zero);
+ return Overflow ? ObjectSizeOffsetVisitor::unknown
+ : SizeOffsetAPInt(align(Size, I.getAlign()), Zero);
}
- return unknown();
+ return ObjectSizeOffsetVisitor::unknown;
}
-SizeOffsetType ObjectSizeOffsetVisitor::visitArgument(Argument &A) {
+SizeOffsetAPInt ObjectSizeOffsetVisitor::visitArgument(Argument &A) {
Type *MemoryTy = A.getPointeeInMemoryValueType();
// No interprocedural analysis is done at the moment.
if (!MemoryTy|| !MemoryTy->isSized()) {
++ObjectVisitorArgument;
- return unknown();
+ return ObjectSizeOffsetVisitor::unknown;
}
APInt Size(IntTyBits, DL.getTypeAllocSize(MemoryTy));
- return std::make_pair(align(Size, A.getParamAlign()), Zero);
+ return SizeOffsetAPInt(align(Size, A.getParamAlign()), Zero);
}
-SizeOffsetType ObjectSizeOffsetVisitor::visitCallBase(CallBase &CB) {
+SizeOffsetAPInt ObjectSizeOffsetVisitor::visitCallBase(CallBase &CB) {
if (std::optional<APInt> Size = getAllocSize(&CB, TLI))
- return std::make_pair(*Size, Zero);
- return unknown();
+ return SizeOffsetAPInt(*Size, Zero);
+ return ObjectSizeOffsetVisitor::unknown;
}
-SizeOffsetType
-ObjectSizeOffsetVisitor::visitConstantPointerNull(ConstantPointerNull& CPN) {
+SizeOffsetAPInt
+ObjectSizeOffsetVisitor::visitConstantPointerNull(ConstantPointerNull &CPN) {
// If null is unknown, there's nothing we can do. Additionally, non-zero
// address spaces can make use of null, so we don't presume to know anything
// about that.
@@ -825,45 +829,46 @@ ObjectSizeOffsetVisitor::visitConstantPointerNull(ConstantPointerNull& CPN) {
// them on the floor, but it's unclear what we should do when a NULL from
// addrspace(1) gets casted to addrspace(0) (or vice-versa).
if (Options.NullIsUnknownSize || CPN.getType()->getAddressSpace())
- return unknown();
- return std::make_pair(Zero, Zero);
+ return ObjectSizeOffsetVisitor::unknown;
+ return SizeOffsetAPInt(Zero, Zero);
}
-SizeOffsetType
-ObjectSizeOffsetVisitor::visitExtractElementInst(ExtractElementInst&) {
- return unknown();
+SizeOffsetAPInt
+ObjectSizeOffsetVisitor::visitExtractElementInst(ExtractElementInst &) {
+ return ObjectSizeOffsetVisitor::unknown;
}
-SizeOffsetType
-ObjectSizeOffsetVisitor::visitExtractValueInst(ExtractValueInst&) {
+Size...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/76882
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