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-rw-r--r--include/llvm/Analysis/ScalarEvolution.h18
-rw-r--r--include/llvm/Analysis/ScalarEvolutionExpressions.h2
-rw-r--r--lib/Analysis/ConstantFolding.cpp38
-rw-r--r--lib/Analysis/ScalarEvolution.cpp94
-rw-r--r--lib/Analysis/ScalarEvolutionExpander.cpp6
-rw-r--r--lib/VMCore/ConstantFold.cpp193
-rw-r--r--test/Other/constant-fold-gep.ll349
-rw-r--r--test/Transforms/InstCombine/getelementptr.ll2
8 files changed, 599 insertions, 103 deletions
diff --git a/include/llvm/Analysis/ScalarEvolution.h b/include/llvm/Analysis/ScalarEvolution.h
index e281971bbd..315b782baa 100644
--- a/include/llvm/Analysis/ScalarEvolution.h
+++ b/include/llvm/Analysis/ScalarEvolution.h
@@ -452,11 +452,25 @@ namespace llvm {
const SCEV *getUMaxExpr(SmallVectorImpl<const SCEV *> &Operands);
const SCEV *getSMinExpr(const SCEV *LHS, const SCEV *RHS);
const SCEV *getUMinExpr(const SCEV *LHS, const SCEV *RHS);
- const SCEV *getFieldOffsetExpr(const StructType *STy, unsigned FieldNo);
- const SCEV *getAllocSizeExpr(const Type *AllocTy);
const SCEV *getUnknown(Value *V);
const SCEV *getCouldNotCompute();
+ /// getSizeOfExpr - Return an expression for sizeof on the given type.
+ ///
+ const SCEV *getSizeOfExpr(const Type *AllocTy);
+
+ /// getSizeOfExpr - Return an expression for alignof on the given type.
+ ///
+ const SCEV *getAlignOfExpr(const Type *AllocTy);
+
+ /// getSizeOfExpr - Return an expression for offsetof on the given field.
+ ///
+ const SCEV *getOffsetOfExpr(const StructType *STy, unsigned FieldNo);
+
+ /// getSizeOfExpr - Return an expression for offsetof on the given field.
+ ///
+ const SCEV *getOffsetOfExpr(const Type *CTy, Constant *FieldNo);
+
/// getNegativeSCEV - Return the SCEV object corresponding to -V.
///
const SCEV *getNegativeSCEV(const SCEV *V);
diff --git a/include/llvm/Analysis/ScalarEvolutionExpressions.h b/include/llvm/Analysis/ScalarEvolutionExpressions.h
index 5b93458f11..79d4c63943 100644
--- a/include/llvm/Analysis/ScalarEvolutionExpressions.h
+++ b/include/llvm/Analysis/ScalarEvolutionExpressions.h
@@ -534,7 +534,7 @@ namespace llvm {
/// where it isn't absolutely required for these to succeed.
bool isSizeOf(const Type *&AllocTy) const;
bool isAlignOf(const Type *&AllocTy) const;
- bool isOffsetOf(const StructType *&STy, Constant *&FieldNo) const;
+ bool isOffsetOf(const Type *&STy, Constant *&FieldNo) const;
virtual bool isLoopInvariant(const Loop *L) const;
virtual bool hasComputableLoopEvolution(const Loop *QL) const {
diff --git a/lib/Analysis/ConstantFolding.cpp b/lib/Analysis/ConstantFolding.cpp
index 4ae8859a25..b8e84014bc 100644
--- a/lib/Analysis/ConstantFolding.cpp
+++ b/lib/Analysis/ConstantFolding.cpp
@@ -517,6 +517,42 @@ static Constant *SymbolicallyEvaluateBinop(unsigned Opc, Constant *Op0,
return 0;
}
+/// CastGEPIndices - If array indices are not pointer-sized integers,
+/// explicitly cast them so that they aren't implicitly casted by the
+/// getelementptr.
+static Constant *CastGEPIndices(Constant *const *Ops, unsigned NumOps,
+ const Type *ResultTy,
+ const TargetData *TD) {
+ if (!TD) return 0;
+ const Type *IntPtrTy = TD->getIntPtrType(ResultTy->getContext());
+
+ bool Any = false;
+ SmallVector<Constant*, 32> NewIdxs;
+ for (unsigned i = 1; i != NumOps; ++i) {
+ if ((i == 1 ||
+ !isa<StructType>(GetElementPtrInst::getIndexedType(Ops[0]->getType(),
+ reinterpret_cast<Value *const *>(Ops+1),
+ i-1))) &&
+ Ops[i]->getType() != IntPtrTy) {
+ Any = true;
+ NewIdxs.push_back(ConstantExpr::getCast(CastInst::getCastOpcode(Ops[i],
+ true,
+ IntPtrTy,
+ true),
+ Ops[i], IntPtrTy));
+ } else
+ NewIdxs.push_back(Ops[i]);
+ }
+ if (!Any) return 0;
+
+ Constant *C =
+ ConstantExpr::getGetElementPtr(Ops[0], &NewIdxs[0], NewIdxs.size());
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
+ if (Constant *Folded = ConstantFoldConstantExpression(CE, TD))
+ C = Folded;
+ return C;
+}
+
/// SymbolicallyEvaluateGEP - If we can symbolically evaluate the specified GEP
/// constant expression, do so.
static Constant *SymbolicallyEvaluateGEP(Constant *const *Ops, unsigned NumOps,
@@ -810,6 +846,8 @@ Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, const Type *DestTy,
case Instruction::ShuffleVector:
return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
case Instruction::GetElementPtr:
+ if (Constant *C = CastGEPIndices(Ops, NumOps, DestTy, TD))
+ return C;
if (Constant *C = SymbolicallyEvaluateGEP(Ops, NumOps, DestTy, TD))
return C;
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index f19e153e0d..8d5855986e 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -347,26 +347,6 @@ const Type *SCEVUnknown::getType() const {
return V->getType();
}
-bool SCEVUnknown::isOffsetOf(const StructType *&STy, Constant *&FieldNo) const {
- if (ConstantExpr *VCE = dyn_cast<ConstantExpr>(V))
- if (VCE->getOpcode() == Instruction::PtrToInt)
- if (ConstantExpr *CE = dyn_cast<ConstantExpr>(VCE->getOperand(0)))
- if (CE->getOpcode() == Instruction::GetElementPtr)
- if (CE->getOperand(0)->isNullValue()) {
- const Type *Ty =
- cast<PointerType>(CE->getOperand(0)->getType())->getElementType();
- if (const StructType *StructTy = dyn_cast<StructType>(Ty))
- if (CE->getNumOperands() == 3 &&
- CE->getOperand(1)->isNullValue()) {
- STy = StructTy;
- FieldNo = CE->getOperand(2);
- return true;
- }
- }
-
- return false;
-}
-
bool SCEVUnknown::isSizeOf(const Type *&AllocTy) const {
if (ConstantExpr *VCE = dyn_cast<ConstantExpr>(V))
if (VCE->getOpcode() == Instruction::PtrToInt)
@@ -395,7 +375,8 @@ bool SCEVUnknown::isAlignOf(const Type *&AllocTy) const {
const Type *Ty =
cast<PointerType>(CE->getOperand(0)->getType())->getElementType();
if (const StructType *STy = dyn_cast<StructType>(Ty))
- if (CE->getNumOperands() == 3 &&
+ if (!STy->isPacked() &&
+ CE->getNumOperands() == 3 &&
CE->getOperand(1)->isNullValue()) {
if (ConstantInt *CI = dyn_cast<ConstantInt>(CE->getOperand(2)))
if (CI->isOne() &&
@@ -410,6 +391,28 @@ bool SCEVUnknown::isAlignOf(const Type *&AllocTy) const {
return false;
}
+bool SCEVUnknown::isOffsetOf(const Type *&CTy, Constant *&FieldNo) const {
+ if (ConstantExpr *VCE = dyn_cast<ConstantExpr>(V))
+ if (VCE->getOpcode() == Instruction::PtrToInt)
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(VCE->getOperand(0)))
+ if (CE->getOpcode() == Instruction::GetElementPtr &&
+ CE->getNumOperands() == 3 &&
+ CE->getOperand(0)->isNullValue() &&
+ CE->getOperand(1)->isNullValue()) {
+ const Type *Ty =
+ cast<PointerType>(CE->getOperand(0)->getType())->getElementType();
+ // Ignore vector types here so that ScalarEvolutionExpander doesn't
+ // emit getelementptrs that index into vectors.
+ if (isa<StructType>(Ty) || isa<ArrayType>(Ty)) {
+ CTy = Ty;
+ FieldNo = CE->getOperand(2);
+ return true;
+ }
+ }
+
+ return false;
+}
+
void SCEVUnknown::print(raw_ostream &OS) const {
const Type *AllocTy;
if (isSizeOf(AllocTy)) {
@@ -421,10 +424,10 @@ void SCEVUnknown::print(raw_ostream &OS) const {
return;
}
- const StructType *STy;
+ const Type *CTy;
Constant *FieldNo;
- if (isOffsetOf(STy, FieldNo)) {
- OS << "offsetof(" << *STy << ", ";
+ if (isOffsetOf(CTy, FieldNo)) {
+ OS << "offsetof(" << *CTy << ", ";
WriteAsOperand(OS, FieldNo, false);
OS << ")";
return;
@@ -2231,8 +2234,24 @@ const SCEV *ScalarEvolution::getUMinExpr(const SCEV *LHS,
return getNotSCEV(getUMaxExpr(getNotSCEV(LHS), getNotSCEV(RHS)));
}
-const SCEV *ScalarEvolution::getFieldOffsetExpr(const StructType *STy,
- unsigned FieldNo) {
+const SCEV *ScalarEvolution::getSizeOfExpr(const Type *AllocTy) {
+ Constant *C = ConstantExpr::getSizeOf(AllocTy);
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
+ C = ConstantFoldConstantExpression(CE, TD);
+ const Type *Ty = getEffectiveSCEVType(PointerType::getUnqual(AllocTy));
+ return getTruncateOrZeroExtend(getSCEV(C), Ty);
+}
+
+const SCEV *ScalarEvolution::getAlignOfExpr(const Type *AllocTy) {
+ Constant *C = ConstantExpr::getAlignOf(AllocTy);
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
+ C = ConstantFoldConstantExpression(CE, TD);
+ const Type *Ty = getEffectiveSCEVType(PointerType::getUnqual(AllocTy));
+ return getTruncateOrZeroExtend(getSCEV(C), Ty);
+}
+
+const SCEV *ScalarEvolution::getOffsetOfExpr(const StructType *STy,
+ unsigned FieldNo) {
Constant *C = ConstantExpr::getOffsetOf(STy, FieldNo);
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
C = ConstantFoldConstantExpression(CE, TD);
@@ -2240,11 +2259,12 @@ const SCEV *ScalarEvolution::getFieldOffsetExpr(const StructType *STy,
return getTruncateOrZeroExtend(getSCEV(C), Ty);
}
-const SCEV *ScalarEvolution::getAllocSizeExpr(const Type *AllocTy) {
- Constant *C = ConstantExpr::getSizeOf(AllocTy);
+const SCEV *ScalarEvolution::getOffsetOfExpr(const Type *CTy,
+ Constant *FieldNo) {
+ Constant *C = ConstantExpr::getOffsetOf(CTy, FieldNo);
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
C = ConstantFoldConstantExpression(CE, TD);
- const Type *Ty = getEffectiveSCEVType(PointerType::getUnqual(AllocTy));
+ const Type *Ty = getEffectiveSCEVType(PointerType::getUnqual(CTy));
return getTruncateOrZeroExtend(getSCEV(C), Ty);
}
@@ -2695,7 +2715,7 @@ const SCEV *ScalarEvolution::createNodeForGEP(GEPOperator *GEP) {
// For a struct, add the member offset.
unsigned FieldNo = cast<ConstantInt>(Index)->getZExtValue();
TotalOffset = getAddExpr(TotalOffset,
- getFieldOffsetExpr(STy, FieldNo),
+ getOffsetOfExpr(STy, FieldNo),
/*HasNUW=*/false, /*HasNSW=*/InBounds);
} else {
// For an array, add the element offset, explicitly scaled.
@@ -2704,7 +2724,7 @@ const SCEV *ScalarEvolution::createNodeForGEP(GEPOperator *GEP) {
// Getelementptr indicies are signed.
LocalOffset = getTruncateOrSignExtend(LocalOffset, IntPtrTy);
// Lower "inbounds" GEPs to NSW arithmetic.
- LocalOffset = getMulExpr(LocalOffset, getAllocSizeExpr(*GTI),
+ LocalOffset = getMulExpr(LocalOffset, getSizeOfExpr(*GTI),
/*HasNUW=*/false, /*HasNSW=*/InBounds);
TotalOffset = getAddExpr(TotalOffset, LocalOffset,
/*HasNUW=*/false, /*HasNSW=*/InBounds);
@@ -3197,7 +3217,7 @@ const SCEV *ScalarEvolution::createSCEV(Value *V) {
case Instruction::Shl:
// Turn shift left of a constant amount into a multiply.
if (ConstantInt *SA = dyn_cast<ConstantInt>(U->getOperand(1))) {
- uint32_t BitWidth = cast<IntegerType>(V->getType())->getBitWidth();
+ uint32_t BitWidth = cast<IntegerType>(U->getType())->getBitWidth();
Constant *X = ConstantInt::get(getContext(),
APInt(BitWidth, 1).shl(SA->getLimitedValue(BitWidth)));
return getMulExpr(getSCEV(U->getOperand(0)), getSCEV(X));
@@ -3207,7 +3227,7 @@ const SCEV *ScalarEvolution::createSCEV(Value *V) {
case Instruction::LShr:
// Turn logical shift right of a constant into a unsigned divide.
if (ConstantInt *SA = dyn_cast<ConstantInt>(U->getOperand(1))) {
- uint32_t BitWidth = cast<IntegerType>(V->getType())->getBitWidth();
+ uint32_t BitWidth = cast<IntegerType>(U->getType())->getBitWidth();
Constant *X = ConstantInt::get(getContext(),
APInt(BitWidth, 1).shl(SA->getLimitedValue(BitWidth)));
return getUDivExpr(getSCEV(U->getOperand(0)), getSCEV(X));
@@ -3248,10 +3268,10 @@ const SCEV *ScalarEvolution::createSCEV(Value *V) {
return getSCEV(U->getOperand(0));
break;
- // It's tempting to handle inttoptr and ptrtoint, however this can
- // lead to pointer expressions which cannot be expanded to GEPs
- // (because they may overflow). For now, the only pointer-typed
- // expressions we handle are GEPs and address literals.
+ // It's tempting to handle inttoptr and ptrtoint as no-ops, however this can
+ // lead to pointer expressions which cannot safely be expanded to GEPs,
+ // because ScalarEvolution doesn't respect the GEP aliasing rules when
+ // simplifying integer expressions.
case Instruction::GetElementPtr:
return createNodeForGEP(cast<GEPOperator>(U));
diff --git a/lib/Analysis/ScalarEvolutionExpander.cpp b/lib/Analysis/ScalarEvolutionExpander.cpp
index 07196fdf57..4310e3ccfa 100644
--- a/lib/Analysis/ScalarEvolutionExpander.cpp
+++ b/lib/Analysis/ScalarEvolutionExpander.cpp
@@ -369,7 +369,7 @@ Value *SCEVExpander::expandAddToGEP(const SCEV *const *op_begin,
// array indexing.
SmallVector<const SCEV *, 8> ScaledOps;
if (ElTy->isSized()) {
- const SCEV *ElSize = SE.getAllocSizeExpr(ElTy);
+ const SCEV *ElSize = SE.getSizeOfExpr(ElTy);
if (!ElSize->isZero()) {
SmallVector<const SCEV *, 8> NewOps;
for (unsigned i = 0, e = Ops.size(); i != e; ++i) {
@@ -433,9 +433,9 @@ Value *SCEVExpander::expandAddToGEP(const SCEV *const *op_begin,
// appropriate struct type.
for (unsigned i = 0, e = Ops.size(); i != e; ++i)
if (const SCEVUnknown *U = dyn_cast<SCEVUnknown>(Ops[i])) {
- const StructType *StructTy;
+ const Type *CTy;
Constant *FieldNo;
- if (U->isOffsetOf(StructTy, FieldNo) && StructTy == STy) {
+ if (U->isOffsetOf(CTy, FieldNo) && CTy == STy) {
GepIndices.push_back(FieldNo);
ElTy =
STy->getTypeAtIndex(cast<ConstantInt>(FieldNo)->getZExtValue());
diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp
index 40061ee3d7..c22c3e975b 100644
--- a/lib/VMCore/ConstantFold.cpp
+++ b/lib/VMCore/ConstantFold.cpp
@@ -323,6 +323,116 @@ static Constant *ExtractConstantBytes(Constant *C, unsigned ByteStart,
}
}
+/// getFoldedSizeOf - Return a ConstantExpr with type DestTy for sizeof
+/// on Ty, with any known factors factored out. If Folded is false,
+/// return null if no factoring was possible, to avoid endlessly
+/// bouncing an unfoldable expression back into the top-level folder.
+///
+static Constant *getFoldedSizeOf(const Type *Ty, const Type *DestTy,
+ bool Folded) {
+ if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
+ Constant *N = ConstantInt::get(DestTy, ATy->getNumElements());
+ Constant *E = getFoldedSizeOf(ATy->getElementType(), DestTy, true);
+ return ConstantExpr::getNUWMul(E, N);
+ }
+ if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) {
+ Constant *N = ConstantInt::get(DestTy, VTy->getNumElements());
+ Constant *E = getFoldedSizeOf(VTy->getElementType(), DestTy, true);
+ return ConstantExpr::getNUWMul(E, N);
+ }
+ if (const StructType *STy = dyn_cast<StructType>(Ty))
+ if (!STy->isPacked()) {
+ unsigned NumElems = STy->getNumElements();
+ // An empty struct has size zero.
+ if (NumElems == 0)
+ return ConstantExpr::getNullValue(DestTy);
+ // Check for a struct with all members having the same type.
+ const Type *MemberTy = STy->getElementType(0);
+ bool AllSame = true;
+ for (unsigned i = 1; i != NumElems; ++i)
+ if (MemberTy != STy->getElementType(i)) {
+ AllSame = false;
+ break;
+ }
+ if (AllSame) {
+ Constant *N = ConstantInt::get(DestTy, NumElems);
+ Constant *E = getFoldedSizeOf(MemberTy, DestTy, true);
+ return ConstantExpr::getNUWMul(E, N);
+ }
+ }
+
+ // If there's no interesting folding happening, bail so that we don't create
+ // a constant that looks like it needs folding but really doesn't.
+ if (!Folded)
+ return 0;
+
+ // Base case: Get a regular sizeof expression.
+ Constant *C = ConstantExpr::getSizeOf(Ty);
+ C = ConstantExpr::getCast(CastInst::getCastOpcode(C, false,
+ DestTy, false),
+ C, DestTy);
+ return C;
+}
+
+/// getFoldedOffsetOf - Return a ConstantExpr with type DestTy for offsetof
+/// on Ty and FieldNo, with any known factors factored out. If Folded is false,
+/// return null if no factoring was possible, to avoid endlessly
+/// bouncing an unfoldable expression back into the top-level folder.
+///
+static Constant *getFoldedOffsetOf(const Type *Ty, Constant *FieldNo,
+ const Type *DestTy,
+ bool Folded) {
+ if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
+ Constant *N = ConstantExpr::getCast(CastInst::getCastOpcode(FieldNo, false,
+ DestTy, false),
+ FieldNo, DestTy);
+ Constant *E = getFoldedSizeOf(ATy->getElementType(), DestTy, true);
+ return ConstantExpr::getNUWMul(E, N);
+ }
+ if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) {
+ Constant *N = ConstantExpr::getCast(CastInst::getCastOpcode(FieldNo, false,
+ DestTy, false),
+ FieldNo, DestTy);
+ Constant *E = getFoldedSizeOf(VTy->getElementType(), DestTy, true);
+ return ConstantExpr::getNUWMul(E, N);
+ }
+ if (const StructType *STy = dyn_cast<StructType>(Ty))
+ if (!STy->isPacked()) {
+ unsigned NumElems = STy->getNumElements();
+ // An empty struct has no members.
+ if (NumElems == 0)
+ return 0;
+ // Check for a struct with all members having the same type.
+ const Type *MemberTy = STy->getElementType(0);
+ bool AllSame = true;
+ for (unsigned i = 1; i != NumElems; ++i)
+ if (MemberTy != STy->getElementType(i)) {
+ AllSame = false;
+ break;
+ }
+ if (AllSame) {
+ Constant *N = ConstantExpr::getCast(CastInst::getCastOpcode(FieldNo,
+ false,
+ DestTy,
+ false),
+ FieldNo, DestTy);
+ Constant *E = getFoldedSizeOf(MemberTy, DestTy, true);
+ return ConstantExpr::getNUWMul(E, N);
+ }
+ }
+
+ // If there's no interesting folding happening, bail so that we don't create
+ // a constant that looks like it needs folding but really doesn't.
+ if (!Folded)
+ return 0;
+
+ // Base case: Get a regular offsetof expression.
+ Constant *C = ConstantExpr::getOffsetOf(Ty, FieldNo);
+ C = ConstantExpr::getCast(CastInst::getCastOpcode(C, false,
+ DestTy, false),
+ C, DestTy);
+ return C;
+}
Constant *llvm::ConstantFoldCastInstruction(LLVMContext &Context,
unsigned opc, Constant *V,
@@ -418,33 +528,59 @@ Constant *llvm::ConstantFoldCastInstruction(LLVMContext &Context,
// Is it a null pointer value?
if (V->isNullValue())
return ConstantInt::get(DestTy, 0);
- // If this is a sizeof of an array or vector, pull out a multiplication
- // by the element size to expose it to subsequent folding.
+ // If this is a sizeof-like expression, pull out multiplications by
+ // known factors to expose them to subsequent folding. If it's an
+ // alignof-like expression, factor out known factors.
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
if (CE->getOpcode() == Instruction::GetElementPtr &&
- CE->getNumOperands() == 2 &&
- CE->getOperand(0)->isNullValue())
- if (ConstantInt *CI = dyn_cast<ConstantInt>(CE->getOperand(1)))
- if (CI->isOne()) {
- const Type *Ty =
- cast<PointerType>(CE->getOperand(0)->getType())->getElementType();
- if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
- Constant *N = ConstantInt::get(DestTy, ATy->getNumElements());
- Constant *E = ConstantExpr::getSizeOf(ATy->getElementType());
- E = ConstantExpr::getCast(CastInst::getCastOpcode(E, false,
+ CE->getOperand(0)->isNullValue()) {
+ const Type *Ty =
+ cast<PointerType>(CE->getOperand(0)->getType())->getElementType();
+ if (CE->getNumOperands() == 2) {
+ // Handle a sizeof-like expression.
+ Constant *Idx = CE->getOperand(1);
+ bool isOne = isa<ConstantInt>(Idx) && cast<ConstantInt>(Idx)->isOne();
+ if (Constant *C = getFoldedSizeOf(Ty, DestTy, !isOne)) {
+ Idx = ConstantExpr::getCast(CastInst::getCastOpcode(Idx, true,
DestTy, false),
- E, DestTy);
- return ConstantExpr::getMul(N, E);
- }
- if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) {
- Constant *N = ConstantInt::get(DestTy, VTy->getNumElements());
- Constant *E = ConstantExpr::getSizeOf(VTy->getElementType());
- E = ConstantExpr::getCast(CastInst::getCastOpcode(E, false,
- DestTy, false),
- E, DestTy);
- return ConstantExpr::getMul(N, E);
+ Idx, DestTy);
+ return ConstantExpr::getMul(C, Idx);
+ }
+ } else if (CE->getNumOperands() == 3 &&
+ CE->getOperand(1)->isNullValue()) {
+ // Handle an alignof-like expression.
+ if (const StructType *STy = dyn_cast<StructType>(Ty))
+ if (!STy->isPacked()) {
+ ConstantInt *CI = cast<ConstantInt>(CE->getOperand(2));
+ if (CI->isOne() &&
+ STy->getNumElements() == 2 &&
+ STy->getElementType(0)->isInteger(1)) {
+ // The alignment of an array is equal to the alignment of the
+ // array element. Note that this is not always true for vectors.
+ if (const ArrayType *ATy =
+ dyn_cast<ArrayType>(STy->getElementType(1))) {
+ Constant *C = ConstantExpr::getAlignOf(ATy->getElementType());
+ C = ConstantExpr::getCast(CastInst::getCastOpcode(C, false,
+ DestTy,
+ false),
+ C, DestTy);
+ return C;
+ }
+ // Packed structs always have an alignment of 1.
+ if (const StructType *InnerSTy =
+ dyn_cast<StructType>(STy->getElementType(1)))
+ if (InnerSTy->isPacked())
+ return ConstantInt::get(DestTy, 1);
+ }
}
+ // Handle an offsetof-like expression.
+ if (isa<StructType>(Ty) || isa<ArrayType>(Ty) || isa<VectorType>(Ty)){
+ if (Constant *C = getFoldedOffsetOf(Ty, CE->getOperand(2),
+ DestTy, false))
+ return C;
}
+ }
+ }
// Other pointer types cannot be casted
return 0;
case Instruction::UIToFP:
@@ -1156,10 +1292,19 @@ Constant *llvm::ConstantFoldBinaryInstruction(LLVMContext &Context,
}
}
- if (isa<ConstantExpr>(C1)) {
+ if (ConstantExpr *CE1 = dyn_cast<ConstantExpr>(C1)) {
// There are many possible foldings we could do here. We should probably
// at least fold add of a pointer with an integer into the appropriate
// getelementptr. This will improve alias analysis a bit.
+
+ // Given ((a + b) + c), if (b + c) folds to something interesting, return
+ // (a + (b + c)).
+ if (Instruction::isAssociative(Opcode, C1->getType()) &&
+ CE1->getOpcode() == Opcode) {
+ Constant *T = ConstantExpr::get(Opcode, CE1->getOperand(1), C2);
+ if (!isa<ConstantExpr>(T) || cast<ConstantExpr>(T)->getOpcode() != Opcode)
+ return ConstantExpr::get(Opcode, CE1->getOperand(0), T);
+ }
} else if (isa<ConstantExpr>(C2)) {
// If C2 is a constant expr and C1 isn't, flop them around and fold the
// other way if possible.
@@ -2004,7 +2149,7 @@ Constant *llvm::ConstantFoldGetElementPtr(LLVMContext &Context,
}
// Implement folding of:
- // int* getelementptr ([2 x int]* cast ([3 x int]* %X to [2 x int]*),
+ // int* getelementptr ([2 x int]* bitcast ([3 x int]* %X to [2 x int]*),
// long 0, long 0)
// To: int* getelementptr ([3 x int]* %X, long 0, long 0)
//
diff --git a/test/Other/constant-fold-gep.ll b/test/Other/constant-fold-gep.ll
index 513918d58f..bb93dc761c 100644
--- a/test/Other/constant-fold-gep.ll
+++ b/test/Other/constant-fold-gep.ll
@@ -1,9 +1,32 @@
+; "PLAIN" - No optimizations. This tests the target-independent
+; constant folder.
; RUN: opt -S -o - < %s | FileCheck --check-prefix=PLAIN %s
+
+; "OPT" - Optimizations but no targetdata. This tests target-independent
+; folding in the optimizers.
; RUN: opt -S -o - -instcombine -globalopt < %s | FileCheck --check-prefix=OPT %s
+; "TO" - Optimizations and targetdata. This tests target-dependent
+; folding in the optimizers.
+; RUN: opt -S -o - -instcombine -globalopt -default-data-layout="e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64" < %s | FileCheck --check-prefix=TO %s
+
+; "SCEV" - ScalarEvolution but no targetdata.
+; RUN: opt -analyze -scalar-evolution < %s | FileCheck --check-prefix=SCEV %s
+
+; ScalarEvolution with targetdata isn't interesting on these testcases
+; because ScalarEvolution doesn't attempt to duplicate all of instcombine's
+; and the constant folders' folding.
+
+; PLAIN: %0 = type { i1, double }
+; PLAIN: %1 = type { double, float, double, double }
+; PLAIN: %2 = type { i64, i64 }
+; OPT: %0 = type { i1, double }
+; OPT: %1 = type { double, float, double, double }
+; OPT: %2 = type { i64, i64 }
+
; The automatic constant folder in opt does not have targetdata access, so
; it can't fold gep arithmetic, in general. However, the constant folder run
-; from instcombine and global opt does, and can.
+; from instcombine and global opt can use targetdata.
; PLAIN: @G8 = global i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1)
; PLAIN: @G1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1)
@@ -11,74 +34,330 @@
; PLAIN: @F1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2)
; PLAIN: @H8 = global i8* getelementptr (i8* null, i32 -1)
; PLAIN: @H1 = global i1* getelementptr (i1* null, i32 -1)
+; OPT: @G8 = global i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1)
+; OPT: @G1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1)
+; OPT: @F8 = global i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2)
+; OPT: @F1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2)
+; OPT: @H8 = global i8* getelementptr (i8* null, i32 -1)
+; OPT: @H1 = global i1* getelementptr (i1* null, i32 -1)
+; TO: @G8 = global i8* null
+; TO: @G1 = global i1* null
+; TO: @F8 = global i8* inttoptr (i64 -1 to i8*)
+; TO: @F1 = global i1* inttoptr (i64 -1 to i1*)
+; TO: @H8 = global i8* inttoptr (i64 -1 to i8*)
+; TO: @H1 = global i1* inttoptr (i64 -1 to i1*)
+
+@G8 = global i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1)
+@G1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1)
+@F8 = global i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2)
+@F1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2)
+@H8 = global i8* getelementptr (i8* inttoptr (i32 0 to i8*), i32 -1)
+@H1 = global i1* getelementptr (i1* inttoptr (i32 0 to i1*), i32 -1)
+
+; The target-independent folder should be able to do some clever
+; simplifications on sizeof, alignof, and offsetof expressions. The
+; target-dependent folder should fold these down to constants.
+
+; PLAIN: @a = constant i64 mul (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2310)
+; PLAIN: @b = constant i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
+; PLAIN: @c = constant i64 mul nuw (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2)
+; PLAIN: @d = constant i64 mul nuw (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 11)
+; PLAIN: @e = constant i64 ptrtoint (double* getelementptr (%1* null, i64 0, i32 2) to i64)
+; PLAIN: @f = constant i64 1
+; OPT: @a = constant i64 mul (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2310)
+; OPT: @b = constant i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
+; OPT: @c = constant i64 mul (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2)
+; OPT: @d = constant i64 mul (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 11)
+; OPT: @e = constant i64 ptrtoint (double* getelementptr (%1* null, i64 0, i32 2) to i64)
+; OPT: @f = constant i64 1
+; TO: @a = constant i64 18480
+; TO: @b = constant i64 8
+; TO: @c = constant i64 16
+; TO: @d = constant i64 88
+; TO: @e = constant i64 16
+; TO: @f = constant i64 1
+
+@a = constant i64 mul (i64 3, i64 mul (i64 ptrtoint ({[7 x double], [7 x double]}* getelementptr ({[7 x double], [7 x double]}* null, i64 11) to i64), i64 5))
+@b = constant i64 ptrtoint ([13 x double]* getelementptr ({i1, [13 x double]}* null, i64 0, i32 1) to i64)
+@c = constant i64 ptrtoint (double* getelementptr ({double, double, double, double}* null, i64 0, i32 2) to i64)
+@d = constant i64 ptrtoint (double* getelementptr ([13 x double]* null, i64 0, i32 11) to i64)
+@e = constant i64 ptrtoint (double* getelementptr ({double, float, double, double}* null, i64 0, i32 2) to i64)
+@f = constant i64 ptrtoint (<{ i16, i128 }>* getelementptr ({i1, <{ i16, i128 }>}* null, i64 0, i32 1) to i64)
+
+; The target-dependent folder should cast GEP indices to integer-sized pointers.
+
+; PLAIN: @M = constant i64* getelementptr (i64* null, i32 1)
+; PLAIN: @N = constant i64* getelementptr (%2* null, i32 0, i32 1)
+; PLAIN: @O = constant i64* getelementptr ([2 x i64]* null, i32 0, i32 1)
+; OPT: @M = constant i64* getelementptr (i64* null, i32 1)
+; OPT: @N = constant i64* getelementptr (%2* null, i32 0, i32 1)
+; OPT: @O = constant i64* getelementptr ([2 x i64]* null, i32 0, i32 1)
+; TO: @M = constant i64* inttoptr (i64 8 to i64*)
+; TO: @N = constant i64* inttoptr (i64 8 to i64*)
+; TO: @O = constant i64* inttoptr (i64 8 to i64*)
+
+@M = constant i64* getelementptr (i64 *null, i32 1)
+@N = constant i64* getelementptr ({ i64, i64 } *null, i32 0, i32 1)
+@O = constant i64* getelementptr ([2 x i64] *null, i32 0, i32 1)
+
+; Duplicate all of the above as function return values rather than
+; global initializers.
+
; PLAIN: define i8* @goo8() nounwind {
-; PLAIN: ret i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1)
+; PLAIN: %t = bitcast i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1) to i8*
+; PLAIN: ret i8* %t
; PLAIN: }
; PLAIN: define i1* @goo1() nounwind {
-; PLAIN: ret i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1)
+; PLAIN: %t = bitcast i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1) to i1*
+; PLAIN: ret i1* %t
; PLAIN: }
; PLAIN: define i8* @foo8() nounwind {
-; PLAIN: ret i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2)
+; PLAIN: %t = bitcast i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2) to i8*
+; PLAIN: ret i8* %t
; PLAIN: }
; PLAIN: define i1* @foo1() nounwind {
-; PLAIN: ret i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2)
+; PLAIN: %t = bitcast i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2) to i1*
+; PLAIN: ret i1* %t
; PLAIN: }
; PLAIN: define i8* @hoo8() nounwind {
-; PLAIN: ret i8* getelementptr (i8* null, i32 -1)
+; PLAIN: %t = bitcast i8* getelementptr (i8* null, i32 -1) to i8*
+; PLAIN: ret i8* %t
; PLAIN: }
; PLAIN: define i1* @hoo1() nounwind {
-; PLAIN: ret i1* getelementptr (i1* null, i32 -1)
+; PLAIN: %t = bitcast i1* getelementptr (i1* null, i32 -1) to i1*
+; PLAIN: ret i1* %t
; PLAIN: }
-
-; OPT: @G8 = global i8* null
-; OPT: @G1 = global i1* null
-; OPT: @F8 = global i8* inttoptr (i64 -1 to i8*)
-; OPT: @F1 = global i1* inttoptr (i64 -1 to i1*)
-; OPT: @H8 = global i8* inttoptr (i64 -1 to i8*)
-; OPT: @H1 = global i1* inttoptr (i64 -1 to i1*)
; OPT: define i8* @goo8() nounwind {
-; OPT: ret i8* null
+; OPT: ret i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1)
; OPT: }
; OPT: define i1* @goo1() nounwind {
-; OPT: ret i1* null
+; OPT: ret i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1)
; OPT: }
; OPT: define i8* @foo8() nounwind {
-; OPT: ret i8* inttoptr (i64 -1 to i8*)
+; OPT: ret i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2)
; OPT: }
; OPT: define i1* @foo1() nounwind {
-; OPT: ret i1* inttoptr (i64 -1 to i1*)
+; OPT: ret i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2)
; OPT: }
; OPT: define i8* @hoo8() nounwind {
-; OPT: ret i8* inttoptr (i64 -1 to i8*)
+; OPT: ret i8* getelementptr (i8* null, i32 -1)
; OPT: }
; OPT: define i1* @hoo1() nounwind {
-; OPT: ret i1* inttoptr (i64 -1 to i1*)
+; OPT: ret i1* getelementptr (i1* null, i32 -1)
; OPT: }
-
-target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64"
-
-@G8 = global i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1)
-@G1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1)
-@F8 = global i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2)
-@F1 = global i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2)
-@H8 = global i8* getelementptr (i8* inttoptr (i32 0 to i8*), i32 -1)
-@H1 = global i1* getelementptr (i1* inttoptr (i32 0 to i1*), i32 -1)
+; TO: define i8* @goo8() nounwind {
+; TO: ret i8* null
+; TO: }
+; TO: define i1* @goo1() nounwind {
+; TO: ret i1* null
+; TO: }
+; TO: define i8* @foo8() nounwind {
+; TO: ret i8* inttoptr (i64 -1 to i8*)
+; TO: }
+; TO: define i1* @foo1() nounwind {
+; TO: ret i1* inttoptr (i64 -1 to i1*)
+; TO: }
+; TO: define i8* @hoo8() nounwind {
+; TO: ret i8* inttoptr (i64 -1 to i8*)
+; TO: }
+; TO: define i1* @hoo1() nounwind {
+; TO: ret i1* inttoptr (i64 -1 to i1*)
+; TO: }
+; SCEV: Classifying expressions for: @goo8
+; SCEV: %t = bitcast i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1) to i8*
+; SCEV: --> ((-1 * sizeof(i8)) + inttoptr (i32 1 to i8*))
+; SCEV: Classifying expressions for: @goo1
+; SCEV: %t = bitcast i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1) to i1*
+; SCEV: --> ((-1 * sizeof(i1)) + inttoptr (i32 1 to i1*))
+; SCEV: Classifying expressions for: @foo8
+; SCEV: %t = bitcast i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2) to i8*
+; SCEV: --> ((-2 * sizeof(i8)) + inttoptr (i32 1 to i8*))
+; SCEV: Classifying expressions for: @foo1
+; SCEV: %t = bitcast i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2) to i1*
+; SCEV: --> ((-2 * sizeof(i1)) + inttoptr (i32 1 to i1*))
+; SCEV: Classifying expressions for: @hoo8
+; SCEV: --> (-1 * sizeof(i8))
+; SCEV: Classifying expressions for: @hoo1
+; SCEV: --> (-1 * sizeof(i1))
define i8* @goo8() nounwind {
- ret i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1)
+ %t = bitcast i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -1) to i8*
+ ret i8* %t
}
define i1* @goo1() nounwind {
- ret i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1)
+ %t = bitcast i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -1) to i1*
+ ret i1* %t
}
define i8* @foo8() nounwind {
- ret i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2)
+ %t = bitcast i8* getelementptr (i8* inttoptr (i32 1 to i8*), i32 -2) to i8*
+ ret i8* %t
}
define i1* @foo1() nounwind {
- ret i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2)
+ %t = bitcast i1* getelementptr (i1* inttoptr (i32 1 to i1*), i32 -2) to i1*
+ ret i1* %t
}
define i8* @hoo8() nounwind {
- ret i8* getelementptr (i8* inttoptr (i32 0 to i8*), i32 -1)
+ %t = bitcast i8* getelementptr (i8* inttoptr (i32 0 to i8*), i32 -1) to i8*
+ ret i8* %t
}
define i1* @hoo1() nounwind {
- ret i1* getelementptr (i1* inttoptr (i32 0 to i1*), i32 -1)
+ %t = bitcast i1* getelementptr (i1* inttoptr (i32 0 to i1*), i32 -1) to i1*
+ ret i1* %t
+}
+
+; PLAIN: define i64 @fa() nounwind {
+; PLAIN: %t = bitcast i64 mul (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2310) to i64
+; PLAIN: ret i64 %t
+; PLAIN: }
+; PLAIN: define i64 @fb() nounwind {
+; PLAIN: %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64) to i64
+; PLAIN: ret i64 %t
+; PLAIN: }
+; PLAIN: define i64 @fc() nounwind {
+; PLAIN: %t = bitcast i64 mul nuw (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2) to i64
+; PLAIN: ret i64 %t
+; PLAIN: }
+; PLAIN: define i64 @fd() nounwind {
+; PLAIN: %t = bitcast i64 mul nuw (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 11) to i64
+; PLAIN: ret i64 %t
+; PLAIN: }
+; PLAIN: define i64 @fe() nounwind {
+; PLAIN: %t = bitcast i64 ptrtoint (double* getelementptr (%1* null, i64 0, i32 2) to i64) to i64
+; PLAIN: ret i64 %t
+; PLAIN: }
+; PLAIN: define i64 @ff() nounwind {
+; PLAIN: %t = bitcast i64 1 to i64
+; PLAIN: ret i64 %t
+; PLAIN: }
+; OPT: define i64 @fa() nounwind {
+; OPT: ret i64 mul (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2310)
+; OPT: }
+; OPT: define i64 @fb() nounwind {
+; OPT: ret i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
+; OPT: }
+; OPT: define i64 @fc() nounwind {
+; OPT: ret i64 mul nuw (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2)
+; OPT: }
+; OPT: define i64 @fd() nounwind {
+; OPT: ret i64 mul nuw (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 11)
+; OPT: }
+; OPT: define i64 @fe() nounwind {
+; OPT: ret i64 ptrtoint (double* getelementptr (%1* null, i64 0, i32 2) to i64)
+; OPT: }
+; OPT: define i64 @ff() nounwind {
+; OPT: ret i64 1
+; OPT: }
+; TO: define i64 @fa() nounwind {
+; TO: ret i64 18480
+; TO: }
+; TO: define i64 @fb() nounwind {
+; TO: ret i64 8
+; TO: }
+; TO: define i64 @fc() nounwind {
+; TO: ret i64 16
+; TO: }
+; TO: define i64 @fd() nounwind {
+; TO: ret i64 88
+; TO: }
+; TO: define i64 @fe() nounwind {
+; TO: ret i64 16
+; TO: }
+; TO: define i64 @ff() nounwind {
+; TO: ret i64 1
+; TO: }
+; SCEV: Classifying expressions for: @fa
+; SCEV: %t = bitcast i64 mul (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2310) to i64
+; SCEV: --> (2310 * sizeof(double))
+; SCEV: Classifying expressions for: @fb
+; SCEV: %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64) to i64
+; SCEV: --> alignof(double)
+; SCEV: Classifying expressions for: @fc
+; SCEV: %t = bitcast i64 mul nuw (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2) to i64
+; SCEV: --> (2 * sizeof(double))
+; SCEV: Classifying expressions for: @fd
+; SCEV: %t = bitcast i64 mul nuw (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 11) to i64
+; SCEV: --> (11 * sizeof(double))
+; SCEV: Classifying expressions for: @fe
+; SCEV: %t = bitcast i64 ptrtoint (double* getelementptr (%1* null, i64 0, i32 2) to i64) to i64
+; SCEV: --> offsetof({ double, float, double, double }, 2)
+; SCEV: Classifying expressions for: @ff
+; SCEV: %t = bitcast i64 1 to i64
+; SCEV: --> 1
+
+define i64 @fa() nounwind {
+ %t = bitcast i64 mul (i64 3, i64 mul (i64 ptrtoint ({[7 x double], [7 x double]}* getelementptr ({[7 x double], [7 x double]}* null, i64 11) to i64), i64 5)) to i64
+ ret i64 %t
+}
+define i64 @fb() nounwind {
+ %t = bitcast i64 ptrtoint ([13 x double]* getelementptr ({i1, [13 x double]}* null, i64 0, i32 1) to i64) to i64
+ ret i64 %t
+}
+define i64 @fc() nounwind {
+ %t = bitcast i64 ptrtoint (double* getelementptr ({double, double, double, double}* null, i64 0, i32 2) to i64) to i64
+ ret i64 %t
+}
+define i64 @fd() nounwind {
+ %t = bitcast i64 ptrtoint (double* getelementptr ([13 x double]* null, i64 0, i32 11) to i64) to i64
+ ret i64 %t
+}
+define i64 @fe() nounwind {
+ %t = bitcast i64 ptrtoint (double* getelementptr ({double, float, double, double}* null, i64 0, i32 2) to i64) to i64
+ ret i64 %t
+}
+define i64 @ff() nounwind {
+ %t = bitcast i64 ptrtoint (<{ i16, i128 }>* getelementptr ({i1, <{ i16, i128 }>}* null, i64 0, i32 1) to i64) to i64
+ ret i64 %t
+}
+
+; PLAIN: define i64* @fM() nounwind {
+; PLAIN: %t = bitcast i64* getelementptr (i64* null, i32 1) to i64*
+; PLAIN: ret i64* %t
+; PLAIN: }
+; PLAIN: define i64* @fN() nounwind {
+; PLAIN: %t = bitcast i64* getelementptr (%2* null, i32 0, i32 1) to i64*
+; PLAIN: ret i64* %t
+; PLAIN: }
+; PLAIN: define i64* @fO() nounwind {
+; PLAIN: %t = bitcast i64* getelementptr ([2 x i64]* null, i32 0, i32 1) to i64*
+; PLAIN: ret i64* %t
+; PLAIN: }
+; OPT: define i64* @fM() nounwind {
+; OPT: ret i64* getelementptr (i64* null, i32 1)
+; OPT: }
+; OPT: define i64* @fN() nounwind {
+; OPT: ret i64* getelementptr (%2* null, i32 0, i32 1)
+; OPT: }
+; OPT: define i64* @fO() nounwind {
+; OPT: ret i64* getelementptr ([2 x i64]* null, i32 0, i32 1)
+; OPT: }
+; TO: define i64* @fM() nounwind {
+; TO: ret i64* inttoptr (i64 8 to i64*)
+; TO: }
+; TO: define i64* @fN() nounwind {
+; TO: ret i64* inttoptr (i64 8 to i64*)
+; TO: }
+; TO: define i64* @fO() nounwind {
+; TO: ret i64* inttoptr (i64 8 to i64*)
+; TO: }
+; SCEV: Classifying expressions for: @fM
+; SCEV: %t = bitcast i64* getelementptr (i64* null, i32 1) to i64*
+; SCEV: --> sizeof(i64)
+; SCEV: Classifying expressions for: @fN
+; SCEV: %t = bitcast i64* getelementptr (%2* null, i32 0, i32 1) to i64*
+; SCEV: --> sizeof(i64)
+; SCEV: Classifying expressions for: @fO
+; SCEV: %t = bitcast i64* getelementptr ([2 x i64]* null, i32 0, i32 1) to i64*
+; SCEV: --> sizeof(i64)
+
+define i64* @fM() nounwind {
+ %t = bitcast i64* getelementptr (i64 *null, i32 1) to i64*
+ ret i64* %t
+}
+define i64* @fN() nounwind {
+ %t = bitcast i64* getelementptr ({ i64, i64 } *null, i32 0, i32 1) to i64*
+ ret i64* %t
+}
+define i64* @fO() nounwind {
+ %t = bitcast i64* getelementptr ([2 x i64] *null, i32 0, i32 1) to i64*
+ ret i64* %t
}
diff --git a/test/Transforms/InstCombine/getelementptr.ll b/test/Transforms/InstCombine/getelementptr.ll
index de325f6402..f0bee4ea2e 100644
--- a/test/Transforms/InstCombine/getelementptr.ll
+++ b/test/Transforms/InstCombine/getelementptr.ll
@@ -246,7 +246,7 @@ bc0:
store i32 0, i32* %tmp53
ret void
; CHECK: @test24
-; CHECK: store i32 0, i32* getelementptr (%"java/lang/StringBuffer"* null, i32 0, i32 1)
+; CHECK: store i32 0, i32* getelementptr (%"java/lang/StringBuffer"* null, i64 0, i32 1)
}
define void @test25() {
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-12 14:12:28 +0000