//
// Also, to supplement the basic VMCore ConstantExpr simplifications,
// this file defines some additional folding routines that can make use of
-// TargetData information. These functions cannot go in VMCore due to library
+// DataLayout information. These functions cannot go in VMCore due to library
// dependency issues.
//
//===----------------------------------------------------------------------===//
#include "llvm/GlobalVariable.h"
#include "llvm/Instructions.h"
#include "llvm/Intrinsics.h"
+#include "llvm/Operator.h"
#include "llvm/Analysis/ValueTracking.h"
-#include "llvm/Target/TargetData.h"
+#include "llvm/DataLayout.h"
+#include "llvm/Target/TargetLibraryInfo.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/Support/ErrorHandling.h"
//===----------------------------------------------------------------------===//
/// FoldBitCast - Constant fold bitcast, symbolically evaluating it with
-/// TargetData. This always returns a non-null constant, but it may be a
+/// DataLayout. This always returns a non-null constant, but it may be a
/// ConstantExpr if unfoldable.
-static Constant *FoldBitCast(Constant *C, const Type *DestTy,
- const TargetData &TD) {
+static Constant *FoldBitCast(Constant *C, Type *DestTy,
+ const DataLayout &TD) {
+ // Catch the obvious splat cases.
+ if (C->isNullValue() && !DestTy->isX86_MMXTy())
+ return Constant::getNullValue(DestTy);
+ if (C->isAllOnesValue() && !DestTy->isX86_MMXTy())
+ return Constant::getAllOnesValue(DestTy);
+
+ // Handle a vector->integer cast.
+ if (IntegerType *IT = dyn_cast<IntegerType>(DestTy)) {
+ ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(C);
+ if (CDV == 0)
+ return ConstantExpr::getBitCast(C, DestTy);
+
+ unsigned NumSrcElts = CDV->getType()->getNumElements();
+
+ Type *SrcEltTy = CDV->getType()->getElementType();
+
+ // If the vector is a vector of floating point, convert it to vector of int
+ // to simplify things.
+ if (SrcEltTy->isFloatingPointTy()) {
+ unsigned FPWidth = SrcEltTy->getPrimitiveSizeInBits();
+ Type *SrcIVTy =
+ VectorType::get(IntegerType::get(C->getContext(), FPWidth), NumSrcElts);
+ // Ask VMCore to do the conversion now that #elts line up.
+ C = ConstantExpr::getBitCast(C, SrcIVTy);
+ CDV = cast<ConstantDataVector>(C);
+ }
+
+ // Now that we know that the input value is a vector of integers, just shift
+ // and insert them into our result.
+ unsigned BitShift = TD.getTypeAllocSizeInBits(SrcEltTy);
+ APInt Result(IT->getBitWidth(), 0);
+ for (unsigned i = 0; i != NumSrcElts; ++i) {
+ Result <<= BitShift;
+ if (TD.isLittleEndian())
+ Result |= CDV->getElementAsInteger(NumSrcElts-i-1);
+ else
+ Result |= CDV->getElementAsInteger(i);
+ }
+
+ return ConstantInt::get(IT, Result);
+ }
- // This only handles casts to vectors currently.
- const VectorType *DestVTy = dyn_cast<VectorType>(DestTy);
+ // The code below only handles casts to vectors currently.
+ VectorType *DestVTy = dyn_cast<VectorType>(DestTy);
if (DestVTy == 0)
return ConstantExpr::getBitCast(C, DestTy);
// vector so the code below can handle it uniformly.
if (isa<ConstantFP>(C) || isa<ConstantInt>(C)) {
Constant *Ops = C; // don't take the address of C!
- return FoldBitCast(ConstantVector::get(&Ops, 1), DestTy, TD);
+ return FoldBitCast(ConstantVector::get(Ops), DestTy, TD);
}
// If this is a bitcast from constant vector -> vector, fold it.
- ConstantVector *CV = dyn_cast<ConstantVector>(C);
- if (CV == 0)
+ if (!isa<ConstantDataVector>(C) && !isa<ConstantVector>(C))
return ConstantExpr::getBitCast(C, DestTy);
// If the element types match, VMCore can fold it.
unsigned NumDstElt = DestVTy->getNumElements();
- unsigned NumSrcElt = CV->getNumOperands();
+ unsigned NumSrcElt = C->getType()->getVectorNumElements();
if (NumDstElt == NumSrcElt)
return ConstantExpr::getBitCast(C, DestTy);
- const Type *SrcEltTy = CV->getType()->getElementType();
- const Type *DstEltTy = DestVTy->getElementType();
+ Type *SrcEltTy = C->getType()->getVectorElementType();
+ Type *DstEltTy = DestVTy->getElementType();
// Otherwise, we're changing the number of elements in a vector, which
// requires endianness information to do the right thing. For example,
if (DstEltTy->isFloatingPointTy()) {
// Fold to an vector of integers with same size as our FP type.
unsigned FPWidth = DstEltTy->getPrimitiveSizeInBits();
- const Type *DestIVTy =
+ Type *DestIVTy =
VectorType::get(IntegerType::get(C->getContext(), FPWidth), NumDstElt);
// Recursively handle this integer conversion, if possible.
C = FoldBitCast(C, DestIVTy, TD);
- if (!C) return ConstantExpr::getBitCast(C, DestTy);
// Finally, VMCore can handle this now that #elts line up.
return ConstantExpr::getBitCast(C, DestTy);
// it to integer first.
if (SrcEltTy->isFloatingPointTy()) {
unsigned FPWidth = SrcEltTy->getPrimitiveSizeInBits();
- const Type *SrcIVTy =
+ Type *SrcIVTy =
VectorType::get(IntegerType::get(C->getContext(), FPWidth), NumSrcElt);
// Ask VMCore to do the conversion now that #elts line up.
C = ConstantExpr::getBitCast(C, SrcIVTy);
- CV = dyn_cast<ConstantVector>(C);
- if (!CV) // If VMCore wasn't able to fold it, bail out.
+ // If VMCore wasn't able to fold it, bail out.
+ if (!isa<ConstantVector>(C) && // FIXME: Remove ConstantVector.
+ !isa<ConstantDataVector>(C))
return C;
}
Constant *Elt = Zero;
unsigned ShiftAmt = isLittleEndian ? 0 : SrcBitSize*(Ratio-1);
for (unsigned j = 0; j != Ratio; ++j) {
- Constant *Src = dyn_cast<ConstantInt>(CV->getOperand(SrcElt++));
+ Constant *Src =dyn_cast<ConstantInt>(C->getAggregateElement(SrcElt++));
if (!Src) // Reject constantexpr elements.
return ConstantExpr::getBitCast(C, DestTy);
}
Result.push_back(Elt);
}
- } else {
- // Handle: bitcast (<2 x i64> <i64 0, i64 1> to <4 x i32>)
- unsigned Ratio = NumDstElt/NumSrcElt;
- unsigned DstBitSize = DstEltTy->getPrimitiveSizeInBits();
+ return ConstantVector::get(Result);
+ }
+
+ // Handle: bitcast (<2 x i64> <i64 0, i64 1> to <4 x i32>)
+ unsigned Ratio = NumDstElt/NumSrcElt;
+ unsigned DstBitSize = DstEltTy->getPrimitiveSizeInBits();
+
+ // Loop over each source value, expanding into multiple results.
+ for (unsigned i = 0; i != NumSrcElt; ++i) {
+ Constant *Src = dyn_cast<ConstantInt>(C->getAggregateElement(i));
+ if (!Src) // Reject constantexpr elements.
+ return ConstantExpr::getBitCast(C, DestTy);
- // Loop over each source value, expanding into multiple results.
- for (unsigned i = 0; i != NumSrcElt; ++i) {
- Constant *Src = dyn_cast<ConstantInt>(CV->getOperand(i));
- if (!Src) // Reject constantexpr elements.
- return ConstantExpr::getBitCast(C, DestTy);
+ unsigned ShiftAmt = isLittleEndian ? 0 : DstBitSize*(Ratio-1);
+ for (unsigned j = 0; j != Ratio; ++j) {
+ // Shift the piece of the value into the right place, depending on
+ // endianness.
+ Constant *Elt = ConstantExpr::getLShr(Src,
+ ConstantInt::get(Src->getType(), ShiftAmt));
+ ShiftAmt += isLittleEndian ? DstBitSize : -DstBitSize;
- unsigned ShiftAmt = isLittleEndian ? 0 : DstBitSize*(Ratio-1);
- for (unsigned j = 0; j != Ratio; ++j) {
- // Shift the piece of the value into the right place, depending on
- // endianness.
- Constant *Elt = ConstantExpr::getLShr(Src,
- ConstantInt::get(Src->getType(), ShiftAmt));
- ShiftAmt += isLittleEndian ? DstBitSize : -DstBitSize;
-
- // Truncate and remember this piece.
- Result.push_back(ConstantExpr::getTrunc(Elt, DstEltTy));
- }
+ // Truncate and remember this piece.
+ Result.push_back(ConstantExpr::getTrunc(Elt, DstEltTy));
}
}
- return ConstantVector::get(Result.data(), Result.size());
+ return ConstantVector::get(Result);
}
/// from a global, return the global and the constant. Because of
/// constantexprs, this function is recursive.
static bool IsConstantOffsetFromGlobal(Constant *C, GlobalValue *&GV,
- int64_t &Offset, const TargetData &TD) {
+ int64_t &Offset, const DataLayout &TD) {
// Trivial case, constant is the global.
if ((GV = dyn_cast<GlobalValue>(C))) {
Offset = 0;
if (!CI) return false; // Index isn't a simple constant?
if (CI->isZero()) continue; // Not adding anything.
- if (const StructType *ST = dyn_cast<StructType>(*GTI)) {
+ if (StructType *ST = dyn_cast<StructType>(*GTI)) {
// N = N + Offset
Offset += TD.getStructLayout(ST)->getElementOffset(CI->getZExtValue());
} else {
- const SequentialType *SQT = cast<SequentialType>(*GTI);
+ SequentialType *SQT = cast<SequentialType>(*GTI);
Offset += TD.getTypeAllocSize(SQT->getElementType())*CI->getSExtValue();
}
}
/// the CurPtr buffer. TD is the target data.
static bool ReadDataFromGlobal(Constant *C, uint64_t ByteOffset,
unsigned char *CurPtr, unsigned BytesLeft,
- const TargetData &TD) {
+ const DataLayout &TD) {
assert(ByteOffset <= TD.getTypeAllocSize(C->getType()) &&
"Out of range access");
}
return false;
}
-
+
if (ConstantStruct *CS = dyn_cast<ConstantStruct>(C)) {
const StructLayout *SL = TD.getStructLayout(CS->getType());
unsigned Index = SL->getElementContainingOffset(ByteOffset);
// not reached.
}
- if (ConstantArray *CA = dyn_cast<ConstantArray>(C)) {
- uint64_t EltSize = TD.getTypeAllocSize(CA->getType()->getElementType());
+ if (isa<ConstantArray>(C) || isa<ConstantVector>(C) ||
+ isa<ConstantDataSequential>(C)) {
+ Type *EltTy = cast<SequentialType>(C->getType())->getElementType();
+ uint64_t EltSize = TD.getTypeAllocSize(EltTy);
uint64_t Index = ByteOffset / EltSize;
uint64_t Offset = ByteOffset - Index * EltSize;
- for (; Index != CA->getType()->getNumElements(); ++Index) {
- if (!ReadDataFromGlobal(CA->getOperand(Index), Offset, CurPtr,
+ uint64_t NumElts;
+ if (ArrayType *AT = dyn_cast<ArrayType>(C->getType()))
+ NumElts = AT->getNumElements();
+ else
+ NumElts = cast<VectorType>(C->getType())->getNumElements();
+
+ for (; Index != NumElts; ++Index) {
+ if (!ReadDataFromGlobal(C->getAggregateElement(Index), Offset, CurPtr,
BytesLeft, TD))
return false;
- if (EltSize >= BytesLeft)
+
+ uint64_t BytesWritten = EltSize - Offset;
+ assert(BytesWritten <= EltSize && "Not indexing into this element?");
+ if (BytesWritten >= BytesLeft)
return true;
-
+
Offset = 0;
- BytesLeft -= EltSize;
- CurPtr += EltSize;
+ BytesLeft -= BytesWritten;
+ CurPtr += BytesWritten;
}
return true;
}
-
- if (ConstantVector *CV = dyn_cast<ConstantVector>(C)) {
- uint64_t EltSize = TD.getTypeAllocSize(CV->getType()->getElementType());
- uint64_t Index = ByteOffset / EltSize;
- uint64_t Offset = ByteOffset - Index * EltSize;
- for (; Index != CV->getType()->getNumElements(); ++Index) {
- if (!ReadDataFromGlobal(CV->getOperand(Index), Offset, CurPtr,
- BytesLeft, TD))
- return false;
- if (EltSize >= BytesLeft)
- return true;
- Offset = 0;
- BytesLeft -= EltSize;
- CurPtr += EltSize;
- }
- return true;
- }
-
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
- if (CE->getOpcode() == Instruction::IntToPtr) {
- uint64_t PtrSize = TD.getTypeAllocSize(C->getType());
- uint64_t IntSize = TD.getTypeAllocSize(C->getOperand(0)->getType());
-
- if (PtrSize == IntSize)
- return ReadDataFromGlobal(CE->getOperand(0), ByteOffset, CurPtr,
- BytesLeft, TD);
- }
+ if (CE->getOpcode() == Instruction::IntToPtr &&
+ CE->getOperand(0)->getType() == TD.getIntPtrType(CE->getContext()))
+ return ReadDataFromGlobal(CE->getOperand(0), ByteOffset, CurPtr,
+ BytesLeft, TD);
}
// Otherwise, unknown initializer type.
}
static Constant *FoldReinterpretLoadFromConstPtr(Constant *C,
- const TargetData &TD) {
-
const Type *LoadTy = cast<PointerType>(C->getType())->getElementType();
- const IntegerType *IntType = dyn_cast<IntegerType>(LoadTy);
+ const DataLayout &TD) {
+ Type *LoadTy = cast<PointerType>(C->getType())->getElementType();
+ IntegerType *IntType = dyn_cast<IntegerType>(LoadTy);
// If this isn't an integer load we can't fold it directly.
if (!IntType) {
// and then bitcast the result. This can be useful for union cases. Note
// that address spaces don't matter here since we're not going to result in
// an actual new load.
- const Type *MapTy;
+ Type *MapTy;
if (LoadTy->isFloatTy())
MapTy = Type::getInt32PtrTy(C->getContext());
else if (LoadTy->isDoubleTy())
/// produce if it is constant and determinable. If this is not determinable,
/// return null.
Constant *llvm::ConstantFoldLoadFromConstPtr(Constant *C,
- const TargetData *TD) {
+ const DataLayout *TD) {
// First, try the easy cases:
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
if (GV->isConstant() && GV->hasDefinitiveInitializer())
// Instead of loading constant c string, use corresponding integer value
// directly if string length is small enough.
- std::string Str;
- if (TD && GetConstantStringInfo(CE, Str) && !Str.empty()) {
- unsigned StrLen = Str.length();
-
const Type *Ty = cast<PointerType>(CE->getType())->getElementType();
+ StringRef Str;
+ if (TD && getConstantStringInfo(CE, Str) && !Str.empty()) {
+ unsigned StrLen = Str.size();
+ Type *Ty = cast<PointerType>(CE->getType())->getElementType();
unsigned NumBits = Ty->getPrimitiveSizeInBits();
// Replace load with immediate integer if the result is an integer or fp
// value.
if (GlobalVariable *GV =
dyn_cast<GlobalVariable>(GetUnderlyingObject(CE, TD))) {
if (GV->isConstant() && GV->hasDefinitiveInitializer()) {
-
const Type *ResTy = cast<PointerType>(C->getType())->getElementType();
+ Type *ResTy = cast<PointerType>(C->getType())->getElementType();
if (GV->getInitializer()->isNullValue())
return Constant::getNullValue(ResTy);
if (isa<UndefValue>(GV->getInitializer()))
return 0;
}
-static Constant *ConstantFoldLoadInst(const LoadInst *LI, const TargetData *TD){
+static Constant *ConstantFoldLoadInst(const LoadInst *LI, const DataLayout *TD){
if (LI->isVolatile()) return 0;
if (Constant *C = dyn_cast<Constant>(LI->getOperand(0)))
/// these together. If target data info is available, it is provided as TD,
/// otherwise TD is null.
static Constant *SymbolicallyEvaluateBinop(unsigned Opc, Constant *Op0,
- Constant *Op1, const TargetData *TD){
+ Constant *Op1, const DataLayout *TD){
// SROA
// Fold (and 0xffffffff00000000, (shl x, 32)) -> shl.
/// 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) {
+static Constant *CastGEPIndices(ArrayRef<Constant *> Ops,
+ Type *ResultTy, const DataLayout *TD,
+ const TargetLibraryInfo *TLI) {
if (!TD) return 0;
- const Type *IntPtrTy = TD->getIntPtrType(ResultTy->getContext());
+ Type *IntPtrTy = TD->getIntPtrType(ResultTy->getContext());
bool Any = false;
SmallVector<Constant*, 32> NewIdxs;
- for (unsigned i = 1; i != NumOps; ++i) {
+ for (unsigned i = 1, e = Ops.size(); i != e; ++i) {
if ((i == 1 ||
!isa<StructType>(GetElementPtrInst::getIndexedType(Ops[0]->getType(),
- reinterpret_cast<Value *const *>(Ops+1),
- i-1))) &&
+ Ops.slice(1, i-1)))) &&
Ops[i]->getType() != IntPtrTy) {
Any = true;
NewIdxs.push_back(ConstantExpr::getCast(CastInst::getCastOpcode(Ops[i],
if (!Any) return 0;
Constant *C =
- ConstantExpr::getGetElementPtr(Ops[0], &NewIdxs[0], NewIdxs.size());
+ ConstantExpr::getGetElementPtr(Ops[0], NewIdxs);
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
- if (Constant *Folded = ConstantFoldConstantExpression(CE, TD))
+ if (Constant *Folded = ConstantFoldConstantExpression(CE, TD, TLI))
C = Folded;
return C;
}
+/// Strip the pointer casts, but preserve the address space information.
+static Constant* StripPtrCastKeepAS(Constant* Ptr) {
+ assert(Ptr->getType()->isPointerTy() && "Not a pointer type");
+ PointerType *OldPtrTy = cast<PointerType>(Ptr->getType());
+ Ptr = cast<Constant>(Ptr->stripPointerCasts());
+ PointerType *NewPtrTy = cast<PointerType>(Ptr->getType());
+
+ // Preserve the address space number of the pointer.
+ if (NewPtrTy->getAddressSpace() != OldPtrTy->getAddressSpace()) {
+ NewPtrTy = NewPtrTy->getElementType()->getPointerTo(
+ OldPtrTy->getAddressSpace());
+ Ptr = ConstantExpr::getBitCast(Ptr, NewPtrTy);
+ }
+ return Ptr;
+}
+
/// SymbolicallyEvaluateGEP - If we can symbolically evaluate the specified GEP
/// constant expression, do so.
-static Constant *SymbolicallyEvaluateGEP(Constant *const *Ops, unsigned NumOps,
- const Type *ResultTy,
- const TargetData *TD) {
+static Constant *SymbolicallyEvaluateGEP(ArrayRef<Constant *> Ops,
+ Type *ResultTy, const DataLayout *TD,
+ const TargetLibraryInfo *TLI) {
Constant *Ptr = Ops[0];
- if (!TD || !cast<PointerType>(Ptr->getType())->getElementType()->isSized())
+ if (!TD || !cast<PointerType>(Ptr->getType())->getElementType()->isSized() ||
+ !Ptr->getType()->isPointerTy())
return 0;
- const Type *IntPtrTy = TD->getIntPtrType(Ptr->getContext());
+ Type *IntPtrTy = TD->getIntPtrType(Ptr->getContext());
// If this is a constant expr gep that is effectively computing an
// "offsetof", fold it into 'cast int Size to T*' instead of 'gep 0, 0, 12'
- for (unsigned i = 1; i != NumOps; ++i)
+ for (unsigned i = 1, e = Ops.size(); i != e; ++i)
if (!isa<ConstantInt>(Ops[i])) {
// If this is "gep i8* Ptr, (sub 0, V)", fold this as:
// "inttoptr (sub (ptrtoint Ptr), V)"
- if (NumOps == 2 &&
+ if (Ops.size() == 2 &&
cast<PointerType>(ResultTy)->getElementType()->isIntegerTy(8)) {
ConstantExpr *CE = dyn_cast<ConstantExpr>(Ops[1]);
assert((CE == 0 || CE->getType() == IntPtrTy) &&
Res = ConstantExpr::getSub(Res, CE->getOperand(1));
Res = ConstantExpr::getIntToPtr(Res, ResultTy);
if (ConstantExpr *ResCE = dyn_cast<ConstantExpr>(Res))
- Res = ConstantFoldConstantExpression(ResCE, TD);
+ Res = ConstantFoldConstantExpression(ResCE, TD, TLI);
return Res;
}
}
return 0;
}
-
+
unsigned BitWidth = TD->getTypeSizeInBits(IntPtrTy);
- APInt Offset = APInt(BitWidth,
- TD->getIndexedOffset(Ptr->getType(),
- (Value**)Ops+1, NumOps-1));
- Ptr = cast<Constant>(Ptr->stripPointerCasts());
+ APInt Offset =
+ APInt(BitWidth, TD->getIndexedOffset(Ptr->getType(),
+ makeArrayRef((Value *const*)
+ Ops.data() + 1,
+ Ops.size() - 1)));
+ Ptr = StripPtrCastKeepAS(Ptr);
// If this is a GEP of a GEP, fold it all into a single GEP.
while (GEPOperator *GEP = dyn_cast<GEPOperator>(Ptr)) {
Ptr = cast<Constant>(GEP->getOperand(0));
Offset += APInt(BitWidth,
- TD->getIndexedOffset(Ptr->getType(),
- (Value**)NestedOps.data(),
- NestedOps.size()));
- Ptr = cast<Constant>(Ptr->stripPointerCasts());
+ TD->getIndexedOffset(Ptr->getType(), NestedOps));
+ Ptr = StripPtrCastKeepAS(Ptr);
}
// If the base value for this address is a literal integer value, fold the
// we eliminate over-indexing of the notional static type array bounds.
// This makes it easy to determine if the getelementptr is "inbounds".
// Also, this helps GlobalOpt do SROA on GlobalVariables.
- const Type *Ty = Ptr->getType();
+ Type *Ty = Ptr->getType();
+ assert(Ty->isPointerTy() && "Forming regular GEP of non-pointer type");
SmallVector<Constant*, 32> NewIdxs;
do {
- if (const SequentialType *ATy = dyn_cast<SequentialType>(Ty)) {
+ if (SequentialType *ATy = dyn_cast<SequentialType>(Ty)) {
if (ATy->isPointerTy()) {
// The only pointer indexing we'll do is on the first index of the GEP.
if (!NewIdxs.empty())
// Determine which element of the array the offset points into.
APInt ElemSize(BitWidth, TD->getTypeAllocSize(ATy->getElementType()));
- const IntegerType *IntPtrTy = TD->getIntPtrType(Ty->getContext());
+ IntegerType *IntPtrTy = TD->getIntPtrType(Ty->getContext());
if (ElemSize == 0)
// The element size is 0. This may be [0 x Ty]*, so just use a zero
// index for this level and proceed to the next level to see if it can
NewIdxs.push_back(ConstantInt::get(IntPtrTy, NewIdx));
}
Ty = ATy->getElementType();
- } else if (const StructType *STy = dyn_cast<StructType>(Ty)) {
- // Determine which field of the struct the offset points into. The
- // getZExtValue is at least as safe as the StructLayout API because we
- // know the offset is within the struct at this point.
+ } else if (StructType *STy = dyn_cast<StructType>(Ty)) {
+ // If we end up with an offset that isn't valid for this struct type, we
+ // can't re-form this GEP in a regular form, so bail out. The pointer
+ // operand likely went through casts that are necessary to make the GEP
+ // sensible.
const StructLayout &SL = *TD->getStructLayout(STy);
+ if (Offset.uge(SL.getSizeInBytes()))
+ break;
+
+ // Determine which field of the struct the offset points into. The
+ // getZExtValue is fine as we've already ensured that the offset is
+ // within the range representable by the StructLayout API.
unsigned ElIdx = SL.getElementContainingOffset(Offset.getZExtValue());
NewIdxs.push_back(ConstantInt::get(Type::getInt32Ty(Ty->getContext()),
ElIdx));
// Create a GEP.
Constant *C =
- ConstantExpr::getGetElementPtr(Ptr, &NewIdxs[0], NewIdxs.size());
+ ConstantExpr::getGetElementPtr(Ptr, NewIdxs);
assert(cast<PointerType>(C->getType())->getElementType() == Ty &&
"Computed GetElementPtr has unexpected type!");
/// Note that this fails if not all of the operands are constant. Otherwise,
/// this function can only fail when attempting to fold instructions like loads
/// and stores, which have no constant expression form.
-Constant *llvm::ConstantFoldInstruction(Instruction *I, const TargetData *TD) {
+Constant *llvm::ConstantFoldInstruction(Instruction *I,
+ const DataLayout *TD,
+ const TargetLibraryInfo *TLI) {
// Handle PHI nodes quickly here...
if (PHINode *PN = dyn_cast<PHINode>(I)) {
Constant *CommonValue = 0;
// all operands are constants.
if (isa<UndefValue>(Incoming))
continue;
- // If the incoming value is not a constant, or is a different constant to
- // the one we saw previously, then give up.
+ // If the incoming value is not a constant, then give up.
Constant *C = dyn_cast<Constant>(Incoming);
- if (!C || (CommonValue && C != CommonValue))
+ if (!C)
+ return 0;
+ // Fold the PHI's operands.
+ if (ConstantExpr *NewC = dyn_cast<ConstantExpr>(C))
+ C = ConstantFoldConstantExpression(NewC, TD, TLI);
+ // If the incoming value is a different constant to
+ // the one we saw previously, then give up.
+ if (CommonValue && C != CommonValue)
return 0;
CommonValue = C;
}
+
// If we reach here, all incoming values are the same constant or undef.
return CommonValue ? CommonValue : UndefValue::get(PN->getType());
}
// Scan the operand list, checking to see if they are all constants, if so,
// hand off to ConstantFoldInstOperands.
SmallVector<Constant*, 8> Ops;
- for (User::op_iterator i = I->op_begin(), e = I->op_end(); i != e; ++i)
- if (Constant *Op = dyn_cast<Constant>(*i))
- Ops.push_back(Op);
- else
+ for (User::op_iterator i = I->op_begin(), e = I->op_end(); i != e; ++i) {
+ Constant *Op = dyn_cast<Constant>(*i);
+ if (!Op)
return 0; // All operands not constant!
+ // Fold the Instruction's operands.
+ if (ConstantExpr *NewCE = dyn_cast<ConstantExpr>(Op))
+ Op = ConstantFoldConstantExpression(NewCE, TD, TLI);
+
+ Ops.push_back(Op);
+ }
+
if (const CmpInst *CI = dyn_cast<CmpInst>(I))
return ConstantFoldCompareInstOperands(CI->getPredicate(), Ops[0], Ops[1],
- TD);
+ TD, TLI);
if (const LoadInst *LI = dyn_cast<LoadInst>(I))
return ConstantFoldLoadInst(LI, TD);
return ConstantExpr::getInsertValue(
cast<Constant>(IVI->getAggregateOperand()),
cast<Constant>(IVI->getInsertedValueOperand()),
- IVI->idx_begin(), IVI->getNumIndices());
+ IVI->getIndices());
if (ExtractValueInst *EVI = dyn_cast<ExtractValueInst>(I))
return ConstantExpr::getExtractValue(
cast<Constant>(EVI->getAggregateOperand()),
- EVI->idx_begin(), EVI->getNumIndices());
+ EVI->getIndices());
- return ConstantFoldInstOperands(I->getOpcode(), I->getType(),
- Ops.data(), Ops.size(), TD);
+ return ConstantFoldInstOperands(I->getOpcode(), I->getType(), Ops, TD, TLI);
}
/// ConstantFoldConstantExpression - Attempt to fold the constant expression
-/// using the specified TargetData. If successful, the constant result is
+/// using the specified DataLayout. If successful, the constant result is
/// result is returned, if not, null is returned.
Constant *llvm::ConstantFoldConstantExpression(const ConstantExpr *CE,
- const TargetData *TD) {
+ const DataLayout *TD,
+ const TargetLibraryInfo *TLI) {
SmallVector<Constant*, 8> Ops;
for (User::const_op_iterator i = CE->op_begin(), e = CE->op_end();
i != e; ++i) {
Constant *NewC = cast<Constant>(*i);
// Recursively fold the ConstantExpr's operands.
if (ConstantExpr *NewCE = dyn_cast<ConstantExpr>(NewC))
- NewC = ConstantFoldConstantExpression(NewCE, TD);
+ NewC = ConstantFoldConstantExpression(NewCE, TD, TLI);
Ops.push_back(NewC);
}
if (CE->isCompare())
return ConstantFoldCompareInstOperands(CE->getPredicate(), Ops[0], Ops[1],
- TD);
- return ConstantFoldInstOperands(CE->getOpcode(), CE->getType(),
- Ops.data(), Ops.size(), TD);
+ TD, TLI);
+ return ConstantFoldInstOperands(CE->getOpcode(), CE->getType(), Ops, TD, TLI);
}
/// ConstantFoldInstOperands - Attempt to constant fold an instruction with the
/// information, due to only being passed an opcode and operands. Constant
/// folding using this function strips this information.
///
-Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, const Type *DestTy,
- Constant* const* Ops, unsigned NumOps,
- const TargetData *TD) {
+Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, Type *DestTy,
+ ArrayRef<Constant *> Ops,
+ const DataLayout *TD,
+ const TargetLibraryInfo *TLI) {
// Handle easy binops first.
if (Instruction::isBinaryOp(Opcode)) {
if (isa<ConstantExpr>(Ops[0]) || isa<ConstantExpr>(Ops[1]))
switch (Opcode) {
default: return 0;
case Instruction::ICmp:
- case Instruction::FCmp: assert(0 && "Invalid for compares");
+ case Instruction::FCmp: llvm_unreachable("Invalid for compares");
case Instruction::Call:
- if (Function *F = dyn_cast<Function>(Ops[NumOps - 1]))
+ if (Function *F = dyn_cast<Function>(Ops.back()))
if (canConstantFoldCallTo(F))
- return ConstantFoldCall(F, Ops, NumOps - 1);
+ return ConstantFoldCall(F, Ops.slice(0, Ops.size() - 1), TLI);
return 0;
case Instruction::PtrToInt:
// If the input is a inttoptr, eliminate the pair. This requires knowing
if (TD && CE->getOpcode() == Instruction::IntToPtr) {
Constant *Input = CE->getOperand(0);
unsigned InWidth = Input->getType()->getScalarSizeInBits();
- if (TD->getPointerSizeInBits() < InWidth) {
+ unsigned AS = cast<PointerType>(CE->getType())->getAddressSpace();
+ if (TD->getPointerSizeInBits(AS) < InWidth) {
Constant *Mask =
ConstantInt::get(CE->getContext(), APInt::getLowBitsSet(InWidth,
- TD->getPointerSizeInBits()));
+ TD->getPointerSizeInBits(AS)));
Input = ConstantExpr::getAnd(Input, Mask);
}
// Do a zext or trunc to get to the dest size.
// the int size is >= the ptr size. This requires knowing the width of a
// pointer, so it can't be done in ConstantExpr::getCast.
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Ops[0]))
- if (TD &&
- TD->getPointerSizeInBits() <= CE->getType()->getScalarSizeInBits() &&
- CE->getOpcode() == Instruction::PtrToInt)
+ if (TD && CE->getOpcode() == Instruction::PtrToInt &&
+ TD->getPointerSizeInBits(
+ cast<PointerType>(CE->getOperand(0)->getType())->getAddressSpace())
+ <= CE->getType()->getScalarSizeInBits())
return FoldBitCast(CE->getOperand(0), DestTy, *TD);
return ConstantExpr::getCast(Opcode, Ops[0], DestTy);
case Instruction::ShuffleVector:
return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
case Instruction::GetElementPtr:
- if (Constant *C = CastGEPIndices(Ops, NumOps, DestTy, TD))
+ if (Constant *C = CastGEPIndices(Ops, DestTy, TD, TLI))
return C;
- if (Constant *C = SymbolicallyEvaluateGEP(Ops, NumOps, DestTy, TD))
+ if (Constant *C = SymbolicallyEvaluateGEP(Ops, DestTy, TD, TLI))
return C;
- return ConstantExpr::getGetElementPtr(Ops[0], Ops+1, NumOps-1);
+ return ConstantExpr::getGetElementPtr(Ops[0], Ops.slice(1));
}
}
///
Constant *llvm::ConstantFoldCompareInstOperands(unsigned Predicate,
Constant *Ops0, Constant *Ops1,
- const TargetData *TD) {
+ const DataLayout *TD,
+ const TargetLibraryInfo *TLI) {
// fold: icmp (inttoptr x), null -> icmp x, 0
// fold: icmp (ptrtoint x), 0 -> icmp x, null
// fold: icmp (inttoptr x), (inttoptr y) -> icmp trunc/zext x, trunc/zext y
// around to know if bit truncation is happening.
if (ConstantExpr *CE0 = dyn_cast<ConstantExpr>(Ops0)) {
if (TD && Ops1->isNullValue()) {
- const Type *IntPtrTy = TD->getIntPtrType(CE0->getContext());
+ Type *IntPtrTy = TD->getIntPtrType(CE0->getContext());
if (CE0->getOpcode() == Instruction::IntToPtr) {
// Convert the integer value to the right size to ensure we get the
// proper extension or truncation.
Constant *C = ConstantExpr::getIntegerCast(CE0->getOperand(0),
IntPtrTy, false);
Constant *Null = Constant::getNullValue(C->getType());
- return ConstantFoldCompareInstOperands(Predicate, C, Null, TD);
+ return ConstantFoldCompareInstOperands(Predicate, C, Null, TD, TLI);
}
// Only do this transformation if the int is intptrty in size, otherwise
CE0->getType() == IntPtrTy) {
Constant *C = CE0->getOperand(0);
Constant *Null = Constant::getNullValue(C->getType());
- return ConstantFoldCompareInstOperands(Predicate, C, Null, TD);
+ return ConstantFoldCompareInstOperands(Predicate, C, Null, TD, TLI);
}
}
if (ConstantExpr *CE1 = dyn_cast<ConstantExpr>(Ops1)) {
if (TD && CE0->getOpcode() == CE1->getOpcode()) {
- const Type *IntPtrTy = TD->getIntPtrType(CE0->getContext());
+ Type *IntPtrTy = TD->getIntPtrType(CE0->getContext());
if (CE0->getOpcode() == Instruction::IntToPtr) {
// Convert the integer value to the right size to ensure we get the
IntPtrTy, false);
Constant *C1 = ConstantExpr::getIntegerCast(CE1->getOperand(0),
IntPtrTy, false);
- return ConstantFoldCompareInstOperands(Predicate, C0, C1, TD);
+ return ConstantFoldCompareInstOperands(Predicate, C0, C1, TD, TLI);
}
// Only do this transformation if the int is intptrty in size, otherwise
CE0->getType() == IntPtrTy &&
CE0->getOperand(0)->getType() == CE1->getOperand(0)->getType()))
return ConstantFoldCompareInstOperands(Predicate, CE0->getOperand(0),
- CE1->getOperand(0), TD);
+ CE1->getOperand(0), TD, TLI);
}
}
if ((Predicate == ICmpInst::ICMP_EQ || Predicate == ICmpInst::ICMP_NE) &&
CE0->getOpcode() == Instruction::Or && Ops1->isNullValue()) {
Constant *LHS =
- ConstantFoldCompareInstOperands(Predicate, CE0->getOperand(0), Ops1,TD);
+ ConstantFoldCompareInstOperands(Predicate, CE0->getOperand(0), Ops1,
+ TD, TLI);
Constant *RHS =
- ConstantFoldCompareInstOperands(Predicate, CE0->getOperand(1), Ops1,TD);
+ ConstantFoldCompareInstOperands(Predicate, CE0->getOperand(1), Ops1,
+ TD, TLI);
unsigned OpC =
Predicate == ICmpInst::ICMP_EQ ? Instruction::And : Instruction::Or;
Constant *Ops[] = { LHS, RHS };
- return ConstantFoldInstOperands(OpC, LHS->getType(), Ops, 2, TD);
+ return ConstantFoldInstOperands(OpC, LHS->getType(), Ops, TD, TLI);
}
}
/// constant expression, or null if something is funny and we can't decide.
Constant *llvm::ConstantFoldLoadThroughGEPConstantExpr(Constant *C,
ConstantExpr *CE) {
- if (CE->getOperand(1) != Constant::getNullValue(CE->getOperand(1)->getType()))
+ if (!CE->getOperand(1)->isNullValue())
return 0; // Do not allow stepping over the value!
-
+
// Loop over all of the operands, tracking down which value we are
- // addressing...
- gep_type_iterator I = gep_type_begin(CE), E = gep_type_end(CE);
- for (++I; I != E; ++I)
- if (const StructType *STy = dyn_cast<StructType>(*I)) {
- ConstantInt *CU = cast<ConstantInt>(I.getOperand());
- assert(CU->getZExtValue() < STy->getNumElements() &&
- "Struct index out of range!");
- unsigned El = (unsigned)CU->getZExtValue();
- if (ConstantStruct *CS = dyn_cast<ConstantStruct>(C)) {
- C = CS->getOperand(El);
- } else if (isa<ConstantAggregateZero>(C)) {
- C = Constant::getNullValue(STy->getElementType(El));
- } else if (isa<UndefValue>(C)) {
- C = UndefValue::get(STy->getElementType(El));
- } else {
- return 0;
- }
- } else if (ConstantInt *CI = dyn_cast<ConstantInt>(I.getOperand())) {
- if (const ArrayType *ATy = dyn_cast<ArrayType>(*I)) {
- if (CI->getZExtValue() >= ATy->getNumElements())
- return 0;
- if (ConstantArray *CA = dyn_cast<ConstantArray>(C))
- C = CA->getOperand(CI->getZExtValue());
- else if (isa<ConstantAggregateZero>(C))
- C = Constant::getNullValue(ATy->getElementType());
- else if (isa<UndefValue>(C))
- C = UndefValue::get(ATy->getElementType());
- else
- return 0;
- } else if (const VectorType *VTy = dyn_cast<VectorType>(*I)) {
- if (CI->getZExtValue() >= VTy->getNumElements())
- return 0;
- if (ConstantVector *CP = dyn_cast<ConstantVector>(C))
- C = CP->getOperand(CI->getZExtValue());
- else if (isa<ConstantAggregateZero>(C))
- C = Constant::getNullValue(VTy->getElementType());
- else if (isa<UndefValue>(C))
- C = UndefValue::get(VTy->getElementType());
- else
- return 0;
- } else {
- return 0;
- }
- } else {
- return 0;
- }
+ // addressing.
+ for (unsigned i = 2, e = CE->getNumOperands(); i != e; ++i) {
+ C = C->getAggregateElement(CE->getOperand(i));
+ if (C == 0) return 0;
+ }
+ return C;
+}
+
+/// ConstantFoldLoadThroughGEPIndices - Given a constant and getelementptr
+/// indices (with an *implied* zero pointer index that is not in the list),
+/// return the constant value being addressed by a virtual load, or null if
+/// something is funny and we can't decide.
+Constant *llvm::ConstantFoldLoadThroughGEPIndices(Constant *C,
+ ArrayRef<Constant*> Indices) {
+ // Loop over all of the operands, tracking down which value we are
+ // addressing.
+ for (unsigned i = 0, e = Indices.size(); i != e; ++i) {
+ C = C->getAggregateElement(Indices[i]);
+ if (C == 0) return 0;
+ }
return C;
}
llvm::canConstantFoldCallTo(const Function *F) {
switch (F->getIntrinsicID()) {
case Intrinsic::sqrt:
+ case Intrinsic::pow:
case Intrinsic::powi:
case Intrinsic::bswap:
case Intrinsic::ctpop:
case Intrinsic::ctlz:
case Intrinsic::cttz:
- case Intrinsic::uadd_with_overflow:
- case Intrinsic::usub_with_overflow:
case Intrinsic::sadd_with_overflow:
+ case Intrinsic::uadd_with_overflow:
case Intrinsic::ssub_with_overflow:
+ case Intrinsic::usub_with_overflow:
case Intrinsic::smul_with_overflow:
+ case Intrinsic::umul_with_overflow:
case Intrinsic::convert_from_fp16:
case Intrinsic::convert_to_fp16:
case Intrinsic::x86_sse_cvtss2si:
case 'c':
return Name == "cos" || Name == "ceil" || Name == "cosf" || Name == "cosh";
case 'e':
- return Name == "exp";
+ return Name == "exp" || Name == "exp2";
case 'f':
return Name == "fabs" || Name == "fmod" || Name == "floor";
case 'l':
}
static Constant *ConstantFoldFP(double (*NativeFP)(double), double V,
- const Type *Ty) {
+ Type *Ty) {
sys::llvm_fenv_clearexcept();
V = NativeFP(V);
if (sys::llvm_fenv_testexcept()) {
if (Ty->isDoubleTy())
return ConstantFP::get(Ty->getContext(), APFloat(V));
llvm_unreachable("Can only constant fold float/double");
- return 0; // dummy return to suppress warning
}
static Constant *ConstantFoldBinaryFP(double (*NativeFP)(double, double),
- double V, double W, const Type *Ty) {
+ double V, double W, Type *Ty) {
sys::llvm_fenv_clearexcept();
V = NativeFP(V, W);
if (sys::llvm_fenv_testexcept()) {
if (Ty->isDoubleTy())
return ConstantFP::get(Ty->getContext(), APFloat(V));
llvm_unreachable("Can only constant fold float/double");
- return 0; // dummy return to suppress warning
}
/// ConstantFoldConvertToInt - Attempt to an SSE floating point to integer
/// available for the result. Returns null if the conversion cannot be
/// performed, otherwise returns the Constant value resulting from the
/// conversion.
-static Constant *ConstantFoldConvertToInt(ConstantFP *Op, bool roundTowardZero,
- const Type *Ty) {
- assert(Op && "Called with NULL operand");
- APFloat Val(Op->getValueAPF());
-
+static Constant *ConstantFoldConvertToInt(const APFloat &Val,
+ bool roundTowardZero, Type *Ty) {
// All of these conversion intrinsics form an integer of at most 64bits.
unsigned ResultWidth = cast<IntegerType>(Ty)->getBitWidth();
assert(ResultWidth <= 64 &&
/// ConstantFoldCall - Attempt to constant fold a call to the specified function
/// with the specified arguments, returning null if unsuccessful.
Constant *
-llvm::ConstantFoldCall(Function *F,
- Constant *const *Operands, unsigned NumOperands) {
+llvm::ConstantFoldCall(Function *F, ArrayRef<Constant *> Operands,
+ const TargetLibraryInfo *TLI) {
if (!F->hasName()) return 0;
StringRef Name = F->getName();
- const Type *Ty = F->getReturnType();
- if (NumOperands == 1) {
+ Type *Ty = F->getReturnType();
+ if (Operands.size() == 1) {
if (ConstantFP *Op = dyn_cast<ConstantFP>(Operands[0])) {
if (F->getIntrinsicID() == Intrinsic::convert_to_fp16) {
APFloat Val(Op->getValueAPF());
return ConstantInt::get(F->getContext(), Val.bitcastToAPInt());
}
+ if (!TLI)
+ return 0;
if (!Ty->isFloatTy() && !Ty->isDoubleTy())
return 0;
Op->getValueAPF().convertToDouble();
switch (Name[0]) {
case 'a':
- if (Name == "acos")
+ if (Name == "acos" && TLI->has(LibFunc::acos))
return ConstantFoldFP(acos, V, Ty);
- else if (Name == "asin")
+ else if (Name == "asin" && TLI->has(LibFunc::asin))
return ConstantFoldFP(asin, V, Ty);
- else if (Name == "atan")
+ else if (Name == "atan" && TLI->has(LibFunc::atan))
return ConstantFoldFP(atan, V, Ty);
break;
case 'c':
- if (Name == "ceil")
+ if (Name == "ceil" && TLI->has(LibFunc::ceil))
return ConstantFoldFP(ceil, V, Ty);
- else if (Name == "cos")
+ else if (Name == "cos" && TLI->has(LibFunc::cos))
return ConstantFoldFP(cos, V, Ty);
- else if (Name == "cosh")
+ else if (Name == "cosh" && TLI->has(LibFunc::cosh))
return ConstantFoldFP(cosh, V, Ty);
- else if (Name == "cosf")
+ else if (Name == "cosf" && TLI->has(LibFunc::cosf))
return ConstantFoldFP(cos, V, Ty);
break;
case 'e':
- if (Name == "exp")
+ if (Name == "exp" && TLI->has(LibFunc::exp))
return ConstantFoldFP(exp, V, Ty);
+
+ if (Name == "exp2" && TLI->has(LibFunc::exp2)) {
+ // Constant fold exp2(x) as pow(2,x) in case the host doesn't have a
+ // C99 library.
+ return ConstantFoldBinaryFP(pow, 2.0, V, Ty);
+ }
break;
case 'f':
- if (Name == "fabs")
+ if (Name == "fabs" && TLI->has(LibFunc::fabs))
return ConstantFoldFP(fabs, V, Ty);
- else if (Name == "floor")
+ else if (Name == "floor" && TLI->has(LibFunc::floor))
return ConstantFoldFP(floor, V, Ty);
break;
case 'l':
- if (Name == "log" && V > 0)
+ if (Name == "log" && V > 0 && TLI->has(LibFunc::log))
return ConstantFoldFP(log, V, Ty);
- else if (Name == "log10" && V > 0)
+ else if (Name == "log10" && V > 0 && TLI->has(LibFunc::log10))
return ConstantFoldFP(log10, V, Ty);
else if (F->getIntrinsicID() == Intrinsic::sqrt &&
(Ty->isFloatTy() || Ty->isDoubleTy())) {
}
break;
case 's':
- if (Name == "sin")
+ if (Name == "sin" && TLI->has(LibFunc::sin))
return ConstantFoldFP(sin, V, Ty);
- else if (Name == "sinh")
+ else if (Name == "sinh" && TLI->has(LibFunc::sinh))
return ConstantFoldFP(sinh, V, Ty);
- else if (Name == "sqrt" && V >= 0)
+ else if (Name == "sqrt" && V >= 0 && TLI->has(LibFunc::sqrt))
return ConstantFoldFP(sqrt, V, Ty);
- else if (Name == "sqrtf" && V >= 0)
+ else if (Name == "sqrtf" && V >= 0 && TLI->has(LibFunc::sqrtf))
return ConstantFoldFP(sqrt, V, Ty);
- else if (Name == "sinf")
+ else if (Name == "sinf" && TLI->has(LibFunc::sinf))
return ConstantFoldFP(sin, V, Ty);
break;
case 't':
- if (Name == "tan")
+ if (Name == "tan" && TLI->has(LibFunc::tan))
return ConstantFoldFP(tan, V, Ty);
- else if (Name == "tanh")
+ else if (Name == "tanh" && TLI->has(LibFunc::tanh))
return ConstantFoldFP(tanh, V, Ty);
break;
default:
return ConstantInt::get(F->getContext(), Op->getValue().byteSwap());
case Intrinsic::ctpop:
return ConstantInt::get(Ty, Op->getValue().countPopulation());
- case Intrinsic::cttz:
- return ConstantInt::get(Ty, Op->getValue().countTrailingZeros());
- case Intrinsic::ctlz:
- return ConstantInt::get(Ty, Op->getValue().countLeadingZeros());
case Intrinsic::convert_from_fp16: {
APFloat Val(Op->getValue());
}
}
- if (ConstantVector *Op = dyn_cast<ConstantVector>(Operands[0])) {
+ // Support ConstantVector in case we have an Undef in the top.
+ if (isa<ConstantVector>(Operands[0]) ||
+ isa<ConstantDataVector>(Operands[0])) {
+ Constant *Op = cast<Constant>(Operands[0]);
switch (F->getIntrinsicID()) {
default: break;
case Intrinsic::x86_sse_cvtss2si:
case Intrinsic::x86_sse_cvtss2si64:
case Intrinsic::x86_sse2_cvtsd2si:
case Intrinsic::x86_sse2_cvtsd2si64:
- if (ConstantFP *FPOp = dyn_cast<ConstantFP>(Op->getOperand(0)))
- return ConstantFoldConvertToInt(FPOp, /*roundTowardZero=*/false, Ty);
+ if (ConstantFP *FPOp =
+ dyn_cast_or_null<ConstantFP>(Op->getAggregateElement(0U)))
+ return ConstantFoldConvertToInt(FPOp->getValueAPF(),
+ /*roundTowardZero=*/false, Ty);
case Intrinsic::x86_sse_cvttss2si:
case Intrinsic::x86_sse_cvttss2si64:
case Intrinsic::x86_sse2_cvttsd2si:
case Intrinsic::x86_sse2_cvttsd2si64:
- if (ConstantFP *FPOp = dyn_cast<ConstantFP>(Op->getOperand(0)))
- return ConstantFoldConvertToInt(FPOp, /*roundTowardZero=*/true, Ty);
+ if (ConstantFP *FPOp =
+ dyn_cast_or_null<ConstantFP>(Op->getAggregateElement(0U)))
+ return ConstantFoldConvertToInt(FPOp->getValueAPF(),
+ /*roundTowardZero=*/true, Ty);
}
}
-
+
if (isa<UndefValue>(Operands[0])) {
if (F->getIntrinsicID() == Intrinsic::bswap)
return Operands[0];
return 0;
}
- if (NumOperands == 2) {
+ if (Operands.size() == 2) {
if (ConstantFP *Op1 = dyn_cast<ConstantFP>(Operands[0])) {
if (!Ty->isFloatTy() && !Ty->isDoubleTy())
return 0;
if (ConstantFP *Op2 = dyn_cast<ConstantFP>(Operands[1])) {
if (Op2->getType() != Op1->getType())
return 0;
-
+
double Op2V = Ty->isFloatTy() ?
(double)Op2->getValueAPF().convertToFloat():
Op2->getValueAPF().convertToDouble();
- if (Name == "pow")
+ if (F->getIntrinsicID() == Intrinsic::pow) {
return ConstantFoldBinaryFP(pow, Op1V, Op2V, Ty);
- if (Name == "fmod")
+ }
+ if (!TLI)
+ return 0;
+ if (Name == "pow" && TLI->has(LibFunc::pow))
+ return ConstantFoldBinaryFP(pow, Op1V, Op2V, Ty);
+ if (Name == "fmod" && TLI->has(LibFunc::fmod))
return ConstantFoldBinaryFP(fmod, Op1V, Op2V, Ty);
- if (Name == "atan2")
+ if (Name == "atan2" && TLI->has(LibFunc::atan2))
return ConstantFoldBinaryFP(atan2, Op1V, Op2V, Ty);
} else if (ConstantInt *Op2C = dyn_cast<ConstantInt>(Operands[1])) {
if (F->getIntrinsicID() == Intrinsic::powi && Ty->isFloatTy())
return 0;
}
-
if (ConstantInt *Op1 = dyn_cast<ConstantInt>(Operands[0])) {
if (ConstantInt *Op2 = dyn_cast<ConstantInt>(Operands[1])) {
switch (F->getIntrinsicID()) {
case Intrinsic::uadd_with_overflow:
case Intrinsic::ssub_with_overflow:
case Intrinsic::usub_with_overflow:
- case Intrinsic::smul_with_overflow: {
+ case Intrinsic::smul_with_overflow:
+ case Intrinsic::umul_with_overflow: {
APInt Res;
bool Overflow;
switch (F->getIntrinsicID()) {
- default: assert(0 && "Invalid case");
+ default: llvm_unreachable("Invalid case");
case Intrinsic::sadd_with_overflow:
Res = Op1->getValue().sadd_ov(Op2->getValue(), Overflow);
break;
case Intrinsic::smul_with_overflow:
Res = Op1->getValue().smul_ov(Op2->getValue(), Overflow);
break;
+ case Intrinsic::umul_with_overflow:
+ Res = Op1->getValue().umul_ov(Op2->getValue(), Overflow);
+ break;
}
Constant *Ops[] = {
ConstantInt::get(F->getContext(), Res),
ConstantInt::get(Type::getInt1Ty(F->getContext()), Overflow)
};
- return ConstantStruct::get(F->getContext(), Ops, 2, false);
+ return ConstantStruct::get(cast<StructType>(F->getReturnType()), Ops);
}
+ case Intrinsic::cttz:
+ // FIXME: This should check for Op2 == 1, and become unreachable if
+ // Op1 == 0.
+ return ConstantInt::get(Ty, Op1->getValue().countTrailingZeros());
+ case Intrinsic::ctlz:
+ // FIXME: This should check for Op2 == 1, and become unreachable if
+ // Op1 == 0.
+ return ConstantInt::get(Ty, Op1->getValue().countLeadingZeros());
}
}
projects / oota-llvm.git / blobdiff