//
// 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/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"
//===----------------------------------------------------------------------===//
/// 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, Type *DestTy,
- const TargetData &TD) {
+ const DataLayout &TD) {
// Catch the obvious splat cases.
if (C->isNullValue() && !DestTy->isX86_MMXTy())
return Constant::getNullValue(DestTy);
/// 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;
/// 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");
}
static Constant *FoldReinterpretLoadFromConstPtr(Constant *C,
- const TargetData &TD) {
+ const DataLayout &TD) {
Type *LoadTy = cast<PointerType>(C->getType())->getElementType();
IntegerType *IntType = dyn_cast<IntegerType>(LoadTy);
/// 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())
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.
/// explicitly cast them so that they aren't implicitly casted by the
/// getelementptr.
static Constant *CastGEPIndices(ArrayRef<Constant *> Ops,
- Type *ResultTy, const TargetData *TD,
+ Type *ResultTy, const DataLayout *TD,
const TargetLibraryInfo *TLI) {
if (!TD) return 0;
Type *IntPtrTy = TD->getIntPtrType(ResultTy->getContext());
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(ArrayRef<Constant *> Ops,
- Type *ResultTy, const TargetData *TD,
+ Type *ResultTy, const DataLayout *TD,
const TargetLibraryInfo *TLI) {
Constant *Ptr = Ops[0];
if (!TD || !cast<PointerType>(Ptr->getType())->getElementType()->isSized() ||
}
return 0;
}
-
+
unsigned BitWidth = TD->getTypeSizeInBits(IntPtrTy);
APInt Offset =
APInt(BitWidth, TD->getIndexedOffset(Ptr->getType(),
- makeArrayRef((Value **)Ops.data() + 1,
+ makeArrayRef((Value *const*)
+ Ops.data() + 1,
Ops.size() - 1)));
- Ptr = cast<Constant>(Ptr->stripPointerCasts());
+ 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(), NestedOps));
- Ptr = cast<Constant>(Ptr->stripPointerCasts());
+ Ptr = StripPtrCastKeepAS(Ptr);
}
// If the base value for this address is a literal integer value, fold the
/// 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,
+ const DataLayout *TD,
const TargetLibraryInfo *TLI) {
// Handle PHI nodes quickly here...
if (PHINode *PN = dyn_cast<PHINode>(I)) {
}
/// 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();
///
Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, Type *DestTy,
ArrayRef<Constant *> Ops,
- const TargetData *TD,
+ const DataLayout *TD,
const TargetLibraryInfo *TLI) {
// Handle easy binops first.
if (Instruction::isBinaryOp(Opcode)) {
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);
///
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
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