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-rw-r--r--lib/Analysis/ConstantFolding.cpp142
1 files changed, 71 insertions, 71 deletions
diff --git a/lib/Analysis/ConstantFolding.cpp b/lib/Analysis/ConstantFolding.cpp
index 7938ca6dd8..d60b4f6800 100644
--- a/lib/Analysis/ConstantFolding.cpp
+++ b/lib/Analysis/ConstantFolding.cpp
@@ -95,7 +95,7 @@ static bool IsConstantOffsetFromGlobal(Constant *C, GlobalValue *&GV,
/// otherwise TD is null.
static Constant *SymbolicallyEvaluateBinop(unsigned Opc, Constant *Op0,
Constant *Op1, const TargetData *TD,
- LLVMContext *Context){
+ LLVMContext &Context){
// SROA
// Fold (and 0xffffffff00000000, (shl x, 32)) -> shl.
@@ -113,7 +113,7 @@ static Constant *SymbolicallyEvaluateBinop(unsigned Opc, Constant *Op0,
if (IsConstantOffsetFromGlobal(Op1, GV2, Offs2, *TD) &&
GV1 == GV2) {
// (&GV+C1) - (&GV+C2) -> C1-C2, pointer arithmetic cannot overflow.
- return Context->getConstantInt(Op0->getType(), Offs1-Offs2);
+ return Context.getConstantInt(Op0->getType(), Offs1-Offs2);
}
}
@@ -124,7 +124,7 @@ static Constant *SymbolicallyEvaluateBinop(unsigned Opc, Constant *Op0,
/// constant expression, do so.
static Constant *SymbolicallyEvaluateGEP(Constant* const* Ops, unsigned NumOps,
const Type *ResultTy,
- LLVMContext *Context,
+ LLVMContext &Context,
const TargetData *TD) {
Constant *Ptr = Ops[0];
if (!TD || !cast<PointerType>(Ptr->getType())->getElementType()->isSized())
@@ -151,14 +151,14 @@ static Constant *SymbolicallyEvaluateGEP(Constant* const* Ops, unsigned NumOps,
uint64_t Offset = TD->getIndexedOffset(Ptr->getType(),
(Value**)Ops+1, NumOps-1);
- Constant *C = Context->getConstantInt(TD->getIntPtrType(), Offset+BasePtr);
- return Context->getConstantExprIntToPtr(C, ResultTy);
+ Constant *C = Context.getConstantInt(TD->getIntPtrType(), Offset+BasePtr);
+ return Context.getConstantExprIntToPtr(C, ResultTy);
}
/// FoldBitCast - Constant fold bitcast, symbolically evaluating it with
/// targetdata. Return 0 if unfoldable.
static Constant *FoldBitCast(Constant *C, const Type *DestTy,
- const TargetData &TD, LLVMContext *Context) {
+ const TargetData &TD, LLVMContext &Context) {
// If this is a bitcast from constant vector -> vector, fold it.
if (ConstantVector *CV = dyn_cast<ConstantVector>(C)) {
if (const VectorType *DestVTy = dyn_cast<VectorType>(DestTy)) {
@@ -184,24 +184,24 @@ static Constant *FoldBitCast(Constant *C, const Type *DestTy,
if (DstEltTy->isFloatingPoint()) {
// Fold to an vector of integers with same size as our FP type.
unsigned FPWidth = DstEltTy->getPrimitiveSizeInBits();
- const Type *DestIVTy = Context->getVectorType(
- Context->getIntegerType(FPWidth), NumDstElt);
+ const Type *DestIVTy = Context.getVectorType(
+ Context.getIntegerType(FPWidth), NumDstElt);
// Recursively handle this integer conversion, if possible.
C = FoldBitCast(C, DestIVTy, TD, Context);
if (!C) return 0;
// Finally, VMCore can handle this now that #elts line up.
- return Context->getConstantExprBitCast(C, DestTy);
+ return Context.getConstantExprBitCast(C, DestTy);
}
// Okay, we know the destination is integer, if the input is FP, convert
// it to integer first.
if (SrcEltTy->isFloatingPoint()) {
unsigned FPWidth = SrcEltTy->getPrimitiveSizeInBits();
- const Type *SrcIVTy = Context->getVectorType(
- Context->getIntegerType(FPWidth), NumSrcElt);
+ const Type *SrcIVTy = Context.getVectorType(
+ Context.getIntegerType(FPWidth), NumSrcElt);
// Ask VMCore to do the conversion now that #elts line up.
- C = Context->getConstantExprBitCast(C, SrcIVTy);
+ C = Context.getConstantExprBitCast(C, SrcIVTy);
CV = dyn_cast<ConstantVector>(C);
if (!CV) return 0; // If VMCore wasn't able to fold it, bail out.
}
@@ -215,7 +215,7 @@ static Constant *FoldBitCast(Constant *C, const Type *DestTy,
SmallVector<Constant*, 32> Result;
if (NumDstElt < NumSrcElt) {
// Handle: bitcast (<4 x i32> <i32 0, i32 1, i32 2, i32 3> to <2 x i64>)
- Constant *Zero = Context->getNullValue(DstEltTy);
+ Constant *Zero = Context.getNullValue(DstEltTy);
unsigned Ratio = NumSrcElt/NumDstElt;
unsigned SrcBitSize = SrcEltTy->getPrimitiveSizeInBits();
unsigned SrcElt = 0;
@@ -228,15 +228,15 @@ static Constant *FoldBitCast(Constant *C, const Type *DestTy,
if (!Src) return 0; // Reject constantexpr elements.
// Zero extend the element to the right size.
- Src = Context->getConstantExprZExt(Src, Elt->getType());
+ Src = Context.getConstantExprZExt(Src, Elt->getType());
// Shift it to the right place, depending on endianness.
- Src = Context->getConstantExprShl(Src,
- Context->getConstantInt(Src->getType(), ShiftAmt));
+ Src = Context.getConstantExprShl(Src,
+ Context.getConstantInt(Src->getType(), ShiftAmt));
ShiftAmt += isLittleEndian ? SrcBitSize : -SrcBitSize;
// Mix it in.
- Elt = Context->getConstantExprOr(Elt, Src);
+ Elt = Context.getConstantExprOr(Elt, Src);
}
Result.push_back(Elt);
}
@@ -254,17 +254,17 @@ static Constant *FoldBitCast(Constant *C, const Type *DestTy,
for (unsigned j = 0; j != Ratio; ++j) {
// Shift the piece of the value into the right place, depending on
// endianness.
- Constant *Elt = Context->getConstantExprLShr(Src,
- Context->getConstantInt(Src->getType(), ShiftAmt));
+ Constant *Elt = Context.getConstantExprLShr(Src,
+ Context.getConstantInt(Src->getType(), ShiftAmt));
ShiftAmt += isLittleEndian ? DstBitSize : -DstBitSize;
// Truncate and remember this piece.
- Result.push_back(Context->getConstantExprTrunc(Elt, DstEltTy));
+ Result.push_back(Context.getConstantExprTrunc(Elt, DstEltTy));
}
}
}
- return Context->getConstantVector(Result.data(), Result.size());
+ return Context.getConstantVector(Result.data(), Result.size());
}
}
@@ -282,11 +282,11 @@ static Constant *FoldBitCast(Constant *C, const Type *DestTy,
/// is returned. Note that 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, LLVMContext *Context,
+Constant *llvm::ConstantFoldInstruction(Instruction *I, LLVMContext &Context,
const TargetData *TD) {
if (PHINode *PN = dyn_cast<PHINode>(I)) {
if (PN->getNumIncomingValues() == 0)
- return Context->getUndef(PN->getType());
+ return Context.getUndef(PN->getType());
Constant *Result = dyn_cast<Constant>(PN->getIncomingValue(0));
if (Result == 0) return 0;
@@ -322,7 +322,7 @@ Constant *llvm::ConstantFoldInstruction(Instruction *I, LLVMContext *Context,
/// using the specified TargetData. If successful, the constant result is
/// result is returned, if not, null is returned.
Constant *llvm::ConstantFoldConstantExpression(ConstantExpr *CE,
- LLVMContext *Context,
+ LLVMContext &Context,
const TargetData *TD) {
SmallVector<Constant*, 8> Ops;
for (User::op_iterator i = CE->op_begin(), e = CE->op_end(); i != e; ++i)
@@ -345,7 +345,7 @@ Constant *llvm::ConstantFoldConstantExpression(ConstantExpr *CE,
///
Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, const Type *DestTy,
Constant* const* Ops, unsigned NumOps,
- LLVMContext *Context,
+ LLVMContext &Context,
const TargetData *TD) {
// Handle easy binops first.
if (Instruction::isBinaryOp(Opcode)) {
@@ -354,7 +354,7 @@ Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, const Type *DestTy,
Context))
return C;
- return Context->getConstantExpr(Opcode, Ops[0], Ops[1]);
+ return Context.getConstantExpr(Opcode, Ops[0], Ops[1]);
}
switch (Opcode) {
@@ -376,15 +376,15 @@ Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, const Type *DestTy,
unsigned InWidth = Input->getType()->getScalarSizeInBits();
if (TD->getPointerSizeInBits() < InWidth) {
Constant *Mask =
- Context->getConstantInt(APInt::getLowBitsSet(InWidth,
+ Context.getConstantInt(APInt::getLowBitsSet(InWidth,
TD->getPointerSizeInBits()));
- Input = Context->getConstantExprAnd(Input, Mask);
+ Input = Context.getConstantExprAnd(Input, Mask);
}
// Do a zext or trunc to get to the dest size.
- return Context->getConstantExprIntegerCast(Input, DestTy, false);
+ return Context.getConstantExprIntegerCast(Input, DestTy, false);
}
}
- return Context->getConstantExprCast(Opcode, Ops[0], DestTy);
+ return Context.getConstantExprCast(Opcode, Ops[0], DestTy);
case Instruction::IntToPtr:
// If the input is a ptrtoint, turn the pair into a ptr to ptr bitcast if
// the int size is >= the ptr size. This requires knowing the width of a
@@ -396,7 +396,7 @@ Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, const Type *DestTy,
if (CE->getOpcode() == Instruction::PtrToInt) {
Constant *Input = CE->getOperand(0);
Constant *C = FoldBitCast(Input, DestTy, *TD, Context);
- return C ? C : Context->getConstantExprBitCast(Input, DestTy);
+ return C ? C : Context.getConstantExprBitCast(Input, DestTy);
}
// If there's a constant offset added to the integer value before
// it is casted back to a pointer, see if the expression can be
@@ -419,18 +419,18 @@ Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, const Type *DestTy,
if (ElemIdx.ult(APInt(ElemIdx.getBitWidth(),
AT->getNumElements()))) {
Constant *Index[] = {
- Context->getNullValue(CE->getType()),
- Context->getConstantInt(ElemIdx)
+ Context.getNullValue(CE->getType()),
+ Context.getConstantInt(ElemIdx)
};
return
- Context->getConstantExprGetElementPtr(GV, &Index[0], 2);
+ Context.getConstantExprGetElementPtr(GV, &Index[0], 2);
}
}
}
}
}
}
- return Context->getConstantExprCast(Opcode, Ops[0], DestTy);
+ return Context.getConstantExprCast(Opcode, Ops[0], DestTy);
case Instruction::Trunc:
case Instruction::ZExt:
case Instruction::SExt:
@@ -440,25 +440,25 @@ Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, const Type *DestTy,
case Instruction::SIToFP:
case Instruction::FPToUI:
case Instruction::FPToSI:
- return Context->getConstantExprCast(Opcode, Ops[0], DestTy);
+ return Context.getConstantExprCast(Opcode, Ops[0], DestTy);
case Instruction::BitCast:
if (TD)
if (Constant *C = FoldBitCast(Ops[0], DestTy, *TD, Context))
return C;
- return Context->getConstantExprBitCast(Ops[0], DestTy);
+ return Context.getConstantExprBitCast(Ops[0], DestTy);
case Instruction::Select:
- return Context->getConstantExprSelect(Ops[0], Ops[1], Ops[2]);
+ return Context.getConstantExprSelect(Ops[0], Ops[1], Ops[2]);
case Instruction::ExtractElement:
- return Context->getConstantExprExtractElement(Ops[0], Ops[1]);
+ return Context.getConstantExprExtractElement(Ops[0], Ops[1]);
case Instruction::InsertElement:
- return Context->getConstantExprInsertElement(Ops[0], Ops[1], Ops[2]);
+ return Context.getConstantExprInsertElement(Ops[0], Ops[1], Ops[2]);
case Instruction::ShuffleVector:
- return Context->getConstantExprShuffleVector(Ops[0], Ops[1], Ops[2]);
+ return Context.getConstantExprShuffleVector(Ops[0], Ops[1], Ops[2]);
case Instruction::GetElementPtr:
if (Constant *C = SymbolicallyEvaluateGEP(Ops, NumOps, DestTy, Context, TD))
return C;
- return Context->getConstantExprGetElementPtr(Ops[0], Ops+1, NumOps-1);
+ return Context.getConstantExprGetElementPtr(Ops[0], Ops+1, NumOps-1);
}
}
@@ -469,7 +469,7 @@ Constant *llvm::ConstantFoldInstOperands(unsigned Opcode, const Type *DestTy,
Constant *llvm::ConstantFoldCompareInstOperands(unsigned Predicate,
Constant*const * Ops,
unsigned NumOps,
- LLVMContext *Context,
+ LLVMContext &Context,
const TargetData *TD) {
// fold: icmp (inttoptr x), null -> icmp x, 0
// fold: icmp (ptrtoint x), 0 -> icmp x, null
@@ -484,9 +484,9 @@ Constant *llvm::ConstantFoldCompareInstOperands(unsigned Predicate,
if (CE0->getOpcode() == Instruction::IntToPtr) {
// Convert the integer value to the right size to ensure we get the
// proper extension or truncation.
- Constant *C = Context->getConstantExprIntegerCast(CE0->getOperand(0),
+ Constant *C = Context.getConstantExprIntegerCast(CE0->getOperand(0),
IntPtrTy, false);
- Constant *NewOps[] = { C, Context->getNullValue(C->getType()) };
+ Constant *NewOps[] = { C, Context.getNullValue(C->getType()) };
return ConstantFoldCompareInstOperands(Predicate, NewOps, 2,
Context, TD);
}
@@ -496,7 +496,7 @@ Constant *llvm::ConstantFoldCompareInstOperands(unsigned Predicate,
if (CE0->getOpcode() == Instruction::PtrToInt &&
CE0->getType() == IntPtrTy) {
Constant *C = CE0->getOperand(0);
- Constant *NewOps[] = { C, Context->getNullValue(C->getType()) };
+ Constant *NewOps[] = { C, Context.getNullValue(C->getType()) };
// FIXME!
return ConstantFoldCompareInstOperands(Predicate, NewOps, 2,
Context, TD);
@@ -510,9 +510,9 @@ Constant *llvm::ConstantFoldCompareInstOperands(unsigned Predicate,
if (CE0->getOpcode() == Instruction::IntToPtr) {
// Convert the integer value to the right size to ensure we get the
// proper extension or truncation.
- Constant *C0 = Context->getConstantExprIntegerCast(CE0->getOperand(0),
+ Constant *C0 = Context.getConstantExprIntegerCast(CE0->getOperand(0),
IntPtrTy, false);
- Constant *C1 = Context->getConstantExprIntegerCast(CE1->getOperand(0),
+ Constant *C1 = Context.getConstantExprIntegerCast(CE1->getOperand(0),
IntPtrTy, false);
Constant *NewOps[] = { C0, C1 };
return ConstantFoldCompareInstOperands(Predicate, NewOps, 2,
@@ -533,7 +533,7 @@ Constant *llvm::ConstantFoldCompareInstOperands(unsigned Predicate,
}
}
}
- return Context->getConstantExprCompare(Predicate, Ops[0], Ops[1]);
+ return Context.getConstantExprCompare(Predicate, Ops[0], Ops[1]);
}
@@ -542,8 +542,8 @@ Constant *llvm::ConstantFoldCompareInstOperands(unsigned Predicate,
/// constant expression, or null if something is funny and we can't decide.
Constant *llvm::ConstantFoldLoadThroughGEPConstantExpr(Constant *C,
ConstantExpr *CE,
- LLVMContext *Context) {
- if (CE->getOperand(1) != Context->getNullValue(CE->getOperand(1)->getType()))
+ LLVMContext &Context) {
+ if (CE->getOperand(1) != Context.getNullValue(CE->getOperand(1)->getType()))
return 0; // Do not allow stepping over the value!
// Loop over all of the operands, tracking down which value we are
@@ -558,9 +558,9 @@ Constant *llvm::ConstantFoldLoadThroughGEPConstantExpr(Constant *C,
if (ConstantStruct *CS = dyn_cast<ConstantStruct>(C)) {
C = CS->getOperand(El);
} else if (isa<ConstantAggregateZero>(C)) {
- C = Context->getNullValue(STy->getElementType(El));
+ C = Context.getNullValue(STy->getElementType(El));
} else if (isa<UndefValue>(C)) {
- C = Context->getUndef(STy->getElementType(El));
+ C = Context.getUndef(STy->getElementType(El));
} else {
return 0;
}
@@ -571,9 +571,9 @@ Constant *llvm::ConstantFoldLoadThroughGEPConstantExpr(Constant *C,
if (ConstantArray *CA = dyn_cast<ConstantArray>(C))
C = CA->getOperand(CI->getZExtValue());
else if (isa<ConstantAggregateZero>(C))
- C = Context->getNullValue(ATy->getElementType());
+ C = Context.getNullValue(ATy->getElementType());
else if (isa<UndefValue>(C))
- C = Context->getUndef(ATy->getElementType());
+ C = Context.getUndef(ATy->getElementType());
else
return 0;
} else if (const VectorType *PTy = dyn_cast<VectorType>(*I)) {
@@ -582,9 +582,9 @@ Constant *llvm::ConstantFoldLoadThroughGEPConstantExpr(Constant *C,
if (ConstantVector *CP = dyn_cast<ConstantVector>(C))
C = CP->getOperand(CI->getZExtValue());
else if (isa<ConstantAggregateZero>(C))
- C = Context->getNullValue(PTy->getElementType());
+ C = Context.getNullValue(PTy->getElementType());
else if (isa<UndefValue>(C))
- C = Context->getUndef(PTy->getElementType());
+ C = Context.getUndef(PTy->getElementType());
else
return 0;
} else {
@@ -679,7 +679,7 @@ llvm::canConstantFoldCallTo(const Function *F) {
}
static Constant *ConstantFoldFP(double (*NativeFP)(double), double V,
- const Type *Ty, LLVMContext *Context) {
+ const Type *Ty, LLVMContext &Context) {
errno = 0;
V = NativeFP(V);
if (errno != 0) {
@@ -688,9 +688,9 @@ static Constant *ConstantFoldFP(double (*NativeFP)(double), double V,
}
if (Ty == Type::FloatTy)
- return Context->getConstantFP(APFloat((float)V));
+ return Context.getConstantFP(APFloat((float)V));
if (Ty == Type::DoubleTy)
- return Context->getConstantFP(APFloat(V));
+ return Context.getConstantFP(APFloat(V));
llvm_unreachable("Can only constant fold float/double");
return 0; // dummy return to suppress warning
}
@@ -698,7 +698,7 @@ static Constant *ConstantFoldFP(double (*NativeFP)(double), double V,
static Constant *ConstantFoldBinaryFP(double (*NativeFP)(double, double),
double V, double W,
const Type *Ty,
- LLVMContext *Context) {
+ LLVMContext &Context) {
errno = 0;
V = NativeFP(V, W);
if (errno != 0) {
@@ -707,9 +707,9 @@ static Constant *ConstantFoldBinaryFP(double (*NativeFP)(double, double),
}
if (Ty == Type::FloatTy)
- return Context->getConstantFP(APFloat((float)V));
+ return Context.getConstantFP(APFloat((float)V));
if (Ty == Type::DoubleTy)
- return Context->getConstantFP(APFloat(V));
+ return Context.getConstantFP(APFloat(V));
llvm_unreachable("Can only constant fold float/double");
return 0; // dummy return to suppress warning
}
@@ -721,7 +721,7 @@ Constant *
llvm::ConstantFoldCall(Function *F,
Constant* const* Operands, unsigned NumOperands) {
if (!F->hasName()) return 0;
- LLVMContext *Context = F->getContext();
+ LLVMContext &Context = F->getContext();
const char *Str = F->getNameStart();
unsigned Len = F->getNameLen();
@@ -775,7 +775,7 @@ llvm::ConstantFoldCall(Function *F,
if (V >= -0.0)
return ConstantFoldFP(sqrt, V, Ty, Context);
else // Undefined
- return Context->getNullValue(Ty);
+ return Context.getNullValue(Ty);
}
break;
case 's':
@@ -801,13 +801,13 @@ llvm::ConstantFoldCall(Function *F,
}
} else if (ConstantInt *Op = dyn_cast<ConstantInt>(Operands[0])) {
if (Len > 11 && !memcmp(Str, "llvm.bswap", 10))
- return Context->getConstantInt(Op->getValue().byteSwap());
+ return Context.getConstantInt(Op->getValue().byteSwap());
else if (Len > 11 && !memcmp(Str, "llvm.ctpop", 10))
- return Context->getConstantInt(Ty, Op->getValue().countPopulation());
+ return Context.getConstantInt(Ty, Op->getValue().countPopulation());
else if (Len > 10 && !memcmp(Str, "llvm.cttz", 9))
- return Context->getConstantInt(Ty, Op->getValue().countTrailingZeros());
+ return Context.getConstantInt(Ty, Op->getValue().countTrailingZeros());
else if (Len > 10 && !memcmp(Str, "llvm.ctlz", 9))
- return Context->getConstantInt(Ty, Op->getValue().countLeadingZeros());
+ return Context.getConstantInt(Ty, Op->getValue().countLeadingZeros());
}
} else if (NumOperands == 2) {
if (ConstantFP *Op1 = dyn_cast<ConstantFP>(Operands[0])) {
@@ -830,10 +830,10 @@ llvm::ConstantFoldCall(Function *F,
}
} else if (ConstantInt *Op2C = dyn_cast<ConstantInt>(Operands[1])) {
if (!strcmp(Str, "llvm.powi.f32")) {
- return Context->getConstantFP(APFloat((float)std::pow((float)Op1V,
+ return Context.getConstantFP(APFloat((float)std::pow((float)Op1V,
(int)Op2C->getZExtValue())));
} else if (!strcmp(Str, "llvm.powi.f64")) {
- return Context->getConstantFP(APFloat((double)std::pow((double)Op1V,
+ return Context.getConstantFP(APFloat((double)std::pow((double)Op1V,
(int)Op2C->getZExtValue())));
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-19 23:58:12 +0000