/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
bool isNullValue() const;
+ /// isAllOnesValue - Return true if this is the value that would be returned by
+ /// getAllOnesValue.
+ bool isAllOnesValue() const;
/// isNegativeZeroValue - Return true if the value is what would be returned
/// by getZeroValueForNegation.
/// ConstantExpr if unfoldable.
static Constant *FoldBitCast(Constant *C, Type *DestTy,
const TargetData &TD) {
-
- ConstantVector *CV = dyn_cast<ConstantVector>(C);
- IntegerType *IntVTy = dyn_cast<IntegerType>(DestTy);
- // When casting vectors to scalar integers, catch the
- // obvious splat cases.
- if (IntVTy && CV) {
- if (CV->isNullValue()) return ConstantInt::getNullValue(IntVTy);
- if (CV->isAllOnesValue()) return ConstantInt::getAllOnesValue(IntVTy);
- }
+ // Catch the obvious splat cases.
+ if (C->isNullValue()) return Constant::getNullValue(DestTy);
+ if (C->isAllOnesValue()) return Constant::getAllOnesValue(DestTy);
// The code below only handles casts to vectors currently.
VectorType *DestVTy = dyn_cast<VectorType>(DestTy);
}
// If this is a bitcast from constant vector -> vector, fold it.
+ ConstantVector *CV = dyn_cast<ConstantVector>(C);
if (CV == 0)
return ConstantExpr::getBitCast(C, DestTy);
return isa<ConstantAggregateZero>(this) || isa<ConstantPointerNull>(this);
}
+bool Constant::isAllOnesValue() const {
+ // Check for -1 integers
+ if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
+ return CI->isAllOnesValue();
+
+ // +0.0 is null.
+ if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
+ return CFP->getValueAPF().bitcastToAPInt().isAllOnesValue();
+
+ // Check for constant vectors
+ if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
+ return CV->isAllOnesValue();
+
+ return false;
+}
// Constructor to create a '0' constant of arbitrary type...
Constant *Constant::getNullValue(Type *Ty) {
switch (Ty->getTypeID()) {
SmallVector<Constant*, 16> Elts;
VectorType *VTy = cast<VectorType>(Ty);
Elts.resize(VTy->getNumElements(), getAllOnesValue(VTy->getElementType()));
- assert(Elts[0] && "Not a vector integer type!");
+ assert(Elts[0] && "Invalid AllOnes value!");
return cast<ConstantVector>(ConstantVector::get(Elts));
}
// Check out first element.
const Constant *Elt = getOperand(0);
const ConstantInt *CI = dyn_cast<ConstantInt>(Elt);
- if (!CI || !CI->isAllOnesValue()) return false;
+ const ConstantFP *CF = dyn_cast<ConstantFP>(Elt);
+
// Then make sure all remaining elements point to the same value.
for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
if (getOperand(I) != Elt)
return false;
- return true;
+ // First value is all-ones.
+ return (CI && CI->isAllOnesValue()) ||
+ (CF && CF->isAllOnesValue());
}
/// getSplatValue - If this is a splat constant, where all of the
; CHECK: @ISPC0
; CHECK: ret i64 0
}
+
+
+define i64 @Vec2(i64 %in) {
+ %out = and i64 %in, xor (i64 bitcast (<4 x i16> <i16 0, i16 0, i16 0, i16 0> to i64), i64 0)
+ ret i64 %out
+; CHECK: @Vec2
+; CHECK: ret i64 0
+}
+
+define i64 @All11(i64 %in) {
+ %out = and i64 %in, xor (i64 bitcast (<2 x float> bitcast (i64 -1 to <2 x float>) to i64), i64 -1)
+ ret i64 %out
+; CHECK: @All11
+; CHECK: ret i64 0
+}
+
+
+define i64 @All111(i32 %in) {
+ %out = and i32 %in, xor (i64 bitcast (<1 x float> bitcast (i32 -1 to <1 x float>) to i32), i32 -1)
+ ret i32 %out
+; CHECK: @All11
+; CHECK: ret i32 0
+}
+