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ConstantInt has some getters which return ConstantInt's or ConstantVector's of

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the value splatted into every element. Extend this to getTrue and getFalse which
by providing new overloads that take Types that are either i1 or <N x i1>. Use
it in InstCombine to add vector support to some code, fixing PR8469!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127116 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2011-03-06 03:36:19 +00:00
parent 511cab20cb
commit d01f50f42c
4 changed files with 65 additions and 28 deletions
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37
lib/VMCore/Constants.cpp
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@ -326,27 +326,53 @@ ConstantInt::ConstantInt(const IntegerType *Ty, const APInt& V)
assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
}
ConstantInt* ConstantInt::getTrue(LLVMContext &Context) {
ConstantInt *ConstantInt::getTrue(LLVMContext &Context) {
LLVMContextImpl *pImpl = Context.pImpl;
if (!pImpl->TheTrueVal)
pImpl->TheTrueVal = ConstantInt::get(Type::getInt1Ty(Context), 1);
return pImpl->TheTrueVal;
}
ConstantInt* ConstantInt::getFalse(LLVMContext &Context) {
ConstantInt *ConstantInt::getFalse(LLVMContext &Context) {
LLVMContextImpl *pImpl = Context.pImpl;
if (!pImpl->TheFalseVal)
pImpl->TheFalseVal = ConstantInt::get(Type::getInt1Ty(Context), 0);
return pImpl->TheFalseVal;
}
Constant *ConstantInt::getTrue(const Type *Ty) {
const VectorType *VTy = dyn_cast<VectorType>(Ty);
if (!VTy) {
assert(Ty->isIntegerTy(1) && "True must be i1 or vector of i1.");
return ConstantInt::getTrue(Ty->getContext());
}
assert(VTy->getElementType()->isIntegerTy(1) &&
"True must be vector of i1 or i1.");
SmallVector<Constant*, 16> Splat(VTy->getNumElements(),
ConstantInt::getTrue(Ty->getContext()));
return ConstantVector::get(Splat);
}
Constant *ConstantInt::getFalse(const Type *Ty) {
const VectorType *VTy = dyn_cast<VectorType>(Ty);
if (!VTy) {
assert(Ty->isIntegerTy(1) && "False must be i1 or vector of i1.");
return ConstantInt::getFalse(Ty->getContext());
}
assert(VTy->getElementType()->isIntegerTy(1) &&
"False must be vector of i1 or i1.");
SmallVector<Constant*, 16> Splat(VTy->getNumElements(),
ConstantInt::getFalse(Ty->getContext()));
return ConstantVector::get(Splat);
}
// Get a ConstantInt from an APInt. Note that the value stored in the DenseMap
// as the key, is a DenseMapAPIntKeyInfo::KeyTy which has provided the
// operator== and operator!= to ensure that the DenseMap doesn't attempt to
// compare APInt's of different widths, which would violate an APInt class
// invariant which generates an assertion.
ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt& V) {
ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt &V) {
// Get the corresponding integer type for the bit width of the value.
const IntegerType *ITy = IntegerType::get(Context, V.getBitWidth());
// get an existing value or the insertion position
@ -356,9 +382,8 @@ ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt& V) {
return Slot;
}
Constant *ConstantInt::get(const Type* Ty, uint64_t V, bool isSigned) {
Constant *C = get(cast<IntegerType>(Ty->getScalarType()),
V, isSigned);
Constant *ConstantInt::get(const Type *Ty, uint64_t V, bool isSigned) {
Constant *C = get(cast<IntegerType>(Ty->getScalarType()), V, isSigned);
// For vectors, broadcast the value.
if (const VectorType *VTy = dyn_cast<VectorType>(Ty))