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add a Constant::getAllOnesValue helper function, which works on integers 

AND vectors.

llvm-svn: 37586
This commit is contained in:
Chris Lattner 2007-06-15 06:10:53 +00:00
parent 1edec381a5
commit 72e3958003
2 changed files with 10 additions and 0 deletions
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5
llvm/include/llvm/Constant.h
View File

@ -48,6 +48,11 @@ public:
///
static Constant *getNullValue(const Type *Ty);
/// Static constructor to get a '-1' constant. This supports integers and
/// vectors.
///
static Constant *getAllOnesValue(const Type *Ty);
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
virtual bool isNullValue() const = 0;

5
llvm/lib/VMCore/Constants.cpp
View File

@ -122,6 +122,11 @@ Constant *Constant::getNullValue(const Type *Ty) {
}
}
Constant *Constant::getAllOnesValue(const Type *Ty) {
if (const IntegerType* ITy = dyn_cast<IntegerType>(Ty))
return ConstantInt::get(APInt::getAllOnesValue(ITy->getBitWidth()));
return ConstantVector::getAllOnesValue(cast<VectorType>(Ty));
}
// Static constructor to create an integral constant with all bits set
ConstantInt *ConstantInt::getAllOnesValue(const Type *Ty) {