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Add some bits that I found useful when converting InsertValueInst and

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ExtractValueInst APIs to use ArrayRef: a new constructor taking a
(begin, end) range, and operators == and != for element-wise comparison.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135039 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jay Foad 2011-07-13 09:15:05 +00:00
parent cf852dc49b
commit 5d4f9909c4
1 changed files with 30 additions and 1 deletions
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31
include/llvm/ADT/ArrayRef.h
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@ -39,7 +39,7 @@ namespace llvm {
const T *Data;
/// The number of elements.
size_t Length;
size_type Length;
public:
/// @name Constructors
@ -56,6 +56,10 @@ namespace llvm {
/*implicit*/ ArrayRef(const T *data, size_t length)
: Data(data), Length(length) {}
/// Construct an ArrayRef from a range.
ArrayRef(const T *begin, const T *end)
: Data(begin), Length(end - begin) {}
/// Construct an ArrayRef from a SmallVector.
/*implicit*/ ArrayRef(const SmallVectorImpl<T> &Vec)
: Data(Vec.data()), Length(Vec.size()) {}
@ -96,6 +100,16 @@ namespace llvm {
return Data[Length-1];
}
/// equals - Check for element-wise equality.
bool equals(ArrayRef RHS) const {
if (Length != RHS.Length)
return false;
for (size_type i = 0; i != Length; i++)
if (Data[i] != RHS.Data[i])
return false;
return true;
}
/// slice(n) - Chop off the first N elements of the array.
ArrayRef<T> slice(unsigned N) {
assert(N <= size() && "Invalid specifier");
@ -134,6 +148,21 @@ namespace llvm {
/// @}
};
/// @name ArrayRef Comparison Operators
/// @{
template<typename T>
inline bool operator==(ArrayRef<T> LHS, ArrayRef<T> RHS) {
return LHS.equals(RHS);
}
template<typename T>
inline bool operator!=(ArrayRef<T> LHS, ArrayRef<T> RHS) {
return !(LHS == RHS);
}
/// @}
// ArrayRefs can be treated like a POD type.
template <typename T> struct isPodLike;
template <typename T> struct isPodLike<ArrayRef<T> > {