Move LiveUnionArray into LiveIntervalUnion.h
It is useful outside RegAllocBase.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158041 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveIntervalUnion.h b/lib/CodeGen/LiveIntervalUnion.h
index 4925abf..cd4e690 100644
--- a/lib/CodeGen/LiveIntervalUnion.h
+++ b/lib/CodeGen/LiveIntervalUnion.h
@@ -181,6 +181,28 @@
Query(const Query&); // DO NOT IMPLEMENT
void operator=(const Query&); // DO NOT IMPLEMENT
};
+
+ // Array of LiveIntervalUnions.
+ class Array {
+ unsigned Size;
+ LiveIntervalUnion *LIUs;
+ public:
+ Array() : Size(0), LIUs(0) {}
+ ~Array() { clear(); }
+
+ // Initialize the array to have Size entries.
+ // Reuse an existing allocation if the size matches.
+ void init(LiveIntervalUnion::Allocator&, unsigned Size);
+
+ unsigned size() const { return Size; }
+
+ void clear();
+
+ LiveIntervalUnion& operator[](unsigned idx) {
+ assert(idx < Size && "idx out of bounds");
+ return LIUs[idx];
+ }
+ };
};
} // end namespace llvm