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.cpp b/lib/CodeGen/LiveIntervalUnion.cpp
index 9c579af..dadd02b 100644
--- a/lib/CodeGen/LiveIntervalUnion.cpp
+++ b/lib/CodeGen/LiveIntervalUnion.cpp
@@ -208,3 +208,26 @@
VRI = VirtReg->advanceTo(VRI, Overlaps.start());
}
}
+
+void LiveIntervalUnion::Array::init(LiveIntervalUnion::Allocator &Alloc,
+ unsigned NSize) {
+ // Reuse existing allocation.
+ if (NSize == Size)
+ return;
+ clear();
+ Size = NSize;
+ LIUs = static_cast<LiveIntervalUnion*>(
+ malloc(sizeof(LiveIntervalUnion)*NSize));
+ for (unsigned i = 0; i != Size; ++i)
+ new(LIUs + i) LiveIntervalUnion(Alloc);
+}
+
+void LiveIntervalUnion::Array::clear() {
+ if (!LIUs)
+ return;
+ for (unsigned i = 0; i != Size; ++i)
+ LIUs[i].~LiveIntervalUnion();
+ free(LIUs);
+ Size = 0;
+ LIUs = 0;
+}