diff --git a/devel/llvm-devel/files/patch-llvm_include_llvm_ADT_IntervalMap.h b/devel/llvm-devel/files/patch-llvm_include_llvm_ADT_IntervalMap.h
new file mode 100644
index 000000000000..431ead9f5ea8
--- /dev/null
+++ b/devel/llvm-devel/files/patch-llvm_include_llvm_ADT_IntervalMap.h
@@ -0,0 +1,14 @@
+--- llvm/include/llvm/ADT/IntervalMap.h.orig
++++ llvm/include/llvm/ADT/IntervalMap.h
+@@ -1042,6 +1042,11 @@
+     new(&rootLeaf()) RootLeaf();
+   }
+ 
++  IntervalMap(const IntervalMap &Other) : IntervalMap(Other.allocator) {
++    for (auto i = Other.begin(), e = Other.end(); i != e; ++i)
++      insert(i.start(), i.stop(), i.value());
++  }
++
+   ~IntervalMap() {
+     clear();
+     rootLeaf().~RootLeaf();