[llvm] [EquivClasses] Shorten members_{begin,end} idiom (PR #134373)

[Florian Hahn via llvm-commits]

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@@ -184,6 +185,14 @@ class EquivalenceClasses {
     return member_iterator(nullptr);
   }
 
+  iterator_range<member_iterator> members(const ECValue &ECV) const {
+    return make_range(member_begin(ECV), member_end());
+  }
+
+  iterator_range<member_iterator> members(const ElemTy &V) const {
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fhahn wrote:

Is that variant used by anything other than the newly added unit test? If not, it might be better to update the unit test to use the ECValue variant and remove the function here?

https://github.com/llvm/llvm-project/pull/134373