Avoid many "variable 'Sub' set but not used [-Wunused-but-set-variable]" warnings

with gcc-4.6.  The warning is wrong, since Sub *is* used (perhaps gcc is confused
because the use of Sub is constant folded away?), but since it is trivial to avoid,
and massively reduces the amount of warning spew, just workaround the wrong warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105788 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/SymbolTableListTraits.h b/include/llvm/SymbolTableListTraits.h
index 39953e1a58099b88824e354d123f7dde64143aa9..91a4eb99ff0d368c489c7b0d9ff50829b93bf08a 100644 (file)
--- a/include/llvm/SymbolTableListTraits.h
+++ b/include/llvm/SymbolTableListTraits.h
@@ -47,9 +47,8 @@ public:
   /// of instructions, it returns the BasicBlock that owns them.
   ItemParentClass *getListOwner() {
     typedef iplist<ValueSubClass> ItemParentClass::*Sublist;
-    Sublist Sub(ItemParentClass::
-                getSublistAccess(static_cast<ValueSubClass*>(0)));
-    size_t Offset(size_t(&((ItemParentClass*)0->*Sub)));
+    size_t Offset(size_t(&((ItemParentClass*)0->*ItemParentClass::
+                           getSublistAccess(static_cast<ValueSubClass*>(0)))));
     iplist<ValueSubClass>* Anchor(static_cast<iplist<ValueSubClass>*>(this));
     return reinterpret_cast<ItemParentClass*>(reinterpret_cast<char*>(Anchor)-
                                               Offset);