Very minor typo. NFC

Typo `we we're` => `we were` in the pass EarlyCSE

Patch by liangdzou (Liang ZOU)

Differential Revision: https://reviews.llvm.org/D59241

llvm-svn: 355895

llvm/lib/Transforms/Scalar/EarlyCSE.cpp

@@ -1102,7 +1102,7 @@ bool EarlyCSE::processNode(DomTreeNode *Node) {
         // At the moment, we don't remove ordered stores, but do remove
         // unordered atomic stores.  There's no special requirement (for
         // unordered atomics) about removing atomic stores only in favor of
-        // other atomic stores since we we're going to execute the non-atomic
+        // other atomic stores since we were going to execute the non-atomic
         // one anyway and the atomic one might never have become visible.
         if (LastStore) {
           ParseMemoryInst LastStoreMemInst(LastStore, TTI);