When unifying instructions during a block diff, actually complain about

any differences we see.  This should only happen if there are "non-structural"
differences between the instructions, i.e. differences which wouldn't cause
diff to return true.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109742 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-diff/DifferenceEngine.cpp

@@ -549,7 +549,7 @@ void FunctionDifferenceEngine::runBlockDiff(BasicBlock::iterator LStart,
       {
         Instruction *L = &*LI, *R = &*RI;
         DifferenceEngine::Context C(Engine, L, R);
-        diff(L, R, false, true); // unify successors
+        diff(L, R, true, true); // complain and unify successors
         Values[L] = R; // make non-tentative
         Diff.addMatch(L, R);
       }