Reverted: Track validity of pass results

Commits r291882 and related r291887.

llvm-svn: 292062
diff --git a/llvm/lib/CodeGen/MachineDominators.cpp b/llvm/lib/CodeGen/MachineDominators.cpp
index a548480..303a6a9 100644
--- a/llvm/lib/CodeGen/MachineDominators.cpp
+++ b/llvm/lib/CodeGen/MachineDominators.cpp
@@ -69,7 +69,7 @@
 }
 
 void MachineDominatorTree::verifyAnalysis() const {
-  if (VerifyMachineDomInfo && isExecuted())
+  if (VerifyMachineDomInfo)
     verifyDomTree();
 }