Don't call doFinalization from verifyFunction.

verifyFunction needs to call doInitialization to collect metadata and avoid
crashing when verifying debug info in a function.

But it should not call doFinalization since that is where the verifier will
check declarations, variables and aliases, which is not desirable when one
only wants to verify a function.

A possible cleanup would be to split the class into a ModuleVerifier and
FunctionVerifier.

Issue reported by Ilia Filippov. Patch by Michael Kruse.

llvm-svn: 194574

llvm/lib/IR/Verifier.cpp

@@ -2402,7 +2402,6 @@ bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) {
   FPM.add(V);
   FPM.doInitialization();
   FPM.run(F);
-  FPM.doFinalization();
   return V->Broken;
 }