Move new assert to correct location

This assert was meant to execute at the end of parseMetadata, but
we return early and never reach the end of the function. Caught
by a compile-time warning since the function doesn't return a value
from that location.

llvm-svn: 253762

llvm/lib/Bitcode/Reader/BitcodeReader.cpp

@@ -1967,6 +1967,9 @@ std::error_code BitcodeReader::parseMetadata(bool ModuleLevel) {
       return error("Malformed block");
     case BitstreamEntry::EndBlock:
       MDValueList.tryToResolveCycles();
+      assert((!(ModuleLevel && SeenModuleValuesRecord) ||
+              NumModuleMDs == MDValueList.size()) &&
+             "Inconsistent bitcode: METADATA_VALUES mismatch");
       return std::error_code();
     case BitstreamEntry::Record:
       // The interesting case.
@@ -2396,9 +2399,6 @@ std::error_code BitcodeReader::parseMetadata(bool ModuleLevel) {
     }
     }
   }
-  assert((!(ModuleLevel && SeenModuleValuesRecord) ||
-          NumModuleMDs == MDValueList.size()) &&
-         "Inconsistent bitcode: METADATA_VALUES mismatch");
 #undef GET_OR_DISTINCT
 }