[Bug other/80050] New: gcc/genmatch.c: PVS-Studio: V590

["khandeliants at viva64 dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80050

            Bug ID: 80050
           Summary: gcc/genmatch.c: PVS-Studio: V590
           Product: gcc
           Version: 7.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: khandeliants at viva64 dot com
  Target Milestone: ---

We have found a bug using PVS-Studio tool. PVS-Studio is a static code analyzer
for C, C++ and C#: https://www.viva64.com/en/pvs-studio/

Analyzer warning: V590 Consider inspecting this expression. The expression is
excessive or contains a misprint. genmatch.c 3829

const cpp_token * parser::next ()
{
  const cpp_token *token;
  do
  {
    token = cpp_get_token (r);
  }
  while (   token->type == CPP_PADDING
         && token->type != CPP_EOF);    // <=
  return token;
}