Revert "Fix for PR6953: per gcc, regparm and noreturn affect the compatibility of", it is breaking the builds of quite a few projects (emacs, dovecot, gnutar, bison).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102501 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed