What happened to -frename-registers?

[David Edelsohn]

	The -frename-registers option was disabled because it exposed
bugs.  You can look at the original discussion to find more details.

2004-04-20  Paolo Bonzini  <bonzini@gnu.org>

        Revert part of 2004-04-17 change that moved -frename-registers
        to -O1.  -frename-registers is buggy.

        * toplev.c (flag_rename_registers): Initialize to 0.
        * doc/invoke.texi (Optimize options): Move -frename-registers
        to "Not triggered by any -O level" section.  Adjust commentary
        accordingly.


David