Re: PATCH to expand_end_loop for better optimization

[Jeffrey A Law <law at cygnus dot com>]

  In message <199807170709.AAA02089@smtp.earthlink.net>you write:
  > 
  > The expand_end_loop function attempts to move exit tests to the end of
  > loops.  This allows duplicate_loop_exit_test to duplicate the test.
  > The point of all this is that then (at least the first) instructions
  > in the loop body itself are guaranteed to be executed, which allows
  > the loop optimizer to move more code out of loops.
  > 
  > However, expand_end_loop was, for some reason, refusing to treat
  > unconditional jumps out of the loop as part of the exit test, once 
  > it had seen a conditional jump.  I corrected this, and cleaned up the
  > code a bit as well.
  > 
[ ... ]

  > Fri Jul 17 00:03:45 1998  Mark Mitchell  <mark@markmitchell.com>
  > 
  > 	* stmt.c (expand_end_loop): Tidy.  Allow unconditional
  > 	jumps out of the loop to be treated as part of the exit test.
Thanks.  I've installed this into the mainline tree.

jeff