Re: Bug in recent submission

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

Thanks.  I've installed this patch.

  In message <vyzbtfgqgtg.fsf@issan.cs.uni-dortmund.de>you write:
  > Ok, I think I do now understand what's going on here.  The patch below
  > will fix the ICE, and does not create any regressions, as far as i can
  > see.
  > 
[ ... ]
  > 
  > Andreas.
  > 
  > 
  > 1999-05-19  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de>
  > 
  > 	* fold-const.c (fold_truthop): Make the field reference unsigned
  > 	when converting a single bit compare.
  > 
  > --- egcs-2.93/gcc/fold-const.c.~1~	Wed May 19 19:54:59 1999
  > +++ egcs-2.93/gcc/fold-const.c	Wed May 19 19:06:49 1999
  > @@ -3806,11 +3806,10 @@
  >      {
  >        if (l_const && integer_zerop (l_const) && integer_pow2p (ll_mask))
  >  	{
  > -	  /* Do not sign extend the constant here.  The left operand
  > -	     is either always unsigned or there is a BIT_AND_EXPR that
  > -	     masks out the extension bits.  */
  > -	  if (!	(ll_unsignedp || ll_and_mask != 0))
  > -	    abort ();
  > +	  /* Make the left operand unsigned, since we are only interested
  > +	     in the value of one bit.  Otherwise we are doing the wrong
  > +	     thing below.  */
  > +	  ll_unsignedp = 1;
  >  	  l_const = ll_mask;
  >  	}
  >        else
  > @@ -3822,8 +3821,7 @@
  >      {
  >        if (r_const && integer_zerop (r_const) && integer_pow2p (rl_mask))
  >  	{
  > -	  if (!	(rl_unsignedp || rl_and_mask != 0))
  > -	    abort ();
  > +	  rl_unsignedp = 1;
  >  	  r_const = rl_mask;
  >  	}
  >        else