Reverse reversed_comparison_code_parts patch

[Jeffrey Oldham <oldham at codesourcery dot com>]

This patch reverses a patch that has broken mainline compilation on
mips-sgi-irix6.5 and arm-linux since 01 March.  See
http://gcc.gnu.org/ml/gcc-patches/2001-03/msg00660.html and
http://gcc.gnu.org/ml/gcc-patches/2001-03/msg00027.html.

2001-03-12  Jeffrey Oldham  <oldham@codesourcery.com>

	* jump.c (reversed_comparison_code_parts): Reverse Jan Hubricka's
	2001-02-28 patch because it breaks arm-linux and mips-sgi-irix6.5.

Tested on:	i686-pc-linux-gnu and mips-sgi-irix6.5
		): Bootstrapping is still broken by other changes. :(
Approved by:	Mark Mitchell (mark@codesourcery.com)

Thanks,
Jeffrey D. Oldham
oldham@codesourcery.com
Index: jump.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/jump.c,v
retrieving revision 1.158
diff -c -p -r1.158 jump.c
*** jump.c	2001/03/07 19:29:36	1.158
--- jump.c	2001/03/12 15:53:13
*************** reversed_comparison_code_parts (code, ar
*** 1782,1792 ****
        case UNLE:
        case UNGT:
        case UNGE:
! 	/* We don't have safe way to reverse these yet - we would need
! 	   ordered compares that may not trap.  */
! 	if (TARGET_FLOAT_FORMAT != IEEE_FLOAT_FORMAT
! 	    || flag_unsafe_math_optimizations)
! 	  return reverse_condition_maybe_unordered (code);
  	return UNKNOWN;
        default:
  	break;
--- 1782,1788 ----
        case UNLE:
        case UNGT:
        case UNGE:
! 	/* We don't have safe way to reverse these yet.  */
  	return UNKNOWN;
        default:
  	break;
*************** reversed_comparison_code_parts (code, ar
*** 1844,1855 ****
  	    return UNKNOWN;
  	}
      }
- 
-   /* In case of floating point modes, we may reverse here, since
-      we will be always converting an ordered compare to unordered.
-      The unsafe code has been caught earlier.  */
-   if (FLOAT_MODE_P (mode))
-     return reverse_condition_maybe_unordered (code);
  
    /* An integer condition.  */
    if (GET_CODE (arg0) == CONST_INT
--- 1840,1845 ----