egcs-1.1.1 issues

[Jeffrey A Law]

  In message <m0zZ41Y-0000V4C@sea.lucon.org>you write:
  > Ooops. How about this one?
  > 
  > Thanks.
  > 
  > -- 
  > H.J. Lu (hjl@gnu.org)
  > ---
  > Thu Oct 29 18:09:05 1998  H.J. Lu  <hjl@gnu.org>
  > 
  > 	* jump.c (find_cross_jump): Don't do cross jump if 2 INSNs are
  > 	in differeten EH regions.
How about this instead.  Simpler & faster.  Fixes the 3 bug reports I can
find on this problem.  I'll check a less conservative version into the
mainline tree.

	* jump.c (jump_optimize): Initialize mappings from INSN_UID to
	EH region if exceptions are enabled and we're performing cross
	jump optimizations.
	(find_cross_jump): Exit loop if the insns are in different EH regions.
	
Index: jump.c
===================================================================
RCS file: /egcs/carton/cvsfiles/egcs/gcc/jump.c,v
retrieving revision 1.34.2.1
diff -c -3 -p -r1.34.2.1 jump.c
*** jump.c	1998/07/21 05:03:40	1.34.2.1
--- jump.c	1998/10/31 07:36:42
*************** jump_optimize (f, cross_jump, noop_moves
*** 182,187 ****
--- 182,193 ----
  
    max_uid++;
  
+   /* If we are performing cross jump optimizations, then initialize
+      tables mapping UIDs to EH regions to avoid incorrect movement
+      of insns from one EH region to another.  */
+   if (flag_exceptions && cross_jump)
+     init_insn_eh_region (f, max_uid);
+ 
    /* Delete insns following barriers, up to next label.  */
  
    for (insn = f; insn;)
*************** find_cross_jump (e1, e2, minimum, f1, f2
*** 2706,2711 ****
--- 2712,2724 ----
  	}
  
        if (i2 == 0 || GET_CODE (i1) != GET_CODE (i2))
+ 	break;
+ 
+       /* Avoid moving insns across EH regions. 
+ 
+ 	 ??? This is only necessary if i1 or i2 can throw an exception.  */
+       if (flag_exceptions
+ 	  && !in_same_eh_region (i1, i2))
  	break;
  
        p1 = PATTERN (i1);