re PR target/35225 (gcc segfaults when building GTK+ code with -O2 -fPIC for SH4)

	PR target/35225
	* config/sh/sh.c (find_barrier): Don't go past 'from' argument.

From-SVN: r132503

gcc/ChangeLog

 2008-02-20  Kaz Kojima  <kkojima@gcc.gnu.org>
 
+	PR target/35225
+	* config/sh/sh.c (find_barrier): Don't go past 'from' argument.
+
+2008-02-20  Kaz Kojima  <kkojima@gcc.gnu.org>
+
 	PR target/35190
 	* config/sh/sh.md (jump_compact): Disable for crossing jumps.
 

gcc/config/sh/sh.c

@@ -3838,6 +3838,7 @@ find_barrier (int num_mova, rtx mova, rtx from)
   rtx barrier_before_mova = 0, found_barrier = 0, good_barrier = 0;
   int si_limit;
   int hi_limit;
+  rtx orig = from;
 
   /* For HImode: range is 510, add 4 because pc counts from address of
      second instruction after this one, subtract 2 for the jump instruction
@@ -4070,7 +4071,8 @@ find_barrier (int num_mova, rtx mova, rtx from)
       /* If we exceeded the range, then we must back up over the last
 	 instruction we looked at.  Otherwise, we just need to undo the
 	 NEXT_INSN at the end of the loop.  */
-      if (count_hi > hi_limit || count_si > si_limit)
+      if (PREV_INSN (from) != orig
+	  && (count_hi > hi_limit || count_si > si_limit))
 	from = PREV_INSN (PREV_INSN (from));
       else
 	from = PREV_INSN (from);