re PR middle-end/33318 (fortran/expr.c:305: internal compiler error: internal consistency failure)

	PR target/33318
	* cse.c (fold_rtx): Avoid invalid sharing.

From-SVN: r128187

gcc/ChangeLog

+2007-09-06  Jan Hubicka  <jh@suse.cz>
+
+	PR target/33318
+	* cse.c (fold_rtx): Avoid invalid sharing.
+
 2007-09-06  Richard Sandiford  <richard@codesourcery.com>
 
 	* config/mips/mips.md (fixuns_truncdfsi2, fixuns_truncdfdi2)

gcc/cse.c

@@ -3246,7 +3246,8 @@ fold_rtx (rtx x, rtx insn)
 		      /* If we have a cheaper expression now, use that
 			 and try folding it further, from the top.  */
 		      if (cheapest_simplification != x)
-			return fold_rtx (cheapest_simplification, insn);
+			return fold_rtx (copy_rtx (cheapest_simplification),
+					 insn);
 		    }
 		}