re PR rtl-optimization/17625 (ICE on legal (doloop creates shared RTL))

	PR rtl-optimization/17625
	* loop-doloop.c (doloop_modify): Unshare rtl before emitting it.

From-SVN: r88038

gcc/ChangeLog

+2004-09-24  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>
+
+	PR rtl-optimization/17625
+	* loop-doloop.c (doloop_modify): Unshare rtl before emitting it.
+
 2004-09-24  Andrew Pinski  <pinskia@physics.uc.edu>
 
 	PR tree-opt/17624

gcc/loop-doloop.c

@@ -292,7 +292,7 @@ doloop_modify (struct loop *loop, struct niter_desc *desc,
   if (GET_CODE (counter_reg) == PLUS)
     counter_reg = XEXP (counter_reg, 0);
 
-  count = desc->niter_expr;
+  count = copy_rtx (desc->niter_expr);
   increment_count = false;
   switch (GET_CODE (condition))
     {
@@ -345,7 +345,7 @@ doloop_modify (struct loop *loop, struct niter_desc *desc,
 
   if (desc->noloop_assumptions)
     {
-      rtx ass = desc->noloop_assumptions;
+      rtx ass = copy_rtx (desc->noloop_assumptions);
       basic_block preheader = loop_preheader_edge (loop)->src;
       basic_block set_zero
 	      = loop_split_edge_with (loop_preheader_edge (loop), NULL_RTX);