[PATCH] Dispose of non-gimplifier users of is_gimple_tmp_var

[Nathanael Nerode]

Both of these uses appear to be an attempt to retain better debugging
information.  Accordingly, they are checking the wrong thing.

Currently bootstrapping.
If successful with no regressions, OK to commit?

	* tree-ssa-copyrename.c (copy_rename_partition_coalesce):
	Check for arificial variables, not is_gimple_tmp_var.
	* tree-ssa-live.c (var_union): Likewise.

Index: tree-ssa-copyrename.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/tree-ssa-copyrename.c,v
retrieving revision 2.8
diff -u -p -r2.8 tree-ssa-copyrename.c
--- tree-ssa-copyrename.c	28 Jul 2004 05:13:08 -0000	2.8
+++ tree-ssa-copyrename.c	16 Aug 2004 11:43:51 -0000
@@ -195,8 +195,8 @@ copy_rename_partition_coalesce (var_map 
       return;
     }
 
-  gimp1 = is_gimple_tmp_var (root1);
-  gimp2 = is_gimple_tmp_var (root2);
+  gimp1 = (TREE_CODE (root1) == VAR_DECL && DECL_ARTIFICAL(root1))
+  gimp2 = (TREE_CODE (root2) == VAR_DECL && DECL_ARTIFICAL(root2))
 
   /* Never attempt to coalesce 2 user variables unless one is an inline 
      variable.  */
Index: tree-ssa-live.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/tree-ssa-live.c,v
retrieving revision 2.13
diff -u -p -r2.13 tree-ssa-live.c
--- tree-ssa-live.c	9 Aug 2004 19:13:07 -0000	2.13
+++ tree-ssa-live.c	16 Aug 2004 11:43:52 -0000
@@ -135,7 +135,8 @@ var_union (var_map map, tree var1, tree 
 
       /* If there is no root_var set, or its not a user variable, set the
 	 root_var to this one.  */
-      if (!root_var || is_gimple_tmp_var (root_var))
+      if (!root_var
+          || (TREE_CODE(root_var) == VAR_DECL && DECL_ARTIFICAL(root_var)))
         {
 	  other_var = root_var;
 	  root_var = var2;

-- 
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