tree-ssa-loop-ivopts.c (computation_cost): Start register numbering at…

tree-ssa-loop-ivopts.c (computation_cost): Start register numbering at LAST_VIRTUAL_REGISTER+1 to avoid possibly using...

* tree-ssa-loop-ivopts.c (computation_cost): Start register
numbering at LAST_VIRTUAL_REGISTER+1 to avoid possibly using hard
registers in unsupported ways.
* expmed.c (init_expmed): Likewise.

From-SVN: r95373

gcc/ChangeLog

+2005-02-21  DJ Delorie  <dj@redhat.com>
+
+	* tree-ssa-loop-ivopts.c (computation_cost): Start register
+	numbering at LAST_VIRTUAL_REGISTER+1 to avoid possibly using hard
+	registers in unsupported ways.
+	* expmed.c (init_expmed): Likewise.
+	
 2005-02-21  Stan Cox  <scox@redhat.com>
 
 	* config/iq2000/iq2000.h (DWARF_FRAME_RETURN_COLUMN): Change to 31.

gcc/expmed.c

@@ -145,7 +145,8 @@ init_expmed (void)
   memset (&all, 0, sizeof all);
 
   PUT_CODE (&all.reg, REG);
-  REGNO (&all.reg) = 10000;
+  /* Avoid using hard regs in ways which may be unsupported.  */
+  REGNO (&all.reg) = LAST_VIRTUAL_REGISTER + 1;
 
   PUT_CODE (&all.plus, PLUS);
   XEXP (&all.plus, 0) = &all.reg;

gcc/tree-ssa-loop-ivopts.c

@@ -2427,7 +2427,8 @@ computation_cost (tree expr)
   rtx seq, rslt;
   tree type = TREE_TYPE (expr);
   unsigned cost;
-  int regno = 0;
+  /* Avoid using hard regs in ways which may be unsupported.  */
+  int regno = LAST_VIRTUAL_REGISTER + 1;
 
   walk_tree (&expr, prepare_decl_rtl, &regno, NULL);
   start_sequence ();