* the register allocator always knows the exact number of the first imaginary

    supreg of the current register type, so use that rather than the maximum of
    all possible register types

git-svn-id: trunk@21623 -

compiler/rgobj.pas

@@ -1371,7 +1371,7 @@ unit rgobj;
           n:=coalescednodes.buf^[i-1];
           k:=get_alias(n);
           reginfo[n].colour:=reginfo[k].colour;
-          if reginfo[k].colour<maxcpuregister then
+          if reginfo[k].colour<first_imaginary then
             include(used_in_proc,reginfo[k].colour);
         end;
     end;
@@ -1567,6 +1567,7 @@ unit rgobj;
         p:=headertai;
         while assigned(p) do
           begin
+            prefetch(pointer(p.next)^);
             if p.typ=ait_regalloc then
               with Tai_regalloc(p) do
                 begin
@@ -1632,6 +1633,7 @@ unit rgobj;
         p:=Tai(list.first);
         while assigned(p) do
           begin
+            prefetch(pointer(p.next)^);
             case p.typ of
               ait_regalloc:
                 with Tai_regalloc(p) do