[Bug rtl-optimization/66420] valgrind error in improve_allocation

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66420

--- Comment #5 from David Binderman <dcb314 at hotmail dot com> ---
Still wrong more than two years later

==15752== Conditional jump or move depends on uninitialised value(s)
==15752==    at 0x9CF7DC: improve_allocation() (in
/home/dcb/gcc/working/gcc/cc1)
==15752==    by 0x9D59F3: color_pass(ira_loop_tree_node*) (in
/home/dcb/gcc/working/gcc/cc1)
==15752==    by 0x9A92D6: ira_traverse_loop_tree(bool, ira_loop_tree_node*,
void (*)(ira_loop_tree_node*), void (*)(ira_loop_tree_node*)) (in
/home/dcb/gcc/working/gcc/cc1)
==15752==    by 0x9CBBDA: ira_color() (in /home/dcb/gcc/working/gcc/cc1)