Re: tree-ssa*: reduce malloc() calls by preallocating hot VECs on the stack

[Richard Guenther <richard dot guenther at gmail dot com>]

On Mon, Aug 22, 2011 at 9:43 AM, Dimitrios Apostolou <jimis@gmx.net> wrote:
>
> 2011-08-22 ?Dimitrios Apostolou ?<jimis@gmx.net>
>
> ? ? ? ?Allocate some very frequently used vectors on the stack:
> ? ? ? ?* vecir.h: Defined a tree vector on the stack.
> ? ? ? ?* tree-ssa-sccvn.c (print_scc, sort_scc, process_scc)
> ? ? ? ?(extract_and_process_scc_for_name): Allocate the scc vector on the
> ? ? ? ?stack instead of the heap, giving it a minimal initial size
> ? ? ? ?instead of 0.
> ? ? ? ?* tree-ssa-structalias.c (get_constraint_for_1)
> ? ? ? ?(get_constraint_for, get_constraint_for_rhs, do_deref)
> ? ? ? ?(get_constraint_for_ssa_var, get_constraint_for_ptr_offset)
> ? ? ? ?(get_constraint_for_component_ref, get_constraint_for_address_of)
> ? ? ? ?(process_all_all_constraints, do_structure_copy)
> ? ? ? ?(make_constraints_to, make_constraint_to, handle_rhs_call)
> ? ? ? ?(handle_lhs_call, handle_const_call, handle_pure_call)
> ? ? ? ?(find_func_aliases_for_builtin_call, find_func_aliases_for_call)
> ? ? ? ?(find_func_aliases, process_ipa_clobber, find_func_clobbers)
> ? ? ? ?(create_variable_info_for): Converted the rhsc, lhsc vectors from
> ? ? ? ?heap to stack, with a minimal initial size, since they were very
> ? ? ? ?frequently allocated.

Ok if bootstrapped and tested ok - please always state how you tested
a patch.

Thanks,
Richard.