From 5c2dad487e6af1a48fa3a1f3d985b6b891788bde Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Thu, 10 May 2012 12:09:07 +0200 Subject: Remove stale code for hybrid heap and incremental GC The hybrid heap emulator was last working in the non-SMP R11B run-time system. When the constant pools were introduced in R12B, the hybrid heap emulator was not updated to handle them. At this point, the harm from reduced readability of the code is greater than any potential usefulness of keeping the code. --- lib/hipe/cerl/cerl_hybrid_transform.erl | 153 -------------------------------- 1 file changed, 153 deletions(-) delete mode 100644 lib/hipe/cerl/cerl_hybrid_transform.erl (limited to 'lib/hipe/cerl/cerl_hybrid_transform.erl') diff --git a/lib/hipe/cerl/cerl_hybrid_transform.erl b/lib/hipe/cerl/cerl_hybrid_transform.erl deleted file mode 100644 index b248b0ccd0..0000000000 --- a/lib/hipe/cerl/cerl_hybrid_transform.erl +++ /dev/null @@ -1,153 +0,0 @@ -%% -%% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2004-2009. All Rights Reserved. -%% -%% The contents of this file are subject to the Erlang Public License, -%% Version 1.1, (the "License"); you may not use this file except in -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved online at http://www.erlang.org/. -%% -%% Software distributed under the License is distributed on an "AS IS" -%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See -%% the License for the specific language governing rights and limitations -%% under the License. -%% -%% %CopyrightEnd% -%% - --module(cerl_hybrid_transform). - -%% Use compile option `{core_transform, cerl_hybrid_transform}' to -%% insert this as a compilation pass. - --export([transform/2, core_transform/2]). - --spec core_transform(cerl:cerl(), [term()]) -> cerl:cerl(). - -core_transform(Code, Opts) -> - cerl:to_records(transform(cerl:from_records(Code), Opts)). - --spec transform(cerl:cerl(), [term()]) -> cerl:cerl(). - -transform(Code, _Opts) -> - Code0 = cerl_trees:map(fun unfold_literal/1, Code), - {Code1, _} = cerl_trees:label(Code0), - io:fwrite("Running hybrid heap analysis..."), - {T1,_} = statistics(runtime), - {Code2, _, Vars} = cerl_messagean:annotate(Code1), - {T2,_} = statistics(runtime), - io:fwrite("(~w ms), transform...", [T2 - T1]), - Code3 = rewrite(Code2, Vars), - io:fwrite("done.\n"), - cerl_trees:map(fun fold_literal/1, Code3). - -unfold_literal(T) -> - cerl:unfold_literal(T). - -fold_literal(T) -> - cerl:fold_literal(T). - -%% If escape-annotated: -%% {...} => hybrid:tuple([...]) -%% [H | T] => hybrid:cons(H, T) -%% -%% Wrapper for args to hybrid:cons/hybrid:tuple that may need copying: -%% hybrid:copy(A) - -rewrite(Node, Vars) -> - case cerl:type(Node) of - tuple -> - Es = rewrite_list(cerl:tuple_es(Node), Vars), - case is_escaping(Node) of - false -> - cerl:update_c_tuple(Node, Es); - true -> - Es1 = wrap(Es, Node, Vars), - cerl:update_c_call(Node, - cerl:abstract(hybrid), - cerl:abstract(tuple), - [cerl:make_list(Es1)]) -%%% cerl:update_c_call(Node, cerl:abstract(hybrid), -%%% cerl:abstract(tuple), Es1) - end; - cons -> - H = rewrite(cerl:cons_hd(Node), Vars), - T = rewrite(cerl:cons_tl(Node), Vars), - case is_escaping(Node) of - false -> - cerl:update_c_cons(Node, H, T); - true -> - Es = wrap([H, T], Node, Vars), - cerl:update_c_call(Node, - cerl:abstract(hybrid), - cerl:abstract(cons), - Es) - end; -%%% call -> -%%% M = rewrite(cerl:call_module(Node)), -%%% F = rewrite(cerl:call_name(Node)), -%%% As = rewrite_list(cerl:call_args(Node)), -%%% case cerl:is_c_atom(M) andalso cerl:is_c_atom(F) of -%%% true -> -%%% case {cerl:atom_val(M), cerl:atom_val(F), length(As)} of -%%% {erlang, '!', 2} -> -%%% cerl:update_c_call(Node, -%%% cerl:abstract(hipe_bifs), -%%% cerl:abstract(send), -%%% [cerl:make_list(As)]); -%%% _ -> -%%% cerl:update_c_call(Node, M, F, As) -%%% end; -%%% false -> -%%% cerl:update_c_call(Node, M, F, As) -%%% end; - clause -> - B = rewrite(cerl:clause_body(Node), Vars), - cerl:update_c_clause(Node, cerl:clause_pats(Node), - cerl:clause_guard(Node), B); - primop -> - case cerl:atom_val(cerl:primop_name(Node)) of - match_fail -> - Node; - _ -> - As = rewrite_list(cerl:primop_args(Node), Vars), - cerl:update_c_primop(Node, cerl:primop_name(Node), As) - end; - _T -> - case cerl:subtrees(Node) of - [] -> - Node; - Gs -> - cerl:update_tree(Node, [rewrite_list(Ns, Vars) - || Ns <- Gs]) - end - end. - -rewrite_list([N | Ns], Vars) -> - [rewrite(N, Vars) | rewrite_list(Ns, Vars)]; -rewrite_list([], _) -> - []. - -is_escaping(T) -> - lists:member(escapes, cerl:get_ann(T)). - -wrap(Es, Node, Vars) -> - L = cerl_trees:get_label(Node), - Xs = dict:fetch(L, Vars), - wrap(Es, Xs). - -wrap([E | Es], [{S, _} | Xs]) -> - case ordsets:is_element(unsafe, S) of -%% case cerl:type(E) =/= literal of - true -> - [cerl:c_call(cerl:abstract(hybrid), - cerl:abstract(copy), - [E]) - | wrap(Es, Xs)]; - false -> - [E | wrap(Es, Xs)] - end; -wrap([], _) -> - []. -- cgit v1.2.3