aboutsummaryrefslogtreecommitdiffstats
path: root/lib/hipe
diff options
context:
space:
mode:
Diffstat (limited to 'lib/hipe')
-rw-r--r--lib/hipe/main/hipe.app.src1
-rw-r--r--lib/hipe/regalloc/hipe_regalloc_prepass.erl71
-rw-r--r--lib/hipe/util/Makefile2
-rw-r--r--lib/hipe/util/hipe_dsets.erl84
4 files changed, 98 insertions, 60 deletions
diff --git a/lib/hipe/main/hipe.app.src b/lib/hipe/main/hipe.app.src
index af2c02006d..4c3f147d40 100644
--- a/lib/hipe/main/hipe.app.src
+++ b/lib/hipe/main/hipe.app.src
@@ -83,6 +83,7 @@
hipe_digraph,
hipe_dominators,
hipe_dot,
+ hipe_dsets,
hipe_gen_cfg,
hipe_gensym,
hipe_graph_coloring_regalloc,
diff --git a/lib/hipe/regalloc/hipe_regalloc_prepass.erl b/lib/hipe/regalloc/hipe_regalloc_prepass.erl
index e212420ad2..5024840237 100644
--- a/lib/hipe/regalloc/hipe_regalloc_prepass.erl
+++ b/lib/hipe/regalloc/hipe_regalloc_prepass.erl
@@ -483,8 +483,8 @@ merge_pointless_splits_1([], _ScanBBs, DSets, Acc) -> {Acc, DSets};
merge_pointless_splits_1([P={_,{single,_}}|Ps], ScanBBs, DSets, Acc) ->
merge_pointless_splits_1(Ps, ScanBBs, DSets, [P|Acc]);
merge_pointless_splits_1([P0={L,{split,_,_}}|Ps], ScanBBs, DSets0, Acc) ->
- {EntryRoot, DSets1} = dsets_find({entry,L}, DSets0),
- {ExitRoot, DSets} = dsets_find({exit,L}, DSets1),
+ {EntryRoot, DSets1} = hipe_dsets:find({entry,L}, DSets0),
+ {ExitRoot, DSets} = hipe_dsets:find({exit,L}, DSets1),
case EntryRoot =:= ExitRoot of
false -> merge_pointless_splits_1(Ps, ScanBBs, DSets, [P0|Acc]);
true ->
@@ -501,7 +501,7 @@ merge_pointless_splits_1([P0={L,{split,_,_}}|Ps], ScanBBs, DSets0, Acc) ->
-spec merge_small_parts(bb_dsets()) -> {bb_dsets_rllist(), bb_dsets()}.
merge_small_parts(DSets0) ->
- {RLList, DSets1} = dsets_to_rllist(DSets0),
+ {RLList, DSets1} = hipe_dsets:to_rllist(DSets0),
RLLList = [{R, length(Elems), Elems} || {R, Elems} <- RLList],
merge_small_parts_1(RLLList, DSets1, []).
@@ -518,8 +518,8 @@ merge_small_parts_1([Fst,{R, L, Es}|Ps], DSets, Acc)
merge_small_parts_1([Fst|Ps], DSets, [{R,Es}|Acc]);
merge_small_parts_1([{R1,L1,Es1},{R2,L2,Es2}|Ps], DSets0, Acc) ->
?ASSERT(L1 < ?TUNE_TOO_FEW_BBS andalso L2 < ?TUNE_TOO_FEW_BBS),
- DSets1 = dsets_union(R1, R2, DSets0),
- {R, DSets} = dsets_find(R1, DSets1),
+ DSets1 = hipe_dsets:union(R1, R2, DSets0),
+ {R, DSets} = hipe_dsets:find(R1, DSets1),
merge_small_parts_1([{R,L2+L1,Es2++Es1}|Ps], DSets, Acc).
%% @doc Partition an ordering over BBs into subsequences for the dsets that
@@ -531,8 +531,8 @@ part_order(Lbs, DSets) -> part_order(Lbs, DSets, #{}).
part_order([], DSets, Acc) -> {Acc, DSets};
part_order([L|Ls], DSets0, Acc0) ->
- {EntryRoot, DSets1} = dsets_find({entry,L}, DSets0),
- {ExitRoot, DSets2} = dsets_find({exit,L}, DSets1),
+ {EntryRoot, DSets1} = hipe_dsets:find({entry,L}, DSets0),
+ {ExitRoot, DSets2} = hipe_dsets:find({exit,L}, DSets1),
Acc1 = map_append(EntryRoot, L, Acc0),
%% Only include the label once if both entry and exit is in same partition
Acc2 = case EntryRoot =:= ExitRoot of
@@ -558,73 +558,26 @@ map_append(Key, Elem, Map) ->
%% split point, and one from the end to the last split point.
-type bb_dset_key() :: {entry | exit, label()}.
--type bb_dsets() :: dsets(bb_dset_key()).
+-type bb_dsets() :: hipe_dsets:dsets(bb_dset_key()).
-type bb_dsets_rllist() :: [{bb_dset_key(), [bb_dset_key()]}].
-spec initial_dsets(target_cfg(), module(), target_context()) -> bb_dsets().
initial_dsets(CFG, TgtMod, TgtCtx) ->
Labels = TgtMod:labels(CFG, TgtCtx),
- DSets0 = dsets_new(lists:append([[{entry,L},{exit,L}] || L <- Labels])),
+ DSets0 = hipe_dsets:new(lists:append([[{entry,L},{exit,L}] || L <- Labels])),
Edges = lists:append([[{L, S} || S <- hipe_gen_cfg:succ(CFG, L)]
|| L <- Labels]),
- lists:foldl(fun({X, Y}, DS) -> dsets_union({exit,X}, {entry,Y}, DS) end,
+ lists:foldl(fun({X, Y}, DS) -> hipe_dsets:union({exit,X}, {entry,Y}, DS) end,
DSets0, Edges).
-spec join_whole_blocks(part_bb_list(), bb_dsets()) -> bb_dsets().
join_whole_blocks(PartBBList, DSets0) ->
- lists:foldl(fun({L, {single, _}}, DS) -> dsets_union({entry,L}, {exit,L}, DS);
+ lists:foldl(fun({L, {single, _}}, DS) ->
+ hipe_dsets:union({entry,L}, {exit,L}, DS);
({_, {split, _, _}}, DS) -> DS
end, DSets0, PartBBList).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%% The disjoint set forests data structure, for elements of arbitrary types.
-%% Note that the find operation mutates the set.
-%%
-%% We could do this more efficiently if we restricted the elements to integers,
-%% and used the (mutable) hipe arrays. For arbitrary terms ETS could be used,
-%% for a persistent interface (which isn't that nice when even accessors return
-%% modified copies), the array module could be used.
--type dsets(X) :: #{X => {node, X} | {root, non_neg_integer()}}.
-
--spec dsets_new([E]) -> dsets(E).
-dsets_new(Elems) -> maps:from_list([{E,{root,0}} || E <- Elems]).
-
--spec dsets_find(E, dsets(E)) -> {E, dsets(E)}.
-dsets_find(E, DS0) ->
- case DS0 of
- #{E := {root,_}} -> {E, DS0};
- #{E := {node,N}} ->
- case dsets_find(N, DS0) of
- {N, _}=T -> T;
- {R, DS1} -> {R, DS1#{E := {node,R}}}
- end
- ;_ -> error(badarg, [E, DS0])
- end.
-
--spec dsets_union(E, E, dsets(E)) -> dsets(E).
-dsets_union(X, Y, DS0) ->
- {XRoot, DS1} = dsets_find(X, DS0),
- case dsets_find(Y, DS1) of
- {XRoot, DS2} -> DS2;
- {YRoot, DS2} ->
- #{XRoot := {root,XRR}, YRoot := {root,YRR}} = DS2,
- if XRR < YRR -> DS2#{XRoot := {node,YRoot}};
- XRR > YRR -> DS2#{YRoot := {node,XRoot}};
- true -> DS2#{YRoot := {node,XRoot}, XRoot := {root,XRR+1}}
- end
- end.
-
--spec dsets_to_rllist(dsets(E)) -> {[{Root::E, Elems::[E]}], dsets(E)}.
-dsets_to_rllist(DS0) ->
- {Lists, DS} = dsets_to_rllist(maps:keys(DS0), #{}, DS0),
- {maps:to_list(Lists), DS}.
-
-dsets_to_rllist([], Acc, DS) -> {Acc, DS};
-dsets_to_rllist([E|Es], Acc, DS0) ->
- {ERoot, DS} = dsets_find(E, DS0),
- dsets_to_rllist(Es, map_append(ERoot, E, Acc), DS).
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Third pass
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Collect all referenced temps in each partition.
diff --git a/lib/hipe/util/Makefile b/lib/hipe/util/Makefile
index 04de7f7823..eeb81ac482 100644
--- a/lib/hipe/util/Makefile
+++ b/lib/hipe/util/Makefile
@@ -48,7 +48,7 @@ HIPE_MODULES = hipe_vectors
else
HIPE_MODULES =
endif
-MODULES = hipe_timing hipe_dot hipe_digraph $(HIPE_MODULES)
+MODULES = hipe_timing hipe_dot hipe_digraph hipe_dsets $(HIPE_MODULES)
HRL_FILES=
ERL_FILES= $(MODULES:%=%.erl)
diff --git a/lib/hipe/util/hipe_dsets.erl b/lib/hipe/util/hipe_dsets.erl
new file mode 100644
index 0000000000..9492cab0ff
--- /dev/null
+++ b/lib/hipe/util/hipe_dsets.erl
@@ -0,0 +1,84 @@
+%% -*- erlang-indent-level: 2 -*-
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%% http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%@doc
+%% IMMUTABLE DISJOINT SETS OF ARBITRARY TERMS
+%%
+%% The disjoint set forests data structure, for elements of arbitrary types.
+%% Note that the find operation mutates the set.
+%%
+%% We could do this more efficiently if we restricted the elements to integers,
+%% and used the (mutable) hipe arrays. For arbitrary terms ETS could be used,
+%% for a persistent interface (which isn't that nice when even accessors return
+%% modified copies), the array module could be used.
+-module(hipe_dsets).
+
+-export([new/1, find/2, union/3, to_map/1, to_rllist/1]).
+-export_type([dsets/1]).
+
+-opaque dsets(X) :: #{X => {node, X} | {root, non_neg_integer()}}.
+
+-spec new([E]) -> dsets(E).
+new(Elems) -> maps:from_list([{E,{root,0}} || E <- Elems]).
+
+-spec find(E, dsets(E)) -> {E, dsets(E)}.
+find(E, DS0) ->
+ case DS0 of
+ #{E := {root,_}} -> {E, DS0};
+ #{E := {node,N}} ->
+ case find(N, DS0) of
+ {N, _}=T -> T;
+ {R, DS1} -> {R, DS1#{E := {node,R}}}
+ end;
+ _ -> error(badarg, [E, DS0])
+ end.
+
+-spec union(E, E, dsets(E)) -> dsets(E).
+union(X, Y, DS0) ->
+ {XRoot, DS1} = find(X, DS0),
+ case find(Y, DS1) of
+ {XRoot, DS2} -> DS2;
+ {YRoot, DS2} ->
+ #{XRoot := {root,XRR}, YRoot := {root,YRR}} = DS2,
+ if XRR < YRR -> DS2#{XRoot := {node,YRoot}};
+ XRR > YRR -> DS2#{YRoot := {node,XRoot}};
+ true -> DS2#{YRoot := {node,XRoot}, XRoot := {root,XRR+1}}
+ end
+ end.
+
+-spec to_map(dsets(E)) -> {#{Elem::E => Root::E}, dsets(E)}.
+to_map(DS) ->
+ to_map(maps:keys(DS), DS, #{}).
+
+to_map([], DS, Acc) -> {Acc, DS};
+to_map([K|Ks], DS0, Acc) ->
+ {KR, DS} = find(K, DS0),
+ to_map(Ks, DS, Acc#{K => KR}).
+
+-spec to_rllist(dsets(E)) -> {[{Root::E, Elems::[E]}], dsets(E)}.
+to_rllist(DS0) ->
+ {Lists, DS} = to_rllist(maps:keys(DS0), #{}, DS0),
+ {maps:to_list(Lists), DS}.
+
+to_rllist([], Acc, DS) -> {Acc, DS};
+to_rllist([E|Es], Acc, DS0) ->
+ {ERoot, DS} = find(E, DS0),
+ to_rllist(Es, map_append(ERoot, E, Acc), DS).
+
+map_append(Key, Elem, Map) ->
+ case Map of
+ #{Key := List} -> Map#{Key := [Elem|List]};
+ #{} -> Map#{Key => [Elem]}
+ end.
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-18 02:13:00 +0000