aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorBjörn Gustavsson <[email protected]>2018-02-16 12:36:39 +0100
committerGitHub <[email protected]>2018-02-16 12:36:39 +0100
commit7304c1e1deed6ac1fbddc88ea5c6d5138231dbf7 (patch)
tree5e258ca6f03d49fcff9bce690cd6c444029a07fe
parent9e7b328be93eccaabaf22ff8081772031731026e (diff)
parent260d530946fd3eb2e2d7e74465a5095d35822128 (diff)
downloadotp-7304c1e1deed6ac1fbddc88ea5c6d5138231dbf7.tar.gz
otp-7304c1e1deed6ac1fbddc88ea5c6d5138231dbf7.tar.bz2
otp-7304c1e1deed6ac1fbddc88ea5c6d5138231dbf7.zip
Merge pull request #1700 from bjorng/bjorn/compiler/beam_block
Combine blocks when running beam_block the second time
-rw-r--r--lib/compiler/src/beam_block.erl23
-rw-r--r--lib/compiler/src/beam_clean.erl21
-rw-r--r--lib/compiler/src/beam_flatten.erl3
-rw-r--r--lib/compiler/src/beam_split.erl7
4 files changed, 38 insertions, 16 deletions
diff --git a/lib/compiler/src/beam_block.erl b/lib/compiler/src/beam_block.erl
index 7183381334..47a2be8ab5 100644
--- a/lib/compiler/src/beam_block.erl
+++ b/lib/compiler/src/beam_block.erl
@@ -36,13 +36,11 @@ module({Mod,Exp,Attr,Fs0,Lc}, Opts) ->
function({function,Name,Arity,CLabel,Is0}, Blockify) ->
try
%% Collect basic blocks and optimize them.
- Is2 = case Blockify of
- true ->
- Is1 = blockify(Is0),
- embed_lines(Is1);
- false ->
- Is0
+ Is1 = case Blockify of
+ false -> Is0;
+ true -> blockify(Is0)
end,
+ Is2 = embed_lines(Is1),
Is3 = local_cse(Is2),
Is4 = beam_utils:anno_defs(Is3),
Is5 = move_allocates(Is4),
@@ -139,6 +137,11 @@ embed_lines([{block,B2},{line,_}=Line,{block,B1}|T], Acc) ->
embed_lines([{block,B1},{line,_}=Line|T], Acc) ->
B = {block,[{set,[],[],Line}|B1]},
embed_lines([B|T], Acc);
+embed_lines([{block,B2},{block,B1}|T], Acc) ->
+ %% This can only happen when beam_block is run for
+ %% the second time.
+ B = {block,B1++B2},
+ embed_lines([B|T], Acc);
embed_lines([I|Is], Acc) ->
embed_lines(Is, [I|Acc]);
embed_lines([], Acc) -> Acc.
@@ -628,7 +631,13 @@ cse_find(Expr, Es) ->
end.
cse_expr({set,[D],Ss,{bif,N,_}}) ->
- {ok,D,{{bif,N},Ss}};
+ case D of
+ {fr,_} ->
+ %% There are too many things that can go wrong.
+ none;
+ _ ->
+ {ok,D,{{bif,N},Ss}}
+ end;
cse_expr({set,[D],Ss,{alloc,_,{gc_bif,N,_}}}) ->
{ok,D,{{gc_bif,N},Ss}};
cse_expr({set,[D],Ss,put_list}) ->
diff --git a/lib/compiler/src/beam_clean.erl b/lib/compiler/src/beam_clean.erl
index e094c2c320..7ddf9fa2e2 100644
--- a/lib/compiler/src/beam_clean.erl
+++ b/lib/compiler/src/beam_clean.erl
@@ -24,7 +24,7 @@
-export([module/2]).
-export([bs_clean_saves/1]).
-export([clean_labels/1]).
--import(lists, [foldl/3,reverse/1,filter/2]).
+-import(lists, [foldl/3,reverse/1]).
-spec module(beam_utils:module_code(), [compile:option()]) ->
{'ok',beam_utils:module_code()}.
@@ -303,8 +303,21 @@ maybe_remove_lines(Fs, Opts) ->
end.
remove_lines([{function,N,A,Lbl,Is0}|T]) ->
- Is = filter(fun({line,_}) -> false;
- (_) -> true
- end, Is0),
+ Is = remove_lines_fun(Is0),
[{function,N,A,Lbl,Is}|remove_lines(T)];
remove_lines([]) -> [].
+
+remove_lines_fun([{line,_}|Is]) ->
+ remove_lines_fun(Is);
+remove_lines_fun([{block,Bl0}|Is]) ->
+ Bl = remove_lines_block(Bl0),
+ [{block,Bl}|remove_lines_fun(Is)];
+remove_lines_fun([I|Is]) ->
+ [I|remove_lines_fun(Is)];
+remove_lines_fun([]) -> [].
+
+remove_lines_block([{set,_,_,{line,_}}|Is]) ->
+ remove_lines_block(Is);
+remove_lines_block([I|Is]) ->
+ [I|remove_lines_block(Is)];
+remove_lines_block([]) -> [].
diff --git a/lib/compiler/src/beam_flatten.erl b/lib/compiler/src/beam_flatten.erl
index 4045ab6dc5..c60211f516 100644
--- a/lib/compiler/src/beam_flatten.erl
+++ b/lib/compiler/src/beam_flatten.erl
@@ -73,7 +73,8 @@ norm({set,[D],[S|Puts],{alloc,R,{put_map,Op,F}}}) ->
{put_map,F,Op,S,D,R,{list,Puts}};
norm({set,[],[],remove_message}) -> remove_message;
norm({set,[],[],fclearerror}) -> fclearerror;
-norm({set,[],[],fcheckerror}) -> {fcheckerror,{f,0}}.
+norm({set,[],[],fcheckerror}) -> {fcheckerror,{f,0}};
+norm({set,[],[],{line,_}=Line}) -> Line.
norm_allocate({_Zero,nostack,Nh,[]}, Regs) ->
[{test_heap,Nh,Regs}];
diff --git a/lib/compiler/src/beam_split.erl b/lib/compiler/src/beam_split.erl
index d041f18806..52dd89b5bb 100644
--- a/lib/compiler/src/beam_split.erl
+++ b/lib/compiler/src/beam_split.erl
@@ -50,8 +50,9 @@ split_block([{set,[R],[_,_,_]=As,{bif,is_record,{f,Lbl}}}|Is], Bl, Acc) ->
split_block(Is, [], [{bif,is_record,{f,Lbl},As,R}|make_block(Bl, Acc)]);
split_block([{set,[R],As,{bif,N,{f,Lbl}=Fail}}|Is], Bl, Acc) when Lbl =/= 0 ->
split_block(Is, [], [{bif,N,Fail,As,R}|make_block(Bl, Acc)]);
-split_block([{set,[R],As,{bif,raise,{f,_}=Fail}}|Is], Bl, Acc) ->
- split_block(Is, [], [{bif,raise,Fail,As,R}|make_block(Bl, Acc)]);
+split_block([{set,[],[],{line,_}=Line},
+ {set,[R],As,{bif,raise,{f,_}=Fail}}|Is], Bl, Acc) ->
+ split_block(Is, [], [{bif,raise,Fail,As,R},Line|make_block(Bl, Acc)]);
split_block([{set,[R],As,{alloc,Live,{gc_bif,N,{f,Lbl}=Fail}}}|Is], Bl, Acc)
when Lbl =/= 0 ->
split_block(Is, [], [{gc_bif,N,Fail,Live,As,R}|make_block(Bl, Acc)]);
@@ -61,8 +62,6 @@ split_block([{set,[D],[S|Puts],{alloc,R,{put_map,Op,{f,Lbl}=Fail}}}|Is],
make_block(Bl, Acc)]);
split_block([{set,[R],[],{try_catch,Op,L}}|Is], Bl, Acc) ->
split_block(Is, [], [{Op,R,L}|make_block(Bl, Acc)]);
-split_block([{set,[],[],{line,_}=Line}|Is], Bl, Acc) ->
- split_block(Is, [], [Line|make_block(Bl, Acc)]);
split_block([I|Is], Bl, Acc) ->
split_block(Is, [I|Bl], Acc);
split_block([], Bl, Acc) -> make_block(Bl, Acc).