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authorBjörn Gustavsson <bjorn@erlang.org>2016-12-15 09:20:12 +0100
committerBjörn Gustavsson <bjorn@erlang.org>2017-01-12 12:10:11 +0100
commit7d3502edc002ecf8c02eeacd313bf9353067ba0d (patch)
treeb54e2f52560c749798c5ade5c3cb509485528c93 /lib
parente701ae9aa398f34014e2957921c5e2dbecabbcd5 (diff)
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beam_clean: Add types and specs
Diffstat (limited to 'lib')
-rw-r--r--lib/compiler/src/beam_clean.erl20
1 files changed, 16 insertions, 4 deletions
diff --git a/lib/compiler/src/beam_clean.erl b/lib/compiler/src/beam_clean.erl
index 10805a3c36..b736d39f9c 100644
--- a/lib/compiler/src/beam_clean.erl
+++ b/lib/compiler/src/beam_clean.erl
@@ -26,6 +26,9 @@
-export([clean_labels/1]).
-import(lists, [map/2,foldl/3,reverse/1,filter/2]).
+-spec module(beam_utils:module_code(), [compile:option()]) ->
+ {'ok',beam_utils:module_code()}.
+
module({Mod,Exp,Attr,Fs0,_}, Opts) ->
Order = [Lbl || {function,_,_,Lbl,_} <- Fs0],
All = foldl(fun({function,_,_,Lbl,_}=Func,D) -> dict:store(Lbl, Func, D) end,
@@ -39,6 +42,10 @@ module({Mod,Exp,Attr,Fs0,_}, Opts) ->
{ok,{Mod,Exp,Attr,Fs,Lc}}.
%% Remove all bs_save2/2 instructions not referenced by a bs_restore2/2.
+
+-spec bs_clean_saves([beam_utils:instruction()]) ->
+ [beam_utils:instruction()].
+
bs_clean_saves(Is) ->
Needed = bs_restores(Is, []),
bs_clean_saves_1(Is, gb_sets:from_list(Needed), []).
@@ -98,13 +105,18 @@ add_to_work_list(F, {Fs,Used}=Sets) ->
%%% want to see the expanded code in a .S file.
%%%
--record(st, {lmap, %Translation tables for labels.
- entry, %Number of entry label.
- lc %Label counter
+-type label() :: beam_asm:label().
+
+-record(st, {lmap :: [{label(),label()}], %Translation tables for labels.
+ entry :: beam_asm:label(), %Number of entry label.
+ lc :: non_neg_integer() %Label counter
}).
+-spec clean_labels([beam_utils:instruction()]) ->
+ {[beam_utils:instruction()],pos_integer()}.
+
clean_labels(Fs0) ->
- St0 = #st{lmap=[],lc=1},
+ St0 = #st{lmap=[],entry=1,lc=1},
{Fs1,#st{lmap=Lmap0,lc=Lc}} = function_renumber(Fs0, St0, []),
Lmap = gb_trees:from_orddict(ordsets:from_list(Lmap0)),
Fs = function_replace(Fs1, Lmap, []),