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authorMichal Muskala <[email protected]>2017-04-19 12:50:04 +0200
committerMichal Muskala <[email protected]>2017-04-19 18:50:47 +0200
commit0377592dc2238f561291be854d2ce859dd9a5fb1 (patch)
tree3441115836c51f27a7a53a5df88fa86ae2164421 /lib
parent6124bfc9b61227a5e82f1d7273d0895e909aac6e (diff)
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Enhance type-driven optimisation in beam_type.erl
* kill type information only for affected registers in get_map_elements * bs_get_utf* will produce integers of unicode range This optimises code created by Elixir compiler, where: <<x::utf8,_::binary>> when x in 1..10 will compile the guard to is_integer(X) andalso X >= 1 andalso X =< 10 This allows us to eliminate the is_integer check. * bs_get_float will produce a float * allow to carry type information over other bs instructions killing only the affected registers * kill only x registers after call_fun and apply instructions
Diffstat (limited to 'lib')
-rw-r--r--lib/compiler/src/beam_type.erl44
1 files changed, 40 insertions, 4 deletions
diff --git a/lib/compiler/src/beam_type.erl b/lib/compiler/src/beam_type.erl
index 2b5d558ee4..7e9a243ada 100644
--- a/lib/compiler/src/beam_type.erl
+++ b/lib/compiler/src/beam_type.erl
@@ -26,6 +26,8 @@
-import(lists, [filter/2,foldl/3,keyfind/3,member/2,
reverse/1,reverse/2,sort/1]).
+-define(UNICODE_INT, {integer,{0,16#10FFFF}}).
+
-spec module(beam_utils:module_code(), [compile:option()]) ->
{'ok',beam_utils:module_code()}.
@@ -494,6 +496,10 @@ update({test,test_arity,_Fail,[Src,Arity]}, Ts0) ->
tdb_update([{Src,{tuple,Arity,[]}}], Ts0);
update({test,is_map,_Fail,[Src]}, Ts0) ->
tdb_update([{Src,map}], Ts0);
+update({get_map_elements,_,Src,{list,Elems0}}, Ts0) ->
+ {_Ss,Ds} = beam_utils:split_even(Elems0),
+ Elems = [{Dst,kill} || Dst <- Ds],
+ tdb_update([{Src,map}|Elems], Ts0);
update({test,is_nonempty_list,_Fail,[Src]}, Ts0) ->
tdb_update([{Src,nonempty_list}], Ts0);
update({test,is_eq_exact,_,[Reg,{atom,_}=Atom]}, Ts) ->
@@ -507,10 +513,39 @@ update({test,is_eq_exact,_,[Reg,{atom,_}=Atom]}, Ts) ->
end;
update({test,is_record,_Fail,[Src,Tag,{integer,Arity}]}, Ts) ->
tdb_update([{Src,{tuple,Arity,[Tag]}}], Ts);
-update({test,_Test,_Fail,_Other}, Ts) ->
- Ts;
+
+%% Binary matching
+
update({test,bs_get_integer2,_,_,Args,Dst}, Ts) ->
tdb_update([{Dst,get_bs_integer_type(Args)}], Ts);
+update({test,bs_get_utf8,_,_,_,Dst}, Ts) ->
+ tdb_update([{Dst,?UNICODE_INT}], Ts);
+update({test,bs_get_utf16,_,_,_,Dst}, Ts) ->
+ tdb_update([{Dst,?UNICODE_INT}], Ts);
+update({test,bs_get_utf32,_,_,_,Dst}, Ts) ->
+ tdb_update([{Dst,?UNICODE_INT}], Ts);
+update({bs_init,_,_,_,_,Dst}, Ts) ->
+ tdb_update([{Dst,kill}], Ts);
+update({bs_put,_,_,_}, Ts) ->
+ Ts;
+update({bs_save2,_,_}, Ts) ->
+ Ts;
+update({bs_restore2,_,_}, Ts) ->
+ Ts;
+update({bs_context_to_binary,Dst}, Ts) ->
+ tdb_update([{Dst,kill}], Ts);
+update({test,bs_start_match2,_,_,_,Dst}, Ts) ->
+ tdb_update([{Dst,kill}], Ts);
+update({test,bs_get_binary2,_,_,_,Dst}, Ts) ->
+ tdb_update([{Dst,kill}], Ts);
+update({test,bs_get_float2,_,_,_,Dst}, Ts) ->
+ tdb_update([{Dst,float}], Ts);
+
+update({test,_Test,_Fail,_Other}, Ts) ->
+ Ts;
+
+%% Calls
+
update({call_ext,Ar,{extfunc,math,Math,Ar}}, Ts) ->
case is_math_bif(Math, Ar) of
true -> tdb_update([{{x,0},float}], Ts);
@@ -537,9 +572,10 @@ update({call_ext,3,{extfunc,erlang,setelement,3}}, Ts0) ->
update({call,_Arity,_Func}, Ts) -> tdb_kill_xregs(Ts);
update({call_ext,_Arity,_Func}, Ts) -> tdb_kill_xregs(Ts);
update({make_fun2,_,_,_,_}, Ts) -> tdb_kill_xregs(Ts);
+update({call_fun, _}, Ts) -> tdb_kill_xregs(Ts);
+update({apply, _}, Ts) -> tdb_kill_xregs(Ts);
+
update({line,_}, Ts) -> Ts;
-update({bs_save2,_,_}, Ts) -> Ts;
-update({bs_restore2,_,_}, Ts) -> Ts;
%% The instruction is unknown. Kill all information.
update(_I, _Ts) -> tdb_new().