diff options
Diffstat (limited to 'lib/compiler/src/beam_bsm.erl')
| -rw-r--r-- | lib/compiler/src/beam_bsm.erl | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/lib/compiler/src/beam_bsm.erl b/lib/compiler/src/beam_bsm.erl index 9a4e7fb133..1c8e0e9854 100644 --- a/lib/compiler/src/beam_bsm.erl +++ b/lib/compiler/src/beam_bsm.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2007-2016. All Rights Reserved. +%% Copyright Ericsson AB 2007-2018. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. @@ -105,8 +105,7 @@ function({function,Name,Arity,Entry,Is}, FIndex) -> D = #btb{f=FIndex,index=Index}, {function,Name,Arity,Entry,btb_opt_1(Is, D, [])} catch - Class:Error -> - Stack = erlang:get_stacktrace(), + Class:Error:Stack -> io:fwrite("Function: ~w/~w\n", [Name,Arity]), erlang:raise(Class, Error, Stack) end. @@ -125,20 +124,21 @@ btb_opt_1([{test,bs_get_binary2,F,_,[Reg,{atom,all},U,Fs],Reg}=I0|Is], D, Acc0) end, btb_opt_1(Is, D, Acc) end; -btb_opt_1([{test,bs_get_binary2,F,_,[Ctx,{atom,all},U,Fs],Dst}=I0|Is], D, Acc0) -> - case btb_reaches_match(Is, [Ctx,Dst], D) of +btb_opt_1([{test,bs_get_binary2,F,_,[Ctx,{atom,all},U,Fs],Dst}=I0|Is0], D, Acc0) -> + case btb_reaches_match(Is0, [Ctx,Dst], D) of {error,Reason} -> Comment = btb_comment_no_opt(Reason, Fs), - btb_opt_1(Is, D, [Comment,I0|Acc0]); + btb_opt_1(Is0, D, [Comment,I0|Acc0]); {ok,MustSave} when U =:= 1 -> Comment = btb_comment_opt(Fs), - Acc1 = btb_gen_save(MustSave, Ctx, [Comment|Acc0]), - Acc = [{move,Ctx,Dst}|Acc1], + Acc = btb_gen_save(MustSave, Ctx, [Comment|Acc0]), + Is = prepend_move(Ctx, Dst, Is0), btb_opt_1(Is, D, Acc); {ok,MustSave} -> Comment = btb_comment_opt(Fs), Acc1 = btb_gen_save(MustSave, Ctx, [Comment|Acc0]), - Acc = [{move,Ctx,Dst},{test,bs_test_unit,F,[Ctx,U]}|Acc1], + Acc = [{test,bs_test_unit,F,[Ctx,U]}|Acc1], + Is = prepend_move(Ctx, Dst, Is0), btb_opt_1(Is, D, Acc) end; btb_opt_1([I|Is], D, Acc) -> @@ -151,6 +151,12 @@ btb_gen_save(true, Reg, Acc) -> [{bs_save2,Reg,{atom,start}}|Acc]; btb_gen_save(false, _, Acc) -> Acc. +prepend_move(Ctx, Dst, [{block,Bl0}|Is]) -> + Bl = [{set,[Dst],[Ctx],move}|Bl0], + [{block,Bl}|Is]; +prepend_move(Ctx, Dst, Is) -> + [{move,Ctx,Dst}|Is]. + %% btb_reaches_match([Instruction], [Register], D) -> %% {ok,MustSave}|{error,Reason} %% |