diff options
Diffstat (limited to 'lib/compiler/src/beam_utils.erl')
| -rw-r--r-- | lib/compiler/src/beam_utils.erl | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/lib/compiler/src/beam_utils.erl b/lib/compiler/src/beam_utils.erl index 3249024854..7704690f86 100644 --- a/lib/compiler/src/beam_utils.erl +++ b/lib/compiler/src/beam_utils.erl @@ -196,7 +196,7 @@ is_pure_test({test,Op,_,Ops}) -> %% Go through the instruction sequence in reverse execution %% order, keep track of liveness and remove 'move' instructions %% whose destination is a register that will not be used. -%% Also insert {'%live',Live} annotations at the beginning +%% Also insert {'%live',Live,Regs} annotations at the beginning %% and end of each block. %% live_opt(Is0) -> @@ -217,7 +217,7 @@ delete_live_annos([{block,Bl0}|Is]) -> [] -> delete_live_annos(Is); [_|_]=Bl -> [{block,Bl}|delete_live_annos(Is)] end; -delete_live_annos([{'%live',_}|Is]) -> +delete_live_annos([{'%live',_,_}|Is]) -> delete_live_annos(Is); delete_live_annos([I|Is]) -> [I|delete_live_annos(Is)]; @@ -366,11 +366,6 @@ check_liveness(R, [{apply,Args}|Is], St) -> {x,_} -> {killed,St}; {y,_} -> check_liveness(R, Is, St) end; -check_liveness({x,R}, [{'%live',Live}|Is], St) -> - if - R < Live -> check_liveness(R, Is, St); - true -> {killed,St} - end; check_liveness(R, [{bif,Op,{f,Fail},Ss,D}|Is], St0) -> case check_liveness_fail(R, Op, Ss, Fail, St0) of {killed,St} = Killed -> @@ -554,7 +549,7 @@ check_killed_block(R, [{set,Ds,Ss,_Op}|Is]) -> false -> check_killed_block(R, Is) end end; -check_killed_block(R, [{'%live',Live}|Is]) -> +check_killed_block(R, [{'%live',Live,_}|Is]) -> case R of {x,X} when X >= Live -> killed; _ -> check_killed_block(R, Is) @@ -577,7 +572,7 @@ check_used_block({x,X}=R, [{set,Ds,Ss,{alloc,Live,Op}}|Is], St) -> end; check_used_block(R, [{set,Ds,Ss,Op}|Is], St) -> check_used_block_1(R, Ss, Ds, Op, Is, St); -check_used_block(R, [{'%live',Live}|Is], St) -> +check_used_block(R, [{'%live',Live,_}|Is], St) -> case R of {x,X} when X >= Live -> {killed,St}; _ -> check_used_block(R, Is, St) @@ -678,9 +673,9 @@ live_opt([{test,bs_start_match2,Fail,Live,[Src,_],_}=I|Is], _, D, Acc) -> %% Other instructions. live_opt([{block,Bl0}|Is], Regs0, D, Acc) -> - Live0 = {'%live',live_regs(Regs0)}, + Live0 = {'%live',live_regs(Regs0),Regs0}, {Bl,Regs} = live_opt_block(reverse(Bl0), Regs0, D, [Live0]), - Live = {'%live',live_regs(Regs)}, + Live = {'%live',live_regs(Regs),Regs}, live_opt(Is, Regs, D, [{block,[Live|Bl]}|Acc]); live_opt([{label,L}=I|Is], Regs, D0, Acc) -> D = gb_trees:insert(L, Regs, D0), |