diff options
Diffstat (limited to 'lib/compiler/src/v3_kernel.erl')
| -rw-r--r-- | lib/compiler/src/v3_kernel.erl | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/lib/compiler/src/v3_kernel.erl b/lib/compiler/src/v3_kernel.erl index fd73e5a7dc..4e3ceedbc0 100644 --- a/lib/compiler/src/v3_kernel.erl +++ b/lib/compiler/src/v3_kernel.erl @@ -157,7 +157,13 @@ include_attribute(_) -> true. function({#c_var{name={F,Arity}=FA},Body}, St0) -> %%io:format("~w/~w~n", [F,Arity]), try - St1 = St0#kern{func=FA,ff=undefined,vcount=0,fcount=0,ds=cerl_sets:new()}, + %% Find a suitable starting value for the variable counter. Note + %% that this pass assumes that new_var_name/1 returns a variable + %% name distinct from any variable used in the entire body of + %% the function. We use integers as variable names to avoid + %% filling up the atom table when compiling huge functions. + Count = cerl_trees:next_free_variable_name(Body), + St1 = St0#kern{func=FA,ff=undefined,vcount=Count,fcount=0,ds=cerl_sets:new()}, {#ifun{anno=Ab,vars=Kvs,body=B0},[],St2} = expr(Body, new_sub(), St1), {B1,_,St3} = ubody(B0, return, St2), %%B1 = B0, St3 = St2, %Null second pass @@ -168,7 +174,6 @@ function({#c_var{name={F,Arity}=FA},Body}, St0) -> erlang:raise(Class, Error, Stack) end. - %% body(Cexpr, Sub, State) -> {Kexpr,[PreKepxr],State}. %% Do the main sequence of a body. A body ends in an atomic value or %% values. Must check if vector first so do expr. @@ -1356,7 +1361,7 @@ new_fun_name(Type, #kern{func={F,Arity},fcount=C}=St) -> %% new_var_name(State) -> {VarName,State}. new_var_name(#kern{vcount=C}=St) -> - {list_to_atom("@k" ++ integer_to_list(C)),St#kern{vcount=C+1}}. + {C,St#kern{vcount=C+1}}. %% new_var(State) -> {#k_var{},State}. @@ -2377,12 +2382,11 @@ uexpr(#k_try{anno=A,arg=A0,vars=Vs,body=B0,evars=Evs,handler=H0}, {A1,Au,St2} = ubody(A0, {break,Avs}, St1), {B1,Bu,St3} = ubody(B0, Br, St2), {H1,Hu,St4} = ubody(H0, Br, St3), - {Rs1,St5} = ensure_return_vars(Rs0, St4), Used = union([Au,subtract(Bu, lit_list_vars(Vs)), subtract(Hu, lit_list_vars(Evs))]), - {#k_try{anno=#k{us=Used,ns=lit_list_vars(Rs1),a=A}, - arg=A1,vars=Vs,body=B1,evars=Evs,handler=H1,ret=Rs1}, - Used,St5} + {#k_try{anno=#k{us=Used,ns=lit_list_vars(Rs0),a=A}, + arg=A1,vars=Vs,body=B1,evars=Evs,handler=H1,ret=Rs0}, + Used,St4} end; uexpr(#k_try{anno=A,arg=A0,vars=Vs,body=B0,evars=Evs,handler=H0}, return, St0) -> @@ -2390,13 +2394,11 @@ uexpr(#k_try{anno=A,arg=A0,vars=Vs,body=B0,evars=Evs,handler=H0}, {A1,Au,St2} = ubody(A0, {break,Avs}, St1), %Must break to clean up here! {B1,Bu,St3} = ubody(B0, return, St2), {H1,Hu,St4} = ubody(H0, return, St3), - NumNew = 1, - {Ns,St5} = new_vars(NumNew, St4), Used = union([Au,subtract(Bu, lit_list_vars(Vs)), subtract(Hu, lit_list_vars(Evs))]), - {#k_try_enter{anno=#k{us=Used,ns=Ns,a=A}, + {#k_try_enter{anno=#k{us=Used,ns=[],a=A}, arg=A1,vars=Vs,body=B1,evars=Evs,handler=H1}, - Used,St5}; + Used,St4}; uexpr(#k_catch{anno=A,body=B0}, {break,Rs0}, St0) -> {Rb,St1} = new_var(St0), {B1,Bu,St2} = ubody(B0, {break,[Rb]}, St1), |