From 7ed11a886fc8fcaf3c2b8324294e2f24e02b0f28 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Holger=20Wei=C3=9F?= Date: Mon, 15 Nov 2010 12:05:16 +0100 Subject: Call chmod without the "-f" flag "-f" is a non-standard chmod option which at least SGI IRIX and HP UX do not support. As the only effect of the "-f" flag is to suppress warning messages, it can be safely omitted. --- lib/compiler/test/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'lib/compiler') diff --git a/lib/compiler/test/Makefile b/lib/compiler/test/Makefile index 2d08e71e09..44ae3b2eb7 100644 --- a/lib/compiler/test/Makefile +++ b/lib/compiler/test/Makefile @@ -157,7 +157,7 @@ release_tests_spec: make_emakefile $(EMAKEFILE) $(ERL_FILES) $(CORE_FILES) $(RELSYSDIR) $(INSTALL_DATA) $(NO_OPT_ERL_FILES) $(POST_OPT_ERL_FILES) \ $(INLINE_ERL_FILES) $(RELSYSDIR) - chmod -f -R u+w $(RELSYSDIR) + chmod -R u+w $(RELSYSDIR) @tar cf - *_SUITE_data | (cd $(RELSYSDIR); tar xf -) release_docs_spec: -- cgit v1.2.3 From 40a96ab9a41b780d59da643cce71084e72901a54 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Tue, 15 Feb 2011 07:34:08 +0100 Subject: sys_core_fold: Be careful to preserve annotations while optimizing --- lib/compiler/src/sys_core_fold.erl | 183 ++++++++++++++++++++----------------- 1 file changed, 99 insertions(+), 84 deletions(-) (limited to 'lib/compiler') diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index 96015fbe58..c870bb68c8 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -460,7 +460,8 @@ eval_binary(#c_binary{anno=Anno,segments=Ss}=Bin) -> Bin; throw:{badarg,Warning} -> add_warning(Bin, Warning), - #c_call{module=#c_literal{val=erlang}, + #c_call{anno=Anno, + module=#c_literal{val=erlang}, name=#c_literal{val=error}, args=[#c_literal{val=badarg}]} end. @@ -658,36 +659,34 @@ call_0(Call, M, N, As0, Sub) -> %% We inline some very common higher order list operations. %% We use the same evaluation order as the library function. -call_1(_Call, lists, all, [Arg1,Arg2], Sub) -> +call_1(#c_call{anno=Anno}, lists, all, [Arg1,Arg2], Sub) -> Loop = #c_var{name={'lists^all',1}}, F = #c_var{name='F'}, Xs = #c_var{name='Xs'}, X = #c_var{name='X'}, Err1 = #c_tuple{es=[#c_literal{val='case_clause'}, X]}, CC1 = #c_clause{pats=[#c_literal{val=true}], guard=#c_literal{val=true}, - body=#c_apply{op=Loop, args=[Xs]}}, + body=#c_apply{anno=Anno, op=Loop, args=[Xs]}}, CC2 = #c_clause{pats=[#c_literal{val=false}], guard=#c_literal{val=true}, body=#c_literal{val=false}}, CC3 = #c_clause{pats=[X], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err1]}}, + body=match_fail(Anno, Err1)}, C1 = #c_clause{pats=[#c_cons{hd=X, tl=Xs}], guard=#c_literal{val=true}, - body=#c_case{arg=#c_apply{op=F, args=[X]}, + body=#c_case{arg=#c_apply{anno=Anno, op=F, args=[X]}, clauses = [CC1, CC2, CC3]}}, C2 = #c_clause{pats=[#c_literal{val=[]}], guard=#c_literal{val=true}, body=#c_literal{val=true}}, Err2 = #c_tuple{es=[#c_literal{val='function_clause'}, Xs]}, C3 = #c_clause{pats=[Xs], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err2]}}, + body=match_fail(Anno, Err2)}, Fun = #c_fun{vars=[Xs], body=#c_case{arg=Xs, clauses=[C1, C2, C3]}}, L = #c_var{name='L'}, expr(#c_let{vars=[F, L], arg=#c_values{es=[Arg1, Arg2]}, body=#c_letrec{defs=[{Loop,Fun}], - body=#c_apply{op=Loop, args=[L]}}}, + body=#c_apply{anno=Anno, op=Loop, args=[L]}}}, Sub); -call_1(_Call, lists, any, [Arg1,Arg2], Sub) -> +call_1(#c_call{anno=Anno}, lists, any, [Arg1,Arg2], Sub) -> Loop = #c_var{name={'lists^any',1}}, F = #c_var{name='F'}, Xs = #c_var{name='Xs'}, @@ -696,72 +695,71 @@ call_1(_Call, lists, any, [Arg1,Arg2], Sub) -> CC1 = #c_clause{pats=[#c_literal{val=true}], guard=#c_literal{val=true}, body=#c_literal{val=true}}, CC2 = #c_clause{pats=[#c_literal{val=false}], guard=#c_literal{val=true}, - body=#c_apply{op=Loop, args=[Xs]}}, + body=#c_apply{anno=Anno, op=Loop, args=[Xs]}}, CC3 = #c_clause{pats=[X], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err1]}}, + body=match_fail(Anno, Err1)}, C1 = #c_clause{pats=[#c_cons{hd=X, tl=Xs}], guard=#c_literal{val=true}, - body=#c_case{arg=#c_apply{op=F, args=[X]}, + body=#c_case{arg=#c_apply{anno=Anno, op=F, args=[X]}, clauses = [CC1, CC2, CC3]}}, C2 = #c_clause{pats=[#c_literal{val=[]}], guard=#c_literal{val=true}, body=#c_literal{val=false}}, Err2 = #c_tuple{es=[#c_literal{val='function_clause'}, Xs]}, C3 = #c_clause{pats=[Xs], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err2]}}, + body=match_fail(Anno, Err2)}, Fun = #c_fun{vars=[Xs], body=#c_case{arg=Xs, clauses=[C1, C2, C3]}}, L = #c_var{name='L'}, expr(#c_let{vars=[F, L], arg=#c_values{es=[Arg1, Arg2]}, body=#c_letrec{defs=[{Loop,Fun}], - body=#c_apply{op=Loop, args=[L]}}}, + body=#c_apply{anno=Anno, op=Loop, args=[L]}}}, Sub); -call_1(_Call, lists, foreach, [Arg1,Arg2], Sub) -> +call_1(#c_call{anno=Anno}, lists, foreach, [Arg1,Arg2], Sub) -> Loop = #c_var{name={'lists^foreach',1}}, F = #c_var{name='F'}, Xs = #c_var{name='Xs'}, X = #c_var{name='X'}, C1 = #c_clause{pats=[#c_cons{hd=X, tl=Xs}], guard=#c_literal{val=true}, - body=#c_seq{arg=#c_apply{op=F, args=[X]}, - body=#c_apply{op=Loop, args=[Xs]}}}, + body=#c_seq{arg=#c_apply{anno=Anno, op=F, args=[X]}, + body=#c_apply{anno=Anno, op=Loop, args=[Xs]}}}, C2 = #c_clause{pats=[#c_literal{val=[]}], guard=#c_literal{val=true}, body=#c_literal{val=ok}}, Err = #c_tuple{es=[#c_literal{val='function_clause'}, Xs]}, C3 = #c_clause{pats=[Xs], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err]}}, + body=match_fail(Anno, Err)}, Fun = #c_fun{vars=[Xs], body=#c_case{arg=Xs, clauses=[C1, C2, C3]}}, L = #c_var{name='L'}, expr(#c_let{vars=[F, L], arg=#c_values{es=[Arg1, Arg2]}, body=#c_letrec{defs=[{Loop,Fun}], - body=#c_apply{op=Loop, args=[L]}}}, + body=#c_apply{anno=Anno, op=Loop, args=[L]}}}, Sub); -call_1(_Call, lists, map, [Arg1,Arg2], Sub) -> +call_1(#c_call{anno=Anno}, lists, map, [Arg1,Arg2], Sub) -> Loop = #c_var{name={'lists^map',1}}, F = #c_var{name='F'}, Xs = #c_var{name='Xs'}, X = #c_var{name='X'}, H = #c_var{name='H'}, C1 = #c_clause{pats=[#c_cons{hd=X, tl=Xs}], guard=#c_literal{val=true}, - body=#c_let{vars=[H], arg=#c_apply{op=F, args=[X]}, + body=#c_let{vars=[H], arg=#c_apply{anno=Anno, + op=F, + args=[X]}, body=#c_cons{hd=H, - tl=#c_apply{op=Loop, + tl=#c_apply{anno=Anno, + op=Loop, args=[Xs]}}}}, C2 = #c_clause{pats=[#c_literal{val=[]}], guard=#c_literal{val=true}, body=#c_literal{val=[]}}, Err = #c_tuple{es=[#c_literal{val='function_clause'}, Xs]}, C3 = #c_clause{pats=[Xs], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err]}}, + body=match_fail(Anno, Err)}, Fun = #c_fun{vars=[Xs], body=#c_case{arg=Xs, clauses=[C1, C2, C3]}}, L = #c_var{name='L'}, expr(#c_let{vars=[F, L], arg=#c_values{es=[Arg1, Arg2]}, body=#c_letrec{defs=[{Loop,Fun}], - body=#c_apply{op=Loop, args=[L]}}}, + body=#c_apply{anno=Anno, op=Loop, args=[L]}}}, Sub); -call_1(_Call, lists, flatmap, [Arg1,Arg2], Sub) -> +call_1(#c_call{anno=Anno}, lists, flatmap, [Arg1,Arg2], Sub) -> Loop = #c_var{name={'lists^flatmap',1}}, F = #c_var{name='F'}, Xs = #c_var{name='Xs'}, @@ -769,26 +767,27 @@ call_1(_Call, lists, flatmap, [Arg1,Arg2], Sub) -> H = #c_var{name='H'}, C1 = #c_clause{pats=[#c_cons{hd=X, tl=Xs}], guard=#c_literal{val=true}, body=#c_let{vars=[H], - arg=#c_apply{op=F, args=[X]}, - body=#c_call{module=#c_literal{val=erlang}, + arg=#c_apply{anno=Anno, op=F, args=[X]}, + body=#c_call{anno=Anno, + module=#c_literal{val=erlang}, name=#c_literal{val='++'}, args=[H, - #c_apply{op=Loop, + #c_apply{anno=Anno, + op=Loop, args=[Xs]}]}}}, C2 = #c_clause{pats=[#c_literal{val=[]}], guard=#c_literal{val=true}, body=#c_literal{val=[]}}, Err = #c_tuple{es=[#c_literal{val='function_clause'}, Xs]}, C3 = #c_clause{pats=[Xs], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err]}}, + body=match_fail(Anno, Err)}, Fun = #c_fun{vars=[Xs], body=#c_case{arg=Xs, clauses=[C1, C2, C3]}}, L = #c_var{name='L'}, expr(#c_let{vars=[F, L], arg=#c_values{es=[Arg1, Arg2]}, body=#c_letrec{defs=[{Loop,Fun}], - body=#c_apply{op=Loop, args=[L]}}}, + body=#c_apply{anno=Anno, op=Loop, args=[L]}}}, Sub); -call_1(_Call, lists, filter, [Arg1,Arg2], Sub) -> +call_1(#c_call{anno=Anno}, lists, filter, [Arg1,Arg2], Sub) -> Loop = #c_var{name={'lists^filter',1}}, F = #c_var{name='F'}, Xs = #c_var{name='Xs'}, @@ -800,72 +799,75 @@ call_1(_Call, lists, filter, [Arg1,Arg2], Sub) -> CC2 = #c_clause{pats=[#c_literal{val=false}], guard=#c_literal{val=true}, body=Xs}, CC3 = #c_clause{pats=[X], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err1]}}, + body=match_fail(Anno, Err1)}, Case = #c_case{arg=B, clauses = [CC1, CC2, CC3]}, C1 = #c_clause{pats=[#c_cons{hd=X, tl=Xs}], guard=#c_literal{val=true}, body=#c_let{vars=[B], - arg=#c_apply{op=F, args=[X]}, + arg=#c_apply{anno=Anno, op=F, args=[X]}, body=#c_let{vars=[Xs], - arg=#c_apply{op=Loop, + arg=#c_apply{anno=Anno, + op=Loop, args=[Xs]}, body=Case}}}, C2 = #c_clause{pats=[#c_literal{val=[]}], guard=#c_literal{val=true}, body=#c_literal{val=[]}}, Err2 = #c_tuple{es=[#c_literal{val='function_clause'}, Xs]}, C3 = #c_clause{pats=[Xs], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err2]}}, + body=match_fail(Anno, Err2)}, Fun = #c_fun{vars=[Xs], body=#c_case{arg=Xs, clauses=[C1, C2, C3]}}, L = #c_var{name='L'}, expr(#c_let{vars=[F, L], arg=#c_values{es=[Arg1, Arg2]}, body=#c_letrec{defs=[{Loop,Fun}], - body=#c_apply{op=Loop, args=[L]}}}, + body=#c_apply{anno=Anno, op=Loop, args=[L]}}}, Sub); -call_1(_Call, lists, foldl, [Arg1,Arg2,Arg3], Sub) -> +call_1(#c_call{anno=Anno}, lists, foldl, [Arg1,Arg2,Arg3], Sub) -> Loop = #c_var{name={'lists^foldl',2}}, F = #c_var{name='F'}, Xs = #c_var{name='Xs'}, X = #c_var{name='X'}, A = #c_var{name='A'}, C1 = #c_clause{pats=[#c_cons{hd=X, tl=Xs}], guard=#c_literal{val=true}, - body=#c_apply{op=Loop, - args=[Xs, #c_apply{op=F, args=[X, A]}]}}, + body=#c_apply{anno=Anno, + op=Loop, + args=[Xs, #c_apply{anno=Anno, + op=F, + args=[X, A]}]}}, C2 = #c_clause{pats=[#c_literal{val=[]}], guard=#c_literal{val=true}, body=A}, Err = #c_tuple{es=[#c_literal{val='function_clause'}, Xs]}, C3 = #c_clause{pats=[Xs], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err]}}, + body=match_fail(Anno, Err)}, Fun = #c_fun{vars=[Xs, A], body=#c_case{arg=Xs, clauses=[C1, C2, C3]}}, L = #c_var{name='L'}, expr(#c_let{vars=[F, A, L], arg=#c_values{es=[Arg1, Arg2, Arg3]}, body=#c_letrec{defs=[{Loop,Fun}], - body=#c_apply{op=Loop, args=[L, A]}}}, + body=#c_apply{anno=Anno, op=Loop, args=[L, A]}}}, Sub); -call_1(_Call, lists, foldr, [Arg1,Arg2,Arg3], Sub) -> +call_1(#c_call{anno=Anno}, lists, foldr, [Arg1,Arg2,Arg3], Sub) -> Loop = #c_var{name={'lists^foldr',2}}, F = #c_var{name='F'}, Xs = #c_var{name='Xs'}, X = #c_var{name='X'}, A = #c_var{name='A'}, C1 = #c_clause{pats=[#c_cons{hd=X, tl=Xs}], guard=#c_literal{val=true}, - body=#c_apply{op=F, args=[X, #c_apply{op=Loop, - args=[Xs, A]}]}}, + body=#c_apply{anno=Anno, + op=F, + args=[X, #c_apply{anno=Anno, + op=Loop, + args=[Xs, A]}]}}, C2 = #c_clause{pats=[#c_literal{val=[]}], guard=#c_literal{val=true}, body=A}, Err = #c_tuple{es=[#c_literal{val='function_clause'}, Xs]}, C3 = #c_clause{pats=[Xs], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err]}}, + body=match_fail(Anno, Err)}, Fun = #c_fun{vars=[Xs, A], body=#c_case{arg=Xs, clauses=[C1, C2, C3]}}, L = #c_var{name='L'}, expr(#c_let{vars=[F, A, L], arg=#c_values{es=[Arg1, Arg2, Arg3]}, body=#c_letrec{defs=[{Loop,Fun}], - body=#c_apply{op=Loop, args=[L, A]}}}, + body=#c_apply{anno=Anno, op=Loop, args=[L, A]}}}, Sub); -call_1(_Call, lists, mapfoldl, [Arg1,Arg2,Arg3], Sub) -> +call_1(#c_call{anno=Anno}, lists, mapfoldl, [Arg1,Arg2,Arg3], Sub) -> Loop = #c_var{name={'lists^mapfoldl',2}}, F = #c_var{name='F'}, Xs = #c_var{name='Xs'}, @@ -876,15 +878,16 @@ call_1(_Call, lists, mapfoldl, [Arg1,Arg2,Arg3], Sub) -> C1 = #c_clause{pats=[P], guard=#c_literal{val=true}, body=E}, Err = #c_tuple{es=[#c_literal{val='badmatch'}, X]}, C2 = #c_clause{pats=[X], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err]}}, + body=match_fail(Anno, Err)}, #c_case{arg=A, clauses=[C1, C2]} end, C1 = #c_clause{pats=[#c_cons{hd=X, tl=Xs}], guard=#c_literal{val=true}, - body=Match(#c_apply{op=F, args=[X, Avar]}, + body=Match(#c_apply{anno=Anno, op=F, args=[X, Avar]}, #c_tuple{es=[X, Avar]}, %%% Tuple passing version - Match(#c_apply{op=Loop, args=[Xs, Avar]}, + Match(#c_apply{anno=Anno, + op=Loop, + args=[Xs, Avar]}, #c_tuple{es=[Xs, Avar]}, #c_tuple{es=[#c_cons{hd=X, tl=Xs}, Avar]}) %%% Multiple-value version @@ -902,22 +905,23 @@ call_1(_Call, lists, mapfoldl, [Arg1,Arg2,Arg3], Sub) -> %%% body=#c_values{es=[#c_literal{val=[]}, A]}}, Err = #c_tuple{es=[#c_literal{val='function_clause'}, Xs]}, C3 = #c_clause{pats=[Xs], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err]}}, + body=match_fail(Anno, Err)}, Fun = #c_fun{vars=[Xs, Avar], body=#c_case{arg=Xs, clauses=[C1, C2, C3]}}, L = #c_var{name='L'}, expr(#c_let{vars=[F, Avar, L], arg=#c_values{es=[Arg1, Arg2, Arg3]}, body=#c_letrec{defs=[{Loop,Fun}], %%% Tuple passing version - body=#c_apply{op=Loop, args=[L, Avar]}}}, + body=#c_apply{anno=Anno, + op=Loop, + args=[L, Avar]}}}, %%% Multiple-value version %%% body=#c_let{vars=[Xs, A], %%% arg=#c_apply{op=Loop, %%% args=[L, A]}, %%% body=#c_tuple{es=[Xs, A]}}}}, Sub); -call_1(_Call, lists, mapfoldr, [Arg1,Arg2,Arg3], Sub) -> +call_1(#c_call{anno=Anno}, lists, mapfoldr, [Arg1,Arg2,Arg3], Sub) -> Loop = #c_var{name={'lists^mapfoldr',2}}, F = #c_var{name='F'}, Xs = #c_var{name='Xs'}, @@ -928,15 +932,16 @@ call_1(_Call, lists, mapfoldr, [Arg1,Arg2,Arg3], Sub) -> C1 = #c_clause{pats=[P], guard=#c_literal{val=true}, body=E}, Err = #c_tuple{es=[#c_literal{val='badmatch'}, X]}, C2 = #c_clause{pats=[X], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err]}}, + body=match_fail(Anno, Err)}, #c_case{arg=A, clauses=[C1, C2]} end, C1 = #c_clause{pats=[#c_cons{hd=X, tl=Xs}], guard=#c_literal{val=true}, %%% Tuple passing version - body=Match(#c_apply{op=Loop, args=[Xs, Avar]}, + body=Match(#c_apply{anno=Anno, + op=Loop, + args=[Xs, Avar]}, #c_tuple{es=[Xs, Avar]}, - Match(#c_apply{op=F, args=[X, Avar]}, + Match(#c_apply{anno=Anno, op=F, args=[X, Avar]}, #c_tuple{es=[X, Avar]}, #c_tuple{es=[#c_cons{hd=X, tl=Xs}, Avar]})) %%% Multiple-value version @@ -955,15 +960,16 @@ call_1(_Call, lists, mapfoldr, [Arg1,Arg2,Arg3], Sub) -> %%% body=#c_values{es=[#c_literal{val=[]}, A]}}, Err = #c_tuple{es=[#c_literal{val='function_clause'}, Xs]}, C3 = #c_clause{pats=[Xs], guard=#c_literal{val=true}, - body=#c_primop{name=#c_literal{val='match_fail'}, - args=[Err]}}, + body=match_fail(Anno, Err)}, Fun = #c_fun{vars=[Xs, Avar], body=#c_case{arg=Xs, clauses=[C1, C2, C3]}}, L = #c_var{name='L'}, expr(#c_let{vars=[F, Avar, L], arg=#c_values{es=[Arg1, Arg2, Arg3]}, body=#c_letrec{defs=[{Loop,Fun}], %%% Tuple passing version - body=#c_apply{op=Loop, args=[L, Avar]}}}, + body=#c_apply{anno=Anno, + op=Loop, + args=[L, Avar]}}}, %%% Multiple-value version %%% body=#c_let{vars=[Xs, A], %%% arg=#c_apply{op=Loop, @@ -973,6 +979,11 @@ call_1(_Call, lists, mapfoldr, [Arg1,Arg2,Arg3], Sub) -> call_1(#c_call{module=M, name=N}=Call, _, _, As, Sub) -> call_0(Call, M, N, As, Sub). +match_fail(Anno, Arg) -> + #c_primop{anno=Anno, + name=#c_literal{val='match_fail'}, + args=[Arg]}. + %% fold_call(Call, Mod, Name, Args, Sub) -> Expr. %% Try to safely evaluate the call. Just try to evaluate arguments, %% do the call and convert return values to literals. If this @@ -1280,9 +1291,9 @@ eval_setelement_2(Pos, [H|T], NewVal) when Pos > 1 -> %% eval_failure(Call, Reason) -> add_warning(Call, {eval_failure,Reason}), - #c_call{module=#c_literal{val=erlang}, - name=#c_literal{val=error}, - args=[#c_literal{val=Reason}]}. + Call#c_call{module=#c_literal{val=erlang}, + name=#c_literal{val=error}, + args=[#c_literal{val=Reason}]}. %% simplify_apply(Call0, Mod, Func, Args) -> Call %% Simplify an apply/3 to a call if the number of arguments @@ -1742,23 +1753,24 @@ opt_bool_clauses([_|_], _, _) -> opt_bool_not(#c_case{arg=Arg,clauses=Cs0}=Case0) -> case Arg of - #c_call{module=#c_literal{val=erlang}, + #c_call{anno=Anno,module=#c_literal{val=erlang}, name=#c_literal{val='not'}, args=[Expr]} -> - Cs = opt_bool_not(Expr, Cs0), + Cs = opt_bool_not(Anno, Expr, Cs0), Case = Case0#c_case{arg=Expr,clauses=Cs}, opt_bool_not(Case); _ -> opt_bool_case_redundant(Case0) end. -opt_bool_not(Expr, Cs) -> +opt_bool_not(Anno, Expr, Cs) -> Tail = case is_bool_expr(Expr) of false -> [#c_clause{anno=[compiler_generated], pats=[#c_var{name=cor_variable}], guard=#c_literal{val=true}, - body=#c_call{module=#c_literal{val=erlang}, + body=#c_call{anno=Anno, + module=#c_literal{val=erlang}, name=#c_literal{val=error}, args=[#c_literal{val=badarg}]}}]; true -> [] @@ -1957,13 +1969,16 @@ case_tuple_pat([#c_tuple{es=Ps}], Arity) when length(Ps) =:= Arity -> case_tuple_pat([#c_literal{val=T}], Arity) when tuple_size(T) =:= Arity -> Ps = [#c_literal{val=E} || E <- tuple_to_list(T)], {ok,Ps,[]}; -case_tuple_pat([#c_var{anno=A}=V], Arity) -> - Vars = make_vars(A, 1, Arity), - {ok,Vars,[{V,#c_tuple{es=Vars}}]}; +case_tuple_pat([#c_var{anno=Anno}=V], Arity) -> + Vars = make_vars(Anno, 1, Arity), + {ok,Vars,[{V,#c_tuple{anno=Anno,es=Vars}}]}; case_tuple_pat([#c_alias{var=V,pat=P}], Arity) -> case case_tuple_pat([P], Arity) of - {ok,Ps,Avs} -> {ok,Ps,[{V,#c_tuple{es=unalias_pat_list(Ps)}}|Avs]}; - error -> error + {ok,Ps,Avs} -> + Anno = core_lib:get_anno(P), + {ok,Ps,[{V,#c_tuple{anno=Anno,es=unalias_pat_list(Ps)}}|Avs]}; + error -> + error end; case_tuple_pat(_, _) -> error. -- cgit v1.2.3 From c6b0d6dce5709c61e549e850c2615fd288e27ba9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Tue, 15 Mar 2011 07:55:44 +0100 Subject: sys_core_fold: Eliminate incorrect warning The compiler (sys_core_fold) tries to avoid constructing tuples in case expressions. The following code: c(A, B) -> case {A,B} of {ok,X} -> X; {_,_} -> error end. will be rewritten so that no tuple is built. If a clause requires a tuple to be built as in this code: c(A, B) -> case {A,B} of {ok,X} -> X; V -> V %The tuple will be built here end. the tuple will be built in the clause(s) in which it is needed. If the value returned from the case is not used as in this code: c(A, B) -> case {A,B} of V -> V %Warning: a term is constructed, but never used end, ok. there will be an incorrect warning. Basically, what happens is that the code is reduced to: c(A, B) -> {A,B}, %Warning: a term is constructed, but never used ok. and the optimizer sees that the {A,B} tuple can't possibly be used. Eliminate the warning by adding a 'compiler_generated' annotation to the tuple. Reported-by: Kostis Sagonas --- lib/compiler/src/sys_core_fold.erl | 15 ++++++++++++--- lib/compiler/test/warnings_SUITE.erl | 10 ++++++++++ 2 files changed, 22 insertions(+), 3 deletions(-) (limited to 'lib/compiler') diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index c870bb68c8..9360556e00 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -1969,13 +1969,22 @@ case_tuple_pat([#c_tuple{es=Ps}], Arity) when length(Ps) =:= Arity -> case_tuple_pat([#c_literal{val=T}], Arity) when tuple_size(T) =:= Arity -> Ps = [#c_literal{val=E} || E <- tuple_to_list(T)], {ok,Ps,[]}; -case_tuple_pat([#c_var{anno=Anno}=V], Arity) -> - Vars = make_vars(Anno, 1, Arity), +case_tuple_pat([#c_var{anno=Anno0}=V], Arity) -> + Vars = make_vars(Anno0, 1, Arity), + + %% If the entire case statement is evaluated in an effect + %% context (e.g. "case {A,B} of ... end, ok"), there will + %% be a warning that a term is constructed but never used. + %% To avoid that warning, we must annotate the tuple as + %% compiler generated. + + Anno = [compiler_generated|Anno0], {ok,Vars,[{V,#c_tuple{anno=Anno,es=Vars}}]}; case_tuple_pat([#c_alias{var=V,pat=P}], Arity) -> case case_tuple_pat([P], Arity) of {ok,Ps,Avs} -> - Anno = core_lib:get_anno(P), + Anno0 = core_lib:get_anno(P), + Anno = [compiler_generated|Anno0], {ok,Ps,[{V,#c_tuple{anno=Anno,es=unalias_pat_list(Ps)}}|Avs]}; error -> error diff --git a/lib/compiler/test/warnings_SUITE.erl b/lib/compiler/test/warnings_SUITE.erl index 8cc3ca4199..dd18a6e1a3 100644 --- a/lib/compiler/test/warnings_SUITE.erl +++ b/lib/compiler/test/warnings_SUITE.erl @@ -453,6 +453,16 @@ effect(Config) when is_list(Config) -> true -> ok end, ok. + + m8(A, B) -> + case {A,B} of + V -> V + end, + ok. + + m9(Bs) -> + [{B,ok} = {B,foo:bar(B)} || B <- Bs], + ok. ">>, [], {warnings,[{5,sys_core_fold,{no_effect,{erlang,is_integer,1}}}, -- cgit v1.2.3 From b0339050273dfe57b9cbadd9f60b8df766888609 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Thu, 17 Feb 2011 13:48:57 +0100 Subject: beam_dict: Fix typo in comment --- lib/compiler/src/beam_dict.erl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'lib/compiler') diff --git a/lib/compiler/src/beam_dict.erl b/lib/compiler/src/beam_dict.erl index a503fcab38..7f178ba547 100644 --- a/lib/compiler/src/beam_dict.erl +++ b/lib/compiler/src/beam_dict.erl @@ -139,7 +139,7 @@ lambda(Lbl, Index, OldUniq, NumFree, #asm{lambdas=Lambdas0}=Dict) -> Lambdas = [{Lbl,{OldIndex,Lbl,Index,NumFree,OldUniq}}|Lambdas0], {OldIndex,Dict#asm{lambdas=Lambdas}}. -%% Returns the index for a literal (adding it to the atom table if necessary). +%% Returns the index for a literal (adding it to the literal table if necessary). %% literal(Literal, Dict) -> {Index,Dict'} -spec literal(term(), bdict()) -> {non_neg_integer(), bdict()}. -- cgit v1.2.3 From dc3f88bc9b1e6ecacc2f441a0a23b51693a383c7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Thu, 17 Feb 2011 15:14:14 +0100 Subject: beam_dict: Eliminate the redundant next_atom record element It is not needed because it can be trivially calculated using gb_trees:size/1. --- lib/compiler/src/beam_dict.erl | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'lib/compiler') diff --git a/lib/compiler/src/beam_dict.erl b/lib/compiler/src/beam_dict.erl index 7f178ba547..c50ed28aa9 100644 --- a/lib/compiler/src/beam_dict.erl +++ b/lib/compiler/src/beam_dict.erl @@ -36,7 +36,6 @@ strings = <<>> :: binary(), %String pool lambdas = [], %[{...}] literals = dict:new() :: dict(), %Format: {Literal,Number} - next_atom = 1 :: pos_integer(), next_import = 0 :: non_neg_integer(), string_offset = 0 :: non_neg_integer(), next_literal = 0 :: non_neg_integer(), @@ -66,13 +65,14 @@ highest_opcode(#asm{highest_opcode=Op}) -> Op. %% atom(Atom, Dict) -> {Index,Dict'} -spec atom(atom(), bdict()) -> {pos_integer(), bdict()}. -atom(Atom, #asm{atoms=Atoms0,next_atom=NextIndex}=Dict) when is_atom(Atom) -> +atom(Atom, #asm{atoms=Atoms0}=Dict) when is_atom(Atom) -> case gb_trees:lookup(Atom, Atoms0) of {value,Index} -> {Index,Dict}; none -> + NextIndex = gb_trees:size(Atoms0) + 1, Atoms = gb_trees:insert(Atom, NextIndex, Atoms0), - {NextIndex,Dict#asm{atoms=Atoms,next_atom=NextIndex+1}} + {NextIndex,Dict#asm{atoms=Atoms}} end. %% Remembers an exported function. @@ -156,14 +156,15 @@ literal(Lit, #asm{literals=Tab0,next_literal=NextIndex}=Dict) -> %% atom_table(Dict) -> {LastIndex,[Length,AtomString...]} -spec atom_table(bdict()) -> {non_neg_integer(), [[non_neg_integer(),...]]}. -atom_table(#asm{atoms=Atoms,next_atom=NumAtoms}) -> +atom_table(#asm{atoms=Atoms}) -> + NumAtoms = gb_trees:size(Atoms), Sorted = lists:keysort(2, gb_trees:to_list(Atoms)), Fun = fun({A,_}) -> L = atom_to_list(A), [length(L)|L] end, AtomTab = lists:map(Fun, Sorted), - {NumAtoms-1,AtomTab}. + {NumAtoms,AtomTab}. %% Returns the table of local functions. %% local_table(Dict) -> {NumLocals, [{Function, Arity, Label}...]} -- cgit v1.2.3