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-rw-r--r--lib/compiler/src/beam_block.erl1
-rw-r--r--lib/compiler/src/beam_bool.erl2
-rw-r--r--lib/compiler/src/beam_clean.erl2
-rw-r--r--lib/compiler/src/beam_validator.erl31
-rw-r--r--lib/compiler/test/beam_validator_SUITE.erl6
-rw-r--r--lib/compiler/test/beam_validator_SUITE_data/xrange.S4
6 files changed, 24 insertions, 22 deletions
diff --git a/lib/compiler/src/beam_block.erl b/lib/compiler/src/beam_block.erl
index 0b284299be..4e179daa0e 100644
--- a/lib/compiler/src/beam_block.erl
+++ b/lib/compiler/src/beam_block.erl
@@ -24,7 +24,6 @@
-export([module/2]).
-import(lists, [mapfoldl/3,reverse/1,reverse/2,foldl/3,member/2]).
--define(MAXREG, 1024).
module({Mod,Exp,Attr,Fs0,Lc0}, _Opt) ->
{Fs,Lc} = mapfoldl(fun function/2, Lc0, Fs0),
diff --git a/lib/compiler/src/beam_bool.erl b/lib/compiler/src/beam_bool.erl
index 14b6381230..c9e103eae9 100644
--- a/lib/compiler/src/beam_bool.erl
+++ b/lib/compiler/src/beam_bool.erl
@@ -25,8 +25,6 @@
-import(lists, [reverse/1,reverse/2,foldl/3,mapfoldl/3,map/2]).
--define(MAXREG, 1024).
-
-record(st,
{next, %Next label number.
ll %Live regs at labels.
diff --git a/lib/compiler/src/beam_clean.erl b/lib/compiler/src/beam_clean.erl
index 919ee3ee7d..7d66985791 100644
--- a/lib/compiler/src/beam_clean.erl
+++ b/lib/compiler/src/beam_clean.erl
@@ -141,7 +141,7 @@ renumber_labels([{bif,is_record,{f,_},
renumber_labels(Is, Acc, St);
renumber_labels([{test,is_record,{f,_}=Fail,
[Term,{atom,Tag}=TagAtom,{integer,Arity}]}|Is0], Acc, St) ->
- Tmp = {x,1023},
+ Tmp = {x,1022},
Is = case is_record_tuple(Term, Tag, Arity) of
yes ->
Is0;
diff --git a/lib/compiler/src/beam_validator.erl b/lib/compiler/src/beam_validator.erl
index 942d69a756..ab5fedf3bf 100644
--- a/lib/compiler/src/beam_validator.erl
+++ b/lib/compiler/src/beam_validator.erl
@@ -31,8 +31,6 @@
-import(lists, [reverse/1,foldl/3,foreach/2,dropwhile/2]).
--define(MAXREG, 1024).
-
%%-define(DEBUG, 1).
-ifdef(DEBUG).
-define(DBG_FORMAT(F, D), (io:format((F), (D)))).
@@ -970,9 +968,9 @@ get_fls(#vst{current=#st{fls=Fls}}) when is_atom(Fls) -> Fls.
init_fregs() -> 0.
-set_freg({fr,Fr}, #vst{current=#st{f=Fregs0}=St}=Vst)
+set_freg({fr,Fr}=Freg, #vst{current=#st{f=Fregs0}=St}=Vst)
when is_integer(Fr), 0 =< Fr ->
- limit_check(Fr),
+ check_limit(Freg),
Bit = 1 bsl Fr,
if
Fregs0 band Bit =:= 0 ->
@@ -985,9 +983,10 @@ set_freg(Fr, _) -> error({bad_target,Fr}).
assert_freg_set({fr,Fr}=Freg, #vst{current=#st{f=Fregs}})
when is_integer(Fr), 0 =< Fr ->
if
- Fregs band (1 bsl Fr) =/= 0 ->
- limit_check(Fr);
- true -> error({uninitialized_reg,Freg})
+ (Fregs bsr Fr) band 1 =:= 0 ->
+ error({uninitialized_reg,Freg});
+ true ->
+ ok
end;
assert_freg_set(Fr, _) -> error({bad_source,Fr}).
@@ -1066,16 +1065,16 @@ set_type(Type, {x,_}=Reg, Vst) -> set_type_reg(Type, Reg, Vst);
set_type(Type, {y,_}=Reg, Vst) -> set_type_y(Type, Reg, Vst);
set_type(_, _, #vst{}=Vst) -> Vst.
-set_type_reg(Type, {x,X}, #vst{current=#st{x=Xs}=St}=Vst)
+set_type_reg(Type, {x,X}=Reg, #vst{current=#st{x=Xs}=St}=Vst)
when is_integer(X), 0 =< X ->
- limit_check(X),
+ check_limit(Reg),
Vst#vst{current=St#st{x=gb_trees:enter(X, Type, Xs)}};
set_type_reg(Type, Reg, Vst) ->
set_type_y(Type, Reg, Vst).
set_type_y(Type, {y,Y}=Reg, #vst{current=#st{y=Ys0}=St}=Vst)
when is_integer(Y), 0 =< Y ->
- limit_check(Y),
+ check_limit(Reg),
Ys = case gb_trees:lookup(Y, Ys0) of
none ->
error({invalid_store,Reg,Type});
@@ -1591,9 +1590,15 @@ return_type_math(pow, 2) -> {float,[]};
return_type_math(pi, 0) -> {float,[]};
return_type_math(F, A) when is_atom(F), is_integer(A), A >= 0 -> term.
-limit_check(Num) when is_integer(Num), Num >= ?MAXREG ->
- error(limit);
-limit_check(_) -> ok.
+check_limit({x,X}) when is_integer(X), X < 1023 ->
+ %% Note: x(1023) is reserved for use by the BEAM loader.
+ ok;
+check_limit({y,Y}) when is_integer(Y), Y < 1024 ->
+ ok;
+check_limit({fr,Fr}) when is_integer(Fr), Fr < 1024 ->
+ ok;
+check_limit(_) ->
+ error(limit).
min(A, B) when is_integer(A), is_integer(B), A < B -> A;
min(A, B) when is_integer(A), is_integer(B) -> B.
diff --git a/lib/compiler/test/beam_validator_SUITE.erl b/lib/compiler/test/beam_validator_SUITE.erl
index 69391b15eb..d6deb4a730 100644
--- a/lib/compiler/test/beam_validator_SUITE.erl
+++ b/lib/compiler/test/beam_validator_SUITE.erl
@@ -107,13 +107,13 @@ xrange(Config) when is_list(Config) ->
{{bif,'+',{f,0},[{x,-1},{x,1}],{x,0}},4,
{uninitialized_reg,{x,-1}}}},
{{t,sum_2,2},
- {{bif,'+',{f,0},[{x,0},{x,1024}],{x,0}},4,
- {uninitialized_reg,{x,1024}}}},
+ {{bif,'+',{f,0},[{x,0},{x,1023}],{x,0}},4,
+ {uninitialized_reg,{x,1023}}}},
{{t,sum_3,2},
{{bif,'+',{f,0},[{x,0},{x,1}],{x,-1}},4,
{invalid_store,{x,-1},number}}},
{{t,sum_4,2},
- {{bif,'+',{f,0},[{x,0},{x,1}],{x,1024}},4,limit}}] = Errors,
+ {{bif,'+',{f,0},[{x,0},{x,1}],{x,1023}},4,limit}}] = Errors,
ok.
yrange(Config) when is_list(Config) ->
diff --git a/lib/compiler/test/beam_validator_SUITE_data/xrange.S b/lib/compiler/test/beam_validator_SUITE_data/xrange.S
index c6f20288f7..a76408dde3 100644
--- a/lib/compiler/test/beam_validator_SUITE_data/xrange.S
+++ b/lib/compiler/test/beam_validator_SUITE_data/xrange.S
@@ -20,7 +20,7 @@
{label,3}.
{func_info,{atom,t},{atom,sum_2},2}.
{label,4}.
- {bif,'+',{f,0},[{x,0},{x,1024}],{x,0}}.
+ {bif,'+',{f,0},[{x,0},{x,1023}],{x,0}}.
{'%live',1}.
return.
@@ -38,7 +38,7 @@
{label,7}.
{func_info,{atom,t},{atom,sum_4},2}.
{label,8}.
- {bif,'+',{f,0},[{x,0},{x,1}],{x,1024}}.
+ {bif,'+',{f,0},[{x,0},{x,1}],{x,1023}}.
{'%live',1}.
return.