diff options
Diffstat (limited to 'lib/compiler/src/sys_core_fold.erl')
| -rw-r--r-- | lib/compiler/src/sys_core_fold.erl | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index f0f58c767d..570b943a40 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -96,7 +96,7 @@ t=[], %Types in_guard=false}). %In guard or not. --type type_info() :: cerl:cerl() | 'bool'. +-type type_info() :: cerl:cerl() | 'bool' | 'integer'. -type yes_no_maybe() :: 'yes' | 'no' | 'maybe'. -type sub() :: #sub{}. @@ -2511,6 +2511,7 @@ is_boolean_type(Var, Sub) -> is_int_type(Var, Sub) -> case get_type(Var, Sub) of none -> maybe; + integer -> yes; C -> yes_no(cerl:is_c_int(C)) end. @@ -2545,12 +2546,33 @@ update_types_from_expr(V, Expr, Sub) -> Type = extract_type(Expr, Sub), update_types(V, [Type], Sub). +extract_type(#c_call{module=#c_literal{val=erlang}, + name=#c_literal{val=Name}, + args=Args}=Call, Sub) -> + case returns_integer(Name, Args) of + true -> integer; + false -> extract_type_1(Call, Sub) + end; extract_type(Expr, Sub) -> + extract_type_1(Expr, Sub). + +extract_type_1(Expr, Sub) -> case is_bool_expr(Expr, Sub) of false -> Expr; true -> bool end. +returns_integer(bit_size, [_]) -> true; +returns_integer('bsl', [_,_]) -> true; +returns_integer('bsr', [_,_]) -> true; +returns_integer(byte_size, [_]) -> true; +returns_integer(length, [_]) -> true; +returns_integer('rem', [_,_]) -> true; +returns_integer(size, [_]) -> true; +returns_integer(tuple_size, [_]) -> true; +returns_integer(trunc, [_]) -> true; +returns_integer(_, _) -> false. + %% update_types(Expr, Pattern, Sub) -> Sub' %% Update the type database. |