diff --git a/gcc/ada/sem_res.adb b/gcc/ada/sem_res.adb index 3574afd19ac..4bbec65d6a0 100644 --- a/gcc/ada/sem_res.adb +++ b/gcc/ada/sem_res.adb @@ -10105,11 +10105,11 @@ package body Sem_Res is then T := Etype (R); - -- If the left operand is of a universal numeric type and the right - -- operand is not, we do not resolve the operands to the tested type - -- but to the universal type instead. If not conforming to the letter, - -- it's conforming to the spirit of the specification of membership - -- tests, which are typically used to guard a specific operation and + -- If the type of the left operand is universal_integer and that of the + -- right operand is smaller, then we do not resolve the operands to the + -- tested type but to universal_integer instead. If not conforming to + -- the letter, it's conforming to the spirit of the specification of + -- membership tests, which are typically used to guard an operation and -- ought not to fail a check in doing so. Without this, in the case of -- type Small_Length is range 1 .. 16; @@ -10122,10 +10122,14 @@ package body Sem_Res is -- the function Is_Small_String would fail a range check for strings -- larger than 127 characters. + -- The test on the size is required in GNAT because universal_integer + -- does not cover all the values of all the supported integer types, + -- for example the large values of Long_Long_Long_Unsigned. + elsif not Is_Overloaded (L) - and then Is_Universal_Numeric_Type (Etype (L)) + and then Etype (L) = Universal_Integer and then (Is_Overloaded (R) - or else not Is_Universal_Numeric_Type (Etype (R))) + or else RM_Size (Etype (R)) < RM_Size (Universal_Integer)) then T := Etype (L);