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-- { dg-do run }
-- { dg-options "-gnato" }
procedure Overflow_Sum is
function sum (a, b, c, d, e, f, g, h, i, j, k, l, m,
n, o, p, q, r, s, t, u, v, w, x, y, z : Integer)
return Integer
is
begin
return a + b + c + d + e + f + g + h + i + j + k + l + m
+ n + o + p + q + r + s + t + u + v + w + x + y + z;
end;
f : integer;
begin
f := sum (a => -2**31, b => 1, c => 2**31 - 1, -- 0
d => 1, e => -2**31, f => 2**31 - 1, -- 0
g => 2**0, h => 2, i => 4, -- 2**3 - 1
j => 2**3, k => 2**4, l => 2**5, -- 2**6 - 1
m => 2**6, n => 2**7, o => 2**8, -- 2**9 - 1
p => 2**9, q => 2**10, r => 2**11, -- 2**12 - 1
s => 2**12, t => 2**13, u => 2**14, -- 2**15 - 1
v => 2**15, w => 2**16, x => 2**17, -- 2**18 - 1
y => 2**31 - 2**18, z => 0); -- 2**31 - 1
if f /= 2**31 - 1 then
raise Program_Error;
end if;
begin
f := sum (a => f, b => -2**31, c => 1, -- 0
d => -2**31, e => 1, f => f, -- 0
g => 2**0, h => 2, i => 4, -- 2**3 - 1
j => 2**3, k => 2**4, l => 2**5, -- 2**6 - 1
m => 2**6, n => 2**7, o => 2**8, -- 2**9 - 1
p => 2**9, q => 2**10, r => 2**11, -- 2**12 - 1
s => 2**12, t => 2**13, u => 2**14, -- 2**15 - 1
v => 2**15, w => 2**16, x => 2**17, -- 2**18 - 1
y => 2**31 - 2**18, z => 1); -- 2**31 (overflow)
raise Program_Error;
exception
when Constraint_Error => null;
end;
end;
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