array literals and the read only segment

[Johan Engelen via Digitalmars-d]

On Monday, 12 December 2016 at 06:28:09 UTC, Shachar Shemesh 
wrote:
> 
> DMD 2.072.1 and ldc 2.070.2
>
> It's easy to verify. Just create a large array (1M) and check 
> the segment sizes of the result.

For LDC, it depends whether the variables are defined inside a 
function or not.

```
immutable ubyte[] array1 = [ 1, 2, 3, 4 ]; // ends up in data 
section
immutable ubyte[] array2 = cast(immutable ubyte[]) x"01 02 03 
04"; // not in data section

void foo()
{
     // Both initializers are _not_ put in the data section.
     immutable ubyte[] array1 = [ 1, 2, 3, 4 ];
     immutable ubyte[] array2 = cast(immutable ubyte[]) x"01 02 03 
04";
}
```

The module-scope variable's initializer ending up in the data 
section is a bug I think, but I have not thought it through 
enough.

-Johan