https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114342
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Severity|normal |enhancement
Last reconfirmed| |2024-03-14
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
If you change `arr` to be: `static const int arr[]`. then GCC can do it with
only one memcpy.
So basically GCC does not know it remove arr from being a stack variable.
clang/LLVM is able to figure that out but it definitely requires inlining to do
that.
```
arr = *.LC0;
...
__builtin_memcpy (_21, &arr, 444);
```
Basically GCC does not realize it can "remove" the local variable arr here.
Note there are duplicates of this bug report already too.
