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2012 Aug 15
2
[LLVMdev] clang promoting local to global
I have a const array allocated inside a function and the IR is showing this
has a global function (ie. there is no allocation for the space inside the
function).
For example:
const int32 local_array[256] = {constValue, constValue, ..... }
Is there any particular reason this may be occuring?
Thanks.
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2012 Aug 15
0
[LLVMdev] clang promoting local to global
...d, Aug 15, 2012 at 11:26 AM, Ryan Taylor <ryta1203 at gmail.com> wrote:
> I have a const array allocated inside a function and the IR is showing this
> has a global function (ie. there is no allocation for the space inside the
> function).
>
> For example:
>
> const int32 local_array[256] = {constValue, constValue, ..... }
>
> Is there any particular reason this may be occuring?
It's an optimization; IIRC, you can turn it off with -fno-merge-all-constants.
-Eli
2012 Aug 15
2
[LLVMdev] clang promoting local to global
...ryta1203 at gmail.com> wrote:
> > I have a const array allocated inside a function and the IR is showing
> this
> > has a global function (ie. there is no allocation for the space inside
> the
> > function).
> >
> > For example:
> >
> > const int32 local_array[256] = {constValue, constValue, ..... }
> >
> > Is there any particular reason this may be occuring?
>
> It's an optimization; IIRC, you can turn it off with
> -fno-merge-all-constants.
>
> -Eli
>
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