What is this GIMPLE?

[Richard Biener]

On Wed, Aug 25, 2021 at 7:30 AM Gary Oblock via Gcc <gcc@gcc.gnu.org> wrote:
>
> I print out a bit of GIMPLE for a program and it looks like this:
>
>   <bb 3> [local count: 13634385]:
>   # a_1 = PHI <a_320(D)(2), a_318(118)>
>   # n_11 = PHI <n_321(D)(2), n_319(118)>
> loop:
>   # DEBUG n => n_11
>   # DEBUG a => a_1
>   _2 = (long unsigned int) a_1;
>   _3 = _2 & 7;
>   _347 = _3 != 0;
>
> That bit that says "loop:" isn't a GIMPLE_LABEL and
> it has operands, the first of which is "size_t n = size_t;"
> and I find that a bit odd...

I'm sure it is a GIMPLE_LABEL.

> What is this thing and what does it do? Note, I'm trying to
> parse and transform some GIMPLE and this is confusing my
> code (and me.) I looked in the internals doc and grepped the
> code but I'm still in the dark.
>
> Note,I'd like be able to detect and ignore this if it's just informational.
>
> Thanks,
>
> Gary
>
> Gary
>
>
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