[Bug target/97160] Regression from GCC 8 optimizing to sincos on ppc64le

[fx at gnu dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97160

--- Comment #2 from Dave Love <fx at gnu dot org> ---
(In reply to Richard Biener from comment #1)
> gcc/fortran/f95-lang.c:  if (targetm.libc_has_function (function_sincos))

I haven't checked why it's used there, but I concluded this wasn't a front end
issue from the relevant dump from x86_64 gcc 10, which didn't have the sincos
which appears in the end.

Thanks for the hint, especially as the different glibc in AT is suggestive.  I
don't know the internals these days.  However, the condition is always true
with glibc as far as I can tell from the source (confirmed with gdb), and
sincos does appear in the profile, so it doesn't seem to be that.

> not sure how you configure your compiler?  What OS are you on?

It's on RHEL7.  I built it with spack (if you know that) because the system
doesn't have several of the development libraries, but I think it's fairly
vanilla.  I can get the gfortran -v output later.