[flang] [llvm] [flang] Register and lower SECNDS (stubbed implementation) (PR #151878)

[Eugene Epshteyn via llvm-commits]

eugeneepshteyn wrote:

> It's `SECNDSD` and it might be just a PGI extension (also in "classic" flang).

Just to close on this, Peter and I confirmed that the extra intrinsic is `DSECNDS` (and it is a PGI extension).



https://github.com/llvm/llvm-project/pull/151878