Is it possible to use something like -fno-vectorize -fno-slp-vectorize -fno-unroll-loops in flang?

[zzhang77]

I am currently testing a pass which needs to run before vectorization and loop unrolling.

In clang, it can be done by
clang -O3 -S test.c -fno-unroll-loops -fno-vectorize -fno-slp-vectorize
After that, the pass can be successfully implemented using opt tool.

When it applies to Fortran, is there any way to disable these passes during O3 (or O1)?

Thanks :)

[bryanpkc]

-fno-unroll-loops, -fno-vectorize, and -fno-slp-vectorize should also work with flang. You can confirm by running flang with -v and observing the options passed to clang-15 -cc1.