aco: Fix how p_is_helper interacts with optimizations.
p_is_helper doesn't have any operands, so ACO's value numbering and/or the pre-RA optimizer could incorrectly recognize two such instructions as the same. This patch adds exec as an operand to p_is_helper in order to achieve correct behavior. Cc: mesa-stable Closes: mesa/mesa#5570 Signed-off-by:Timur Kristóf <timur.kristof@gmail.com> Reviewed-by:
Daniel Schürmann <daniel@schuermann.dev> Part-of: <mesa/mesa!13577> (cherry picked from commit d80c7f34)