aco: ignore the ACO-inserted continue in create_continue_phis()

Otherwise, for loops without continue_or_break, create_continue_phis()
always returns an undef operand.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Fixes: 638cbc21a1c ("aco: handle when ACO adds new continue edges")
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/2848
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7148>
1 file changed