Arrays are still WIP.
While I'm still working on these, don't fall through to the SSA handler. This can dramatically affect performance for large arrays.

Bug: b/148401179
Change-Id: I77e972f13cf9a1ce2b0d47a883194b6bceb68f4b
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/45351
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>