Currently, for self-recursive call, we never use value originated from non-passthrough
jump function as source to avoid propagation explosion, but self-dependent value is
missed. This patch is made to fix the bug.

Bootstrapped/regtested on x86_64-linux and aarch64-linux.

Feng
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2020-02-18  Feng Xue  <fxue@os.amperecomputing.com>

        PR ipa/93763
        * ipa-cp.c (self_recursively_generated_p): Mark self-dependent value as
        self-recursively generated.