[aarch64-port-dev ] 8219993: AArch64: Compiled CI stubs are unsafely modified

[Andrew Haley]

Here's a simpler patch. All I do this time is insert an ISB between the
call and the load instructions so that we don't have a stale instruction
buffer.

I also took the opportunity to unify some code which was duplicated in
C1 and compiledIC_aarch64.

Andrew Dinn, please approve this one. :-)

http://cr.openjdk.java.net/~aph/8219993.2/

-- 
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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