RFR(XL): 8185640: Thread-local handshakes

[Andrew Haley]

Do we know hat this is always correct for C2?  Could we not have
something like

    ldr r0, [rthread, #polling_page_offset]

loop:
    ldr rscratch, [r0]  {poll}
    cmp foo, bar
    bne loop

when C2 hoists the load of the polling page address out of a loop?

Or is such hoisting disable for this case?

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