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[AArch64] Don't generate st2 for 64bit store that can use stp #69901

Merged
merged 1 commit into from
Oct 23, 2023
Merged

[AArch64] Don't generate st2 for 64bit store that can use stp #69901

merged 1 commit into from
Oct 23, 2023
+67 −52

Commits on Oct 23, 2023

  1. [AArch64] Don't generate st2 for 64bit store that can use stp 

    D142966 made it so that st2 that do not start at element 0 use zip2 instead of
st2. This extends that to any 64bit store that has a nearby load that can
better become a LDP operation, which is expected to have a higher throughput.
It searches up to 20 instructions away for a store to p+16 or p-16.
    @davemgreen
    davemgreen committed Oct 23, 2023
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