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JIT: Check for potential store-to-load forwarding before reordering ldr -> ldp #105695

Merged
merged 1 commit into from
Aug 1, 2024
Merged

JIT: Check for potential store-to-load forwarding before reordering ldr -> ldp #105695

merged 1 commit into from
Aug 1, 2024

Commits on Jul 30, 2024

  1. JIT: Check for potential store-to-load forwarding before reordering l… 

    …dr -> ldp

Very targeted fix for dotnet#93401 and dotnet#101437: before reordering two
indirections, check if there is a potential store in the same loop that
looks like it could end up being a candidate for store-to-load
forwarding into one of those indirections. Some hardware does not handle
store-to-load forwarding with the same fidelity when `stp`/`ldp` is
involved compared to multiple `str`/`ldr`.

If we detect the situation then avoid doing the reordering.
    @jakobbotsch
    jakobbotsch committed Jul 30, 2024
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