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George Wort authored
This is a reland of commit aa541f1c Original change's description: > [turbofan][arm64] Emit Lsl for Int32MulWithOverflow when possible > > Int32MulWithOverflow on arm64 uses a cmp to set flags rather than > the multiply instruction itself, thus we can use a left shift when > the multiplication is by a power of two. > > This provides 0.15% for Speedometer2 on a Neoverse-N1 machine, > with React being improved by 0.45%. > > Change-Id: Ic8db42ecc7cb14cf1ac7bbbeab0e9d8359104351 > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3829472 > Commit-Queue: George Wort <george.wort@arm.com> > Reviewed-by: Nico Hartmann <nicohartmann@chromium.org> > Cr-Commit-Position: refs/heads/main@{#82499} Change-Id: Ib8f387bd41d283df551299f7ee98e72d39e2a3bd Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3865484 Commit-Queue: George Wort <george.wort@arm.com> Reviewed-by: Nico Hartmann <nicohartmann@chromium.org> Cr-Commit-Position: refs/heads/main@{#82909}
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