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George Wort authored
This reverts commit aa541f1c. Reason for revert: Reverting due to large regressions for motionmark on M1. 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: I896530a53fbdf6d397922124abddda4140144448 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3854222Reviewed-by: Nico Hartmann <nicohartmann@chromium.org> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com> Commit-Queue: George Wort <george.wort@arm.com> Cr-Commit-Position: refs/heads/main@{#82696}
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instruction-selector-arm64-unittest.cc |