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MaxGraey
reviewed
Sep 12, 2022
tlively
approved these changes
Sep 12, 2022
| if (leftMaxBits < getBitsForType(type)) { | ||
| using namespace Abstract; | ||
| auto rightMinBits = Bits::getMinBits(curr->right); | ||
| auto rightIsSigned = rightMinBits == getBitsForType(type); |
Co-authored-by: Thomas Lively <7121787+tlively@users.noreply.github.com>
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When we see e.g.
x < yandxhas fewer bits set, we can infer a result.Helps #5010. As mentioned there, this is one of the top superoptimizer findings.
On j2wasm it ends up removing a few hundred binary operations for example.