[Webkit-unassigned] [Bug 150958] New: B3::reduceStrength should canonicalize integer comparisons

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=150958

            Bug ID: 150958
           Summary: B3::reduceStrength should canonicalize integer
                    comparisons
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fpizlo at apple.com

Integer comparisons are not necessarily commutative, but you can swap the operands if you also flip the comparison - for example you can turn LessThan(const, var) into GreaterThan(var, const).  We should use this property to "sort" the operands the same way we do for commutative operations.

This will let us get rid of a lot of cases in the B3::lowerToAir() pattern matching.

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