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  1. Qt
  2. QTBUG-104462

qmlsc miscompiles JavaScript functions with arguments

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    • c8e43ea02d (qt/tqtc-qmlcompilerplus/6.2) 00af216756 (qt/qtdeclarative/6.3) 00af216756 (qt/tqtc-qtdeclarative/6.3) 6a0ab2e8aa (qt/qtdeclarative/dev) 6a0ab2e8aa (qt/tqtc-qtdeclarative/dev) 2a6dc98540 (qt/qtdeclarative/6.4)

    Description

      The following generates invalid code:

      pragma Strict
import QtQml

QtObject {
    function absMinusOne(amount: real) : real {
        if (amount < 0)
            amount = -amount;
        return amount - 1;
    }

    property real a: absMinusOne(-5)
    property real b: absMinusOne(10)
}

      Produces -6 for property 'a'. In the "amount - 1" expression it doesn't use the register it stores the new amount in, but rather the original argument.

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          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-104665 Basic blocks pass wrongly optimizes indirect register reads out

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
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              ulherman Ulf Hermann
              ulherman Ulf Hermann
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              Dates

                Created:
                Updated:
                Resolved: