tree d884c8472c87e265a426fe8088495d7c2dcd827b
parent 157c1834b3a1c316348a51c6d049c0db2fbde86e
author Ting-Yu Lin <tlin@mozilla.com> 1629874383 +0000
committer moz-wptsync-bot <wptsync@mozilla.com> 1629928341 +0100

Part 2 - Use 64-bit coord type when resolving the main size for flex items.

The idea of this patch is to use 64-bit coord type when resolving the
main size for flex items to avoid integer overflow when individual flex
items have huge hypothetical main sizes, which can happen with
percent-width table-layout:fixed descendants. We have to avoid integer
overflow to shrink flex items properly in that scenario.

Delete the "Note:" in `AddLastItemToMainSizeTotals()` since we remove
`AddChecked()` in favor of regular 64-bit addition for
`mTotalOuterHypotheticalMainSize`.

The wpt testcase is adapted from bug 1469649 comment 12.

Differential Revision: https://phabricator.services.mozilla.com/D123268

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1469649
gecko-commit: f0b07571b559937fe98300d7da187b2043ac9e91
gecko-reviewers: dholbert