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| author | Andrew Chow <achow101-github@achow101.com> | 2020-11-21 01:51:48 -0500 |
|---|---|---|
| committer | Wladimir J. van der Laan <laanwj@protonmail.com> | 2020-11-24 16:32:42 +0100 |
| commit | ab23a83400d5ad13137ce0f9697a51f0b70e9d29 (patch) | |
| tree | 23c1c2a46b0738104f74789ff3d48d1c9dcacc2f /COPYING | |
| parent | bf9548bc59458c997baa8b2818c33f399559168a (diff) | |
Fix QPainter non-determinism on macOS
Aplies a patch to Qt that fixes the non-determinism by modifying Qt. The
source of the non-determinism is how LLVM 8 optimizes qt_intersect_spans
when compiling. The particular optimization that seems to be causing the
problems is that a temp variable is being added for spans->y. For some
reason, when it does this, it chooses different instructions to use when
making that variable. We bypass this problem by patching
qt_intersect_spans to always make and use this local variable.
Github-Pull: #20447
Rebased-From: 8f7d1b39efbe65ab2747c593cc3560d4a449a333
Tree-SHA512: 558da5c2bb0373e2a89f2c219170f802036e0e87cc8e808336b23d074152cb893007a440f46ec957156b0921355cd18502710f2d224f27bc26e934c50ebebc41
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions