Matt Turner d2e6be94ae nir: Skip opt_if_merge when next_if has block ending in a jump
Similar to commit 6cef804067 ("nir/opt_if: fix opt_if_merge when
destination branch has a jump"), we shouldn't combine if statements when
the second if-then-else has a block that ends in a jump.

This fixes a case where opt_if_merge combines

    if (cond) {
        [then-block-1]
    } else {
        [else-block-1]
    }

    if (cond) {
        [then-block-2]
    } else {
        [else-block-2]
    }

where `then-block-2` or `else-block-2` ends in a jump. The phi nodes
following the control flow will be incorrectly updated to have an input
from a block that is not a predecessor.

Fixes: 4d3f6cb973 ("nir: merge some basic consecutive ifs")
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30629>
2024-08-15 20:34:54 +00:00
2022-11-22 19:04:13 +00:00
2024-08-14 20:48:19 +02:00
2024-08-05 07:00:10 -07:00
2024-01-24 10:02:10 +00:00
2023-11-02 11:37:46 +00:00
2024-05-13 14:32:12 +00:00
2024-07-19 16:37:23 +00:00

`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library
======================================================


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------

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---------------

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