[Mesa-dev] [Bug 102274] assertion failure in ir_validate.cpp:240

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102274

--- Comment #1 from Brian Paul <brianp at vmware.com> ---
I bisected the regression to this commit:

commit e2e2c5abd279df1b3aa99c52b81c9cb48fea35fb
Author: Timothy Arceri <tarceri at itsqueeze.com>
Date:   Wed Aug 9 13:34:02 2017 +1000

    glsl: calculate number of operands in an expression once

    Extra validation is added to ir_validate to make sure this is
    always updated to the correct numer of operands, as passes like
    lower_instructions modify the instructions directly rather then
    generating a new one.

    The reduction in time is so small that it is not really
    measurable. However callgrind was reporting this function as
    being called just under 34 million times while compiling the
    Deus Ex shaders (just pre-linking was profiled) with 0.20%
    spent in this function.

    v2:
     - make num_operands a unit8_t
     - fix unsigned/signed mismatches

    Reviewed-by: Thomas Helland <thomashelland90 at gmail.com>

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