[Bug 75224] GLSL: vectorize optimization goes wrong on dot products

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75224

--- Comment #2 from Aras Pranckevicius <aras at unity3d.com> ---
Locally I could fix this with:

/* Upon entering an ir_binop_dot, remove the current assignment from
 * further consideration. Dot product is "horizontal" instruction
 * that we can't vectorize.
 */
ir_visitor_status
ir_vectorize_visitor::visit_enter(ir_expression *ir)
{
   if (ir->operation == ir_binop_dot) {
      this->current_assignment = NULL;
      return visit_continue_with_parent;
   }
   return visit_continue;
}


But not sure if that's the correct approach.

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