AND gate output says 'optimized'

Why the lower AND gate output says 'optimized'?

Answer 1

[Shadaab Siddiqie]

From my understanding you want to know why display port value of AND gate says 'optimized'. This is because Simulink cannot obtain the signal value due to optimization. In Normal mode, this message appears for blocks with Conditional input branch execution enabled. For more information, see Conditionally Executed Subsystems Overview.