Function eliminate_dead_code 

pub fn eliminate_dead_code(
    instructions: &[Instruction],
) -> (Vec<Instruction>, usize)

Remove instructions whose results are never used.

Performs iterative dead code elimination until a fixed point is reached: each pass removes instructions that define registers not consumed by any other instruction, provided the instruction has no side effects.

Arguments

• instructions - The original instruction sequence.

Returns

A tuple of (optimized_instructions, eliminated_count).