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IDA Pro Screenshot

What are grey dashed lines supposed to represent in IDA? I am new to IDA + new to reverse engineering in general. I originally thought these marked functions that IDA hadn't defined but looking into blocks that don't return etc this probably isn't the case.

Could anyone enlighten me on what these signify?

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  • in a function that is huge when the compiler optimizes it it breaks the functions into chunks by determining​ which code paths would be used most and places them in an order to maximize performance when a disassembler analyses the function it may identify the chunks and would put them in blocks with those markers around it
    – blabb
    Commented Jul 5, 2017 at 3:13

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begin/end of block, may be possible a function or unlink switch table

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