>
> Please take a look at the .debug_line info in your object file with
> "readelf -wl test.o". I expect you will see negative advances of line
> number, at the address where you see repeated source lines. This is
> normal. Compilers will emit code corresponding to a single line, at
> different locations. This happens even at -O0, particularly around
> loops.
Yes, you are right; I did saw negative advancement.
something like `advance Address by 6 to 0x36 and Line by -1 to 4`.
>
> So you should expect this line
> for (int i = 0; i < N; ++i) {
> to be repeated.
>
> objdump also shows some context lines before the repeated line.
> That's why my_fun appears twice. We could probably fix that.
That would be great. Having function head showing multiple times is
quite confusing.
> You'll also notice repeated source lines after the negative advance of
> line number that don't actually corresponded to code at those
> locations. In this case
> sum += arr[i];
> We can't do much about that..
I see. Anyway, thank you very much for the work and explanation.
--
Best Regards
Yours faithfully
Albert Netymk
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