[Issue 9466] Compiler crash with code-coverage generation with large files

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9466


Walter Bright <bugzilla at digitalmars.com> changed:

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--- Comment #7 from Walter Bright <bugzilla at digitalmars.com> 2013-05-21 22:53:23 PDT ---
(In reply to comment #2)
> covb is allocated via:
> 
> covb = (unsigned *)calloc((numlines + 32) / 32, sizeof(*covb));
> 
> I would sure like to understand the meaning of this magical expression. Why is
> it dividing by 32? Another case of premature optimization?

covb is a bit vector, it must have numlines bits in it. Since unsigned's are 32
bits wide, it rounds it up to the number of 32 bit unsigned's to allocate.

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