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Re: Designs for better debug info in GCC


Alexandre Oliva <aoliva@redhat.com> writes:

> > How do i know i need to change this DEBUG expression.
> 
> As reassoc looks for sets of variables it can freely mess with, it
> should take note of variables that are used in debug annotations in
> addition to the kind of single (?) non-debug uses it's interested in,
> such that, when it modifies these variables, the annotations can be
> compensated for.

The question is how it finds them efficiently, without doing a scan of
all instructions.

Ian


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