Live range information

Ian Lance Taylor iant@google.com
Tue May 10 14:28:00 GMT 2011


Vijayaraghavan Murali <vijayaraghavan2k5@gmail.com> writes:

> I'm wondering if there is a way to make gcc dump variables' live range
> information (using DWARF or otherwise). To be precise what I'm looking for
> is something like: 'a' is live from line 3 to 10, 'b' is live from line 4 to
> 8, etc in some specified format. Is this possible in gcc?

There is nothing so simple, no.  You could take a look at
-fdump-rtl-vartrack-details.  That file will only be generated if you
compile with -g -fvar-tracking.

The information is there if you modify the source code.  The file
gcc/var-tracking.c would be a good place to start.

Ian



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