[ccache] Support for -fprofile-generate, -fprofile-use, -fprofile-arcs

Chris AtLee chris at atlee.ca
Tue Aug 2 10:05:46 MDT 2011

If you use the same .gcda files with -fprofile-use, then you do get
cache hits. However, running even a simple program with no loops or
branches twice in a row generates different .gcda files, which then
results in cache misses. So I'm not sure how useful the -fprofile-use
side of things is in general.

On Tue, Aug 2, 2011 at 11:17 AM, Justin Lebar <justin.lebar at gmail.com> wrote:
> Catlee,
> Have you done any experiments to determine whether this actually gets
> cache hits with -fprofile-use?  That is, do you ever get identical
> .gcda files?  They could have a timestamp or something inside...
> -Justin
> On Mon, Aug 1, 2011 at 9:52 PM, Chris AtLee <chris at atlee.ca> wrote:
>> Thanks again for all your feedback.
>> My latest code on github should address all the comments so far:
>> https://github.com/catlee/ccache/compare/jrosdahl:master...catlee:profile
>> Keep the feedback coming!
>> Cheers,
>> Chris

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