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[PATCH] Indirect-call topn targets profiler (instrumentation)


Hi,

I ported the indirect-call topn target profile from google branch. It
implements the algorithm described in "Value profiling and
optimization" by Brad Calder and Peter Feller. This patch is about the
instrumentation. When --param=indir-call-topn-profile=1 is specified,
we will use indirection-call-topn profiler in this patch, instead of
indirect_call_profiler_v2.

Tested with gcc regression tests and the runtime patch (in a separated patch).

Thanks,

-Rong

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