ivanbaev added a subscriber: ivanbaev.
================
Comment at: lib/CodeGen/CodeGenPGO.cpp:858
@@ +857,3 @@
+ if (PGOReader && haveRegionCounts()) {
+ // We record the top most called five function at each call site.
+ // Profile metadata contains "indirect_call_targets" string identifying
----------------
davidxl wrote:
> 5 is too large as the default value. I suggest change the default to 2
> targets and also make it controllable via an internal option.
3 is perhaps better; in the indirect call promotion pass we try to promote 2
targets, and it would be good to know what the hotness for the next target is.
http://reviews.llvm.org/D8940
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