r264681 - [PGO] More comments how function pointers for indirect calls are mapped

[Adam Nemet via cfe-commits]

Author: anemet
Date: Mon Mar 28 17:18:53 2016
New Revision: 264681

URL: http://llvm.org/viewvc/llvm-project?rev=264681&view=rev
Log:
[PGO] More comments how function pointers for indirect calls are mapped
to function names

Summary:
Hopefully this will make it easier for the next person to figure all
this out...

Reviewers: bogner, davidxl

Subscribers: davidxl, cfe-commits

Differential Revision: http://reviews.llvm.org/D18489

Modified:
    cfe/trunk/lib/CodeGen/CGCall.cpp

Modified: cfe/trunk/lib/CodeGen/CGCall.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGCall.cpp?rev=264681&r1=264680&r2=264681&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGCall.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGCall.cpp Mon Mar 28 17:18:53 2016
@@ -3817,7 +3817,9 @@ RValue CodeGenFunction::EmitCall(const C
   CS.setAttributes(Attrs);
   CS.setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv));
 
-  // Insert instrumentation or attach profile metadata at indirect call sites
+  // Insert instrumentation or attach profile metadata at indirect call sites.
+  // For more details, see the comment before the definition of
+  // IPVK_IndirectCallTarget in InstrProfData.inc.
   if (!CS.getCalledFunction())
     PGO.valueProfile(Builder, llvm::IPVK_IndirectCallTarget,
                      CS.getInstruction(), Callee);