[PGO] add target md5sum in warning message for icall

Differential revision: http://reviews.llvm.org/D51193

llvm-svn: 340657
diff --git a/llvm/lib/Transforms/Instrumentation/IndirectCallPromotion.cpp b/llvm/lib/Transforms/Instrumentation/IndirectCallPromotion.cpp
index 27fb0e4..d839dd2 100644
--- a/llvm/lib/Transforms/Instrumentation/IndirectCallPromotion.cpp
+++ b/llvm/lib/Transforms/Instrumentation/IndirectCallPromotion.cpp
@@ -269,7 +269,8 @@
       LLVM_DEBUG(dbgs() << " Not promote: Cannot find the target\n");
       ORE.emit([&]() {
         return OptimizationRemarkMissed(DEBUG_TYPE, "UnableToFindTarget", Inst)
-               << "Cannot promote indirect call: target not found";
+               << "Cannot promote indirect call: target with md5sum "
+               << ore::NV("target md5sum", Target) << " not found";
       });
       break;
     }