[InlineCost] Add more debug during inline cost computation.

llvm-svn: 311370
diff --git a/llvm/lib/Analysis/InlineCost.cpp b/llvm/lib/Analysis/InlineCost.cpp
index 6f5770b1c..1567a68 100644
--- a/llvm/lib/Analysis/InlineCost.cpp
+++ b/llvm/lib/Analysis/InlineCost.cpp
@@ -1700,7 +1700,7 @@
     return llvm::InlineCost::getNever();
 
   DEBUG(llvm::dbgs() << "      Analyzing call of " << Callee->getName()
-                     << "...\n");
+                     << "... (caller:" << Caller->getName() << ")\n");
 
   CallAnalyzer CA(CalleeTTI, GetAssumptionCache, GetBFI, PSI, *Callee, CS,
                   Params);