diff --git a/llvm/include/llvm/Analysis/InlineCost.h b/llvm/include/llvm/Analysis/InlineCost.h
--- a/llvm/include/llvm/Analysis/InlineCost.h
+++ b/llvm/include/llvm/Analysis/InlineCost.h
@@ -67,10 +67,10 @@
   };
 
   /// The estimated cost of inlining this callsite.
-  int Cost;
+  int Cost = 0;
 
   /// The adjusted threshold against which this cost was computed.
-  int Threshold;
+  int Threshold = 0;
 
   /// Must be set for Always and Never instances.
   const char *Reason = nullptr;
@@ -160,7 +160,7 @@
 
 struct InlineParams {
   /// The default threshold to start with for a callee.
-  int DefaultThreshold;
+  int DefaultThreshold = 0;
 
   /// Threshold to use for callees with inline hint.
   Optional<int> HintThreshold;
@@ -240,6 +240,6 @@
 
 /// Minimal filter to detect invalid constructs for inlining.
 InlineResult isInlineViable(Function &Callee);
-}
+} // namespace llvm
 
 #endif