diff --git a/llvm/lib/Transforms/IPO/SampleProfile.cpp b/llvm/lib/Transforms/IPO/SampleProfile.cpp
--- a/llvm/lib/Transforms/IPO/SampleProfile.cpp
+++ b/llvm/lib/Transforms/IPO/SampleProfile.cpp
@@ -872,17 +872,15 @@
       // profile will be used to prorate callsites from the callee if
       // inlined. Once not inlined, the direct callsite distribution should
       // be prorated so that the it will reflect the real callsite counts.
-      setProbeDistributionFactor(CI, Candidate.CallsiteDistribution * Sum /
-                                         SumOrigin);
+      setProbeDistributionFactor(CI, 1.0 * Sum / SumOrigin);
       Candidate.CallInstr = DI;
       if (isa<CallInst>(DI) || isa<InvokeInst>(DI)) {
         bool Inlined = tryInlineCandidate(Candidate, InlinedCallSite);
         if (!Inlined) {
           // Prorate the direct callsite distribution so that it reflects real
           // callsite counts.
-          setProbeDistributionFactor(*DI, Candidate.CallsiteDistribution *
-                                              Candidate.CallsiteCount /
-                                              SumOrigin);
+          setProbeDistributionFactor(*DI,
+                                     1.0 * Candidate.CallsiteCount / SumOrigin);
         }
         return Inlined;
       }