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
@@ -183,6 +183,11 @@
     cl::desc("Inline cold call sites in profile loader if it's beneficial "
              "for code size."));
 
+static cl::opt<bool> ProfileInlineFunctions(
+    "sample-profile-inline-functions", cl::Hidden, cl::init(true),
+    cl::desc("If false, turn off inliner in sample profile loader. Used for "
+             "evaluation or debugging."));
+
 cl::opt<int> ProfileInlineGrowthLimit(
     "sample-profile-inline-growth-limit", cl::Hidden, cl::init(12),
     cl::desc("The size growth ratio limit for proirity-based sample profile "
@@ -1113,6 +1118,8 @@
 /// \returns True if there is any inline happened.
 bool SampleProfileLoader::inlineHotFunctions(
     Function &F, DenseSet<GlobalValue::GUID> &InlinedGUIDs) {
+  if (!ProfileInlineFunctions)
+    return false;
   // ProfAccForSymsInList is used in callsiteIsHot. The assertion makes sure
   // Profile symbol list is ignored when profile-sample-accurate is on.
   assert((!ProfAccForSymsInList ||
@@ -1389,7 +1396,8 @@
 
 bool SampleProfileLoader::inlineHotFunctionsWithPriority(
     Function &F, DenseSet<GlobalValue::GUID> &InlinedGUIDs) {
-
+  if (!ProfileInlineFunctions)
+    return false;
   // ProfAccForSymsInList is used in callsiteIsHot. The assertion makes sure
   // Profile symbol list is ignored when profile-sample-accurate is on.
   assert((!ProfAccForSymsInList ||