Index: llvm/lib/Transforms/IPO/SampleProfile.cpp
===================================================================
--- llvm/lib/Transforms/IPO/SampleProfile.cpp
+++ llvm/lib/Transforms/IPO/SampleProfile.cpp
@@ -153,7 +153,7 @@
              "profile loader decided not to inline a call site."));
 
 static cl::opt<bool> ProfileTopDownLoad(
-    "sample-profile-top-down-load", cl::Hidden, cl::init(false),
+    "sample-profile-top-down-load", cl::Hidden, cl::init(true),
     cl::desc("Do profile annotation and inlining for functions in top-down "
              "order of call graph during sample profile loading."));
 
Index: llvm/test/Transforms/SampleProfile/inline-topdown.ll
===================================================================
--- llvm/test/Transforms/SampleProfile/inline-topdown.ll
+++ llvm/test/Transforms/SampleProfile/inline-topdown.ll
@@ -1,10 +1,10 @@
 ; Note that this needs new pass manager for now. Passing `-sample-profile-top-down-load` to legacy pass manager is a no-op.
 
 ; Test we aren't doing specialization for inlining with default source order
-; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/inline-topdown.prof -S | FileCheck -check-prefix=DEFAULT %s
+; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/inline-topdown.prof -sample-profile-top-down-load=false -S | FileCheck -check-prefix=DEFAULT %s
 
 ; Test we specialize based on call path with context-sensitive profile while inlining with '-sample-profile-top-down-load'
-; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/inline-topdown.prof -sample-profile-merge-inlinee -sample-profile-top-down-load -S | FileCheck -check-prefix=TOPDOWN  %s
+; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/inline-topdown.prof -sample-profile-merge-inlinee -sample-profile-top-down-load=true -S | FileCheck -check-prefix=TOPDOWN  %s
 
 
 @.str = private unnamed_addr constant [11 x i8] c"sum is %d\0A\00", align 1