diff --git a/clang/test/CodeGen/unique-internal-linkage-names.cpp b/clang/test/CodeGen/unique-internal-linkage-names.cpp
--- a/clang/test/CodeGen/unique-internal-linkage-names.cpp
+++ b/clang/test/CodeGen/unique-internal-linkage-names.cpp
@@ -53,15 +53,15 @@
 // PLAIN: define weak_odr i32 ()* @_ZL4mverv.resolver()
 // PLAIN: define internal i32 @_ZL4mverv()
 // PLAIN: define internal i32 @_ZL4mverv.sse4.2()
-// UNIQUE: @_ZL4glob.{{[0-9a-f]+}} = internal global
-// UNIQUE: @_ZZ8retAnonMvE5fGlob.{{[0-9a-f]+}} = internal global
-// UNIQUE: @_ZN12_GLOBAL__N_16anon_mE.{{[0-9a-f]+}} = internal global
-// UNIQUE: define internal i32 @_ZL3foov.{{[0-9a-f]+}}()
-// UNIQUE: define internal i32 @_ZN12_GLOBAL__N_14getMEv.{{[0-9a-f]+}}
+// UNIQUE: @_ZL4glob.__uniq.{{[0-9a-f]+}} = internal global
+// UNIQUE: @_ZZ8retAnonMvE5fGlob.__uniq.{{[0-9a-f]+}} = internal global
+// UNIQUE: @_ZN12_GLOBAL__N_16anon_mE.__uniq.{{[0-9a-f]+}} = internal global
+// UNIQUE: define internal i32 @_ZL3foov.__uniq.{{[0-9a-f]+}}()
+// UNIQUE: define internal i32 @_ZN12_GLOBAL__N_14getMEv.__uniq.{{[0-9a-f]+}}
 // UNIQUE: define weak_odr i32 ()* @_ZL4mverv.resolver()
-// UNIQUE: define internal i32 @_ZL4mverv.{{[0-9a-f]+}}()
-// UNIQUE: define internal i32 @_ZL4mverv.sse4.2.{{[0-9a-f]+}}
-// UNIQUEO1: define internal i32 @_ZL3foov.{{[0-9a-f]+}}()
+// UNIQUE: define internal i32 @_ZL4mverv.__uniq.{{[0-9a-f]+}}()
+// UNIQUE: define internal i32 @_ZL4mverv.sse4.2.__uniq.{{[0-9a-f]+}}
+// UNIQUEO1: define internal i32 @_ZL3foov.__uniq.{{[0-9a-f]+}}()
 // UNIQUEO1: define weak_odr i32 ()* @_ZL4mverv.resolver()
-// UNIQUEO1: define internal i32 @_ZL4mverv.{{[0-9a-f]+}}()
-// UNIQUEO1: define internal i32 @_ZL4mverv.sse4.2.{{[0-9a-f]+}}
+// UNIQUEO1: define internal i32 @_ZL4mverv.__uniq.{{[0-9a-f]+}}()
+// UNIQUEO1: define internal i32 @_ZL4mverv.sse4.2.__uniq.{{[0-9a-f]+}}
diff --git a/llvm/lib/Transforms/Utils/UniqueInternalLinkageNames.cpp b/llvm/lib/Transforms/Utils/UniqueInternalLinkageNames.cpp
--- a/llvm/lib/Transforms/Utils/UniqueInternalLinkageNames.cpp
+++ b/llvm/lib/Transforms/Utils/UniqueInternalLinkageNames.cpp
@@ -27,7 +27,9 @@
   Md5.final(R);
   SmallString<32> Str;
   llvm::MD5::stringifyResult(R, Str);
-  std::string ModuleNameHash = (Twine(".") + Twine(Str)).str();
+  // Prepend "__uniq" before the hash for tools like profilers to understand that
+  // this symbol is of internal linkage type.
+  std::string ModuleNameHash = (Twine(".__uniq.") + Twine(Str)).str();
   bool Changed = false;
 
   // Append the module hash to all internal linkage functions.
diff --git a/llvm/test/Transforms/UniqueInternalLinkageNames/unique_symbol_names.ll b/llvm/test/Transforms/UniqueInternalLinkageNames/unique_symbol_names.ll
--- a/llvm/test/Transforms/UniqueInternalLinkageNames/unique_symbol_names.ll
+++ b/llvm/test/Transforms/UniqueInternalLinkageNames/unique_symbol_names.ll
@@ -9,5 +9,5 @@
   ret i32 0
 }
 
-; CHECK: @glob.6ae72bb15a7d1834b42ae042a58f7a4d = internal global
-; CHECK: define internal i32 @foo.6ae72bb15a7d1834b42ae042a58f7a4d()
+; CHECK: @glob.__uniq.6ae72bb15a7d1834b42ae042a58f7a4d = internal global
+; CHECK: define internal i32 @foo.__uniq.6ae72bb15a7d1834b42ae042a58f7a4d()