diff --git a/llvm/test/Other/opt-hot-cold-split.ll b/llvm/test/Other/opt-hot-cold-split.ll
--- a/llvm/test/Other/opt-hot-cold-split.ll
+++ b/llvm/test/Other/opt-hot-cold-split.ll
@@ -1,8 +1,8 @@
 ; RUN: opt -mtriple=x86_64-- -Os -hot-cold-split=true -debug-pass=Structure < %s -o /dev/null 2>&1 | FileCheck %s -check-prefix=DEFAULT-Os
-; RUN: opt -mtriple=x86_64-- -Os -hot-cold-split=true -passes='lto-pre-link<Os>' -debug-pass-manager < %s -o /dev/null 2>&1 | FileCheck %s -check-prefix=LTO-PRELINK-Os
-; RUN: opt -mtriple=x86_64-- -Os -hot-cold-split=true -passes='thinlto-pre-link<Os>' -debug-pass-manager < %s -o /dev/null 2>&1 | FileCheck %s -check-prefix=THINLTO-PRELINK-Os
-; RUN: opt -mtriple=x86_64-- -Os -hot-cold-split=true -passes='lto<Os>' -debug-pass-manager < %s -o /dev/null 2>&1 | FileCheck %s -check-prefix=LTO-POSTLINK-Os
-; RUN: opt -mtriple=x86_64-- -Os -hot-cold-split=true -passes='thinlto<Os>' -debug-pass-manager < %s -o /dev/null 2>&1 | FileCheck %s -check-prefix=THINLTO-POSTLINK-Os
+; RUN: opt -mtriple=x86_64-- -hot-cold-split=true -passes='lto-pre-link<Os>' -debug-pass-manager < %s -o /dev/null 2>&1 | FileCheck %s -check-prefix=LTO-PRELINK-Os
+; RUN: opt -mtriple=x86_64-- -hot-cold-split=true -passes='thinlto-pre-link<Os>' -debug-pass-manager < %s -o /dev/null 2>&1 | FileCheck %s -check-prefix=THINLTO-PRELINK-Os
+; RUN: opt -mtriple=x86_64-- -hot-cold-split=true -passes='lto<Os>' -debug-pass-manager < %s -o /dev/null 2>&1 | FileCheck %s -check-prefix=LTO-POSTLINK-Os
+; RUN: opt -mtriple=x86_64-- -hot-cold-split=true -passes='thinlto<Os>' -debug-pass-manager < %s -o /dev/null 2>&1 | FileCheck %s -check-prefix=THINLTO-POSTLINK-Os
 
 ; REQUIRES: asserts
 
diff --git a/llvm/tools/opt/opt.cpp b/llvm/tools/opt/opt.cpp
--- a/llvm/tools/opt/opt.cpp
+++ b/llvm/tools/opt/opt.cpp
@@ -746,6 +746,18 @@
     for (const auto &P : PassList) {
       Passes.push_back(P->getPassArgument());
     }
+    if (OptLevelO0)
+      Passes.push_back("default<O0>");
+    if (OptLevelO1)
+      Passes.push_back("default<O1>");
+    if (OptLevelO2)
+      Passes.push_back("default<O2>");
+    if (OptLevelO3)
+      Passes.push_back("default<O3>");
+    if (OptLevelOs)
+      Passes.push_back("default<Os>");
+    if (OptLevelOz)
+      Passes.push_back("default<Oz>");
     OutputKind OK = OK_NoOutput;
     if (!NoOutput)
       OK = OutputAssembly