diff --git a/lib/CodeGen/BackendUtil.cpp b/lib/CodeGen/BackendUtil.cpp
index e244734..d175bd5 100644
--- a/lib/CodeGen/BackendUtil.cpp
+++ b/lib/CodeGen/BackendUtil.cpp
@@ -184,7 +184,11 @@
   }
   case CodeGenOptions::OnlyAlwaysInlining:
     // Respect always_inline.
-    PMBuilder.Inliner = createAlwaysInlinerPass();
+    if (OptLevel == 0)
+      // Do not insert lifetime intrinsics at -O0.
+      PMBuilder.Inliner = createAlwaysInlinerPass(false);
+    else
+      PMBuilder.Inliner = createAlwaysInlinerPass();
     break;
   }