Index: lib/Target/AArch64/AArch64InstrInfo.cpp
===================================================================
--- lib/Target/AArch64/AArch64InstrInfo.cpp
+++ lib/Target/AArch64/AArch64InstrInfo.cpp
@@ -4989,6 +4989,13 @@
   if (!OutlineFromLinkOnceODRs && F.hasLinkOnceODRLinkage())
     return false;
 
+  // Don't outline from functions with section markings; the program could
+  // expect that all the code is in the named section.
+  // FIXME: Allow outlining from multiple functions with the same section
+  // marking.
+  if (F.hasSection())
+    return false;
+
   // Outlining from functions with redzones is unsafe since the outliner may
   // modify the stack. Check if hasRedZone is true or unknown; if yes, don't
   // outline from it.
Index: test/CodeGen/AArch64/machine-outliner.ll
===================================================================
--- test/CodeGen/AArch64/machine-outliner.ll
+++ test/CodeGen/AArch64/machine-outliner.ll
@@ -17,6 +17,21 @@
   ret void
 }
 
+define void @turtle() section "TURTLE,turtle" {
+  ; CHECK-LABEL: _turtle:
+  ; ODR-LABEL: _turtle:
+  ; CHECK-NOT: OUTLINED
+  %1 = alloca i32, align 4
+  %2 = alloca i32, align 4
+  %3 = alloca i32, align 4
+  %4 = alloca i32, align 4
+  store i32 0, i32* %1, align 4
+  store i32 1, i32* %2, align 4
+  store i32 2, i32* %3, align 4
+  store i32 3, i32* %4, align 4
+  ret void
+}
+
 define void @cat() #0 {
   ; CHECK-LABEL: _cat:
   ; CHECK: [[OUTLINED:OUTLINED_FUNCTION_[0-9]+]]