+; RUN: llc < %s -tailcallopt -mcpu=generic -mtriple=x86_64-linux -post-RA-scheduler=true | FileCheck %s
+; RUN: llc < %s -tailcallopt -mcpu=generic -mtriple=x86_64-win32 -post-RA-scheduler=true | FileCheck %s
+
+; FIXME: Redundant unused stack allocation could be eliminated.
+; CHECK: subq ${{24|72|80}}, %rsp