Fix PR13899

- Update maximal stack alignment when stack arguments are prepared before a
  call.
- Test cases are enhanced to show it's not a Win32 specific issue but a generic
  one.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164946 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed