[Bug target/111107] i686-w64-mingw32 does not realign stack when __attribute__((aligned)) or __attribute__((vector_size)) are used

[lh_mouse at 126 dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111107

LIU Hao <lh_mouse at 126 dot com> changed:

           What    |Removed                     |Added
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  Attachment #61251|0                           |1
        is obsolete|                            |

--- Comment #36 from LIU Hao <lh_mouse at 126 dot com> ---
Created attachment 61261
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61261&action=edit
final patch

1. Decrease preferred stack alignment from 16 bytes to 4 bytes. The default
   incoming stack alignment is initialized to this value, so it's also
decreased.
2. Make `force_align_arg_pointer` attribute increase preferred alignment to at
   least 16 bytes, to maintain backward compatibility.