http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56807
--- Comment #1 from Andrew Church <achurch+gcc at achurch dot org> 2013-04-02 07:47:41 UTC --- Created attachment 29773 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29773 testcase-1.c This file contains the bulk of the testcase. The function foo() has to be defined in a separate file to trigger the bug. Compile with: mingw32-gcc -mincoming-stack-boundary=2 -mpreferred-stack-boundary=4 testcase-1.c testcase-2.c -o testcase.exe