* src/prep_cif.c (ffi_prep_cif): Allow for X86_WIN32
also FFI_THISCALL.
* src/x86/ffi.c (ffi_closure_THISCALL): Add prototype.
(FFI_INIT_TRAMPOLINE_THISCALL): New trampoline code.
(ffi_prep_closure_loc): Add FFI_THISCALL support.
* src/x86/ffitarget.h (FFI_TRAMPOLINE_SIZE): Adjust size.
* src/x86/win32.S (ffi_closure_THISCALL): New closure code
for thiscall-calling convention.
* testsuite/libffi.call/closure_thiscall.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@184021 138bc75d-0d04-0410-961f-82ee72b054a4