[Bug c++/58372] internal compiler error: ix86_compute_frame_layout

[xuepeng.guo at intel dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #22 from xuepeng guo <xuepeng.guo at intel dot com> ---
(In reply to Uroš Bizjak from comment #20)
> Created attachment 44928 [details]
> Proposed patch
> 
> It turned out that functions, called directly through emit_library_call (as
> the above testcase, which builds call to _Unwind_SjLj_Register from
> sjlj_emit_function_enter) miss a whole lot of stack realignmnet setup. There
> is an update to crtl->preferred_stack_boundary, but several updates for
> SUPPORTS_STACK_ALIGNMENT targets are missing, including eventual DRAP setup.
> 
> Attached patch fixes the path through emit_library_call.
> 
> Can someone please test the patch on SJLJ target?

On an x86_64 Linux platform, I simply configured gcc with command:
../gcc/configure --enable-sjlj-exceptions

Then with Uroš's patch, the gcc bootstrap has no problem and the case can be
successfully compiled. I am doing the gcc regression test to make sure there is
no regression with Uroš's patch, it will take some time to finish. I am also
attempting to cross-build for i686-w64-mingw32 to verify for Comment #14.

If I am missing something, please let me know. Thanks very much.