[Bug target/79793] Incorrect stack alignment for interrupt handler in 64-bit

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79793

--- Comment #17 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H.J. Lu from comment #16)
> The problem is in create_cie_data:
> 
>  /* On entry, the Canonical Frame Address is at SP.  */
>   memset (&loc, 0, sizeof (loc));
>   loc.reg = dw_stack_pointer_regnum;
>   loc.offset = INCOMING_FRAME_SP_OFFSET;
>   def_cfa_1 (&loc);
> 
> We lost the function type info with LTO.

We didn't lose the info. The problem is that create_pseudo_cfg assumes
INCOMING_FRAME_SP_OFFSET is a constant.