On 6/30/25 7:03 PM, H.J. Lu wrote:
On Mon, Jun 30, 2025 at 10:36 PM Jason Merrill <ja...@redhat.com> wrote:
On 6/28/25 7:00 AM, H.J. Lu wrote:
Since a backend may ignore user type alignment for arguments passed on
stack, check backend for argument alignment on stack when evaluating
__alignof.
I assume that's reflected in DECL_ALIGN, so could we just add PARM_DECL to
No. targetm.calls.function_arg_boundary may have special handling for it.
Why wouldn't we adjust DECL_ALIGN of the PARM_DECL to reflect the actual
alignment of the argument? Are you saying it could be different from
one call to another?
else if (VAR_OR_FUNCTION_DECL_P (expr))
t = size_int (DECL_ALIGN_UNIT (expr));
?
Jason
