[Bug target/121584] -ftrivial-auto-var-init=pattern is incompatible with opaque sizeless types (SVE) in ARM C Language Extensions (ACLE)

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121584

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot 
gnu.org
             Status|NEW                         |ASSIGNED

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> I might take a look this afternoon .

This works:
```
diff --git a/gcc/gimple-fold.cc b/gcc/gimple-fold.cc
index 35c457406dc..3913e3255b3 100644
--- a/gcc/gimple-fold.cc
+++ b/gcc/gimple-fold.cc
@@ -4706,6 +4706,9 @@ clear_padding_bitint_needs_padding_p (tree type)
 bool
 clear_padding_type_may_have_padding_p (tree type)
 {
+  /* Assume poly sized types don't need padding.  */
+  if (POLY_INT_CST_P (TYPE_SIZE_UNIT (type)))
+    return false;
   switch (TREE_CODE (type))
     {
     case RECORD_TYPE:

```

I will do some more testing and submit a patch.