[Bug target/107304] internal compiler error: in convert_move, at expr.cc:220 with -march=tigerlake

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107304

--- Comment #19 from H.J. Lu <hjl.tools at gmail dot com> ---
This seems to work:

diff --git a/gcc/expr.cc b/gcc/expr.cc
index 4c892d69249..b55736945c9 100644
--- a/gcc/expr.cc
+++ b/gcc/expr.cc
@@ -7902,6 +7902,11 @@ get_inner_reference (tree exp, poly_int64_pod *pbitsize,
         && VECTOR_TYPE_P (TREE_TYPE (field))
         && VECTOR_MODE_P (TYPE_MODE_RAW (TREE_TYPE (field))))
       mode = TYPE_MODE (TREE_TYPE (field));
+    /* Target attribute can change a vector mode to unsupported
+       on per-function basis.  */
+    else if (VECTOR_MODE_P (mode)
+        && vector_type_mode (TREE_TYPE (field)) == BLKmode)
+      mode = BLKmode;
   }
       else if (DECL_MODE (field) == BLKmode)
   blkmode_bitfield = true;