[Bug target/64882] [5 Regression] ICE on valid code at -O3 with -g enabled in simplify_subreg, at simplify-rtx.c:5681

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64882

--- Comment #10 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #7)
> But what about vsib_address_operand, address_mpx_no_base_operand,
> address_mpx_no_index_operand?

 (define_predicate "vsib_address_operand"
-  (match_operand 0 "address_operand")
+  (match_test "address_operand (op, VOIDmode)")

> Even address_operand is used directly:
>   [(prefetch (match_operand:P 0 "address_operand" "p")
>              (const_int 1)
>              (const_int 2))]

Ah, I see. Luckily, the mode is ignored in ix86_legitimate_address_p, so this
is more "cosmetic" issue.

I'm testing attached patch that solves all these issues and hopefully solves a
bunch of (harmless) thinkos.