[Bug target/126434] [17 Regression] ICE: invalid rtl sharing found in the insn {zero_extendsidi2}

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126434

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2026-07-28
                 CC|                            |jakub at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- gcc/avoid-store-forwarding.cc.jj    2026-06-05 20:39:09.411516351 +0200
+++ gcc/avoid-store-forwarding.cc       2026-07-28 11:50:15.835271670 +0200
@@ -444,7 +444,7 @@ process_store_forwarding (vec<store_fwd_
       else
        move_src = dest;

-      rtx move = gen_rtx_SET (SET_DEST (load), move_src);
+      rtx move = gen_rtx_SET (copy_rtx (SET_DEST (load)), move_src);

       start_sequence ();
       rtx_insn *insn = emit_insn (move);

fixes this exact case, but wonder how many other RTX sharing bugs are in the
pass.
E.g. dest = SET_DEST (load); and tons of uses of dest in various new insns,
etc.