[Bug target/64003] valgrind complains about get_attr_length_nobnd in insn-attrtab.c from i386.md

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64003

--- Comment #9 from dmalcolm at gcc dot gnu.org ---
Created attachment 34166
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34166&action=edit
Dump of RTL from the reproducer