[Bug rtl-optimization/60155] ICE: in get_pressure_class_and_nregs at gcse.c:3438

[law at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60155

--- Comment #8 from Jeffrey A. Law <law at redhat dot com> ---
Rather than special case TRAP_IF, I think we just need to walk through the
pattern.  If we find no assignments or > 1 assignment, then we assert.

note_stores, or walking similar to hash_scan_insn where we keep track of
whether or not we've seen a set should be sufficient, I'd think.