[Bug rtl-optimization/32755] Seg fault when compile CPU2000 with -fsee

[Joey dot ye at intel dot com]

------- Comment #2 from Joey dot ye at intel dot com  2007-07-13 09:27 -------
Root cause looks like at see.c line 1643:
      emit_insn_after (merged_ref, ref);
      delete_insn (ref);
where merged_ref and ref have the same INSN_UID. delete_insn will clear the df
information of that UID, resulted as no df information for merged_ref.

I tried inserting following line and it works:
+     INSN_UID(merged_ref)=cfun->emit->x_cur_insn_uid++;

But it is apparantly ugly. Anyone can share the right approach to replace 
a insn with another one who has the same UID?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32755