http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57159
--- Comment #5 from jules at gcc dot gnu.org 2013-05-03 20:05:19 UTC --- Actually the last paragraph might not make sense -- insn 16/17's *operands* are not available at the end of the BB, but only if the REG_EQUAL note contents are substituted for the insn pattern. But that's kind of what happens in hash_scan_set, so I think the overall idea's right.
