PR rtl-optimization/29329
* combine.c (replaced_rhs_insn): Rename to i2mod.
(replaced_rhs_value): Rename to i2mod_new_rhs.
(i2mod_old_rhs): New global variable.
(combine_instructions): Adjust for above change. Save a copy of
the old RHS into i2mod_old_rhs when the contents of a REG_EQUAL
note are substituted in the second instruction.
(distribute_notes) <REG_DEAD>: Adjust for above change. Do not
ditch the note if it pertains to the second eliminated register
and this register is mentioned in i2mod_old_rhs.
Revert:
2006-09-12 Eric Botcazou <ebotcazou@libertysurf.fr>
* combine.c (distribute_notes) <REG_DEAD>: Do not consider SETs past
the insn to which the note was originally attached.
From-SVN: r121037
