in opt_ssa.cxx (starting line 1595):
1589 //
=======================================================================
1590 // Resurrect_chi - A chi node that was dead has to be resurrected
1591 // because ILOAD to LDID folding introduces a real use of the result
of the
1592 // chi; need to call recursively for the chi operand to revive it.
1593 //
=======================================================================
1594 void
1595 SSA::Resurrect_chi(CHI_NODE *chi)
1596 {
1597 VER_ID du;
1598 CODEREP *cr;
1599
1600 du = chi->Result();
1601 STMTREP *sr = Find_stmt_containing_chi(chi,
_opt_stab->Ver_stab_entry(du)->Bb());
1602 if (_opt_stab->Du_zero_vers(du) ) {
1603 cr = Get_zero_version_CR(chi->Aux_id(), _opt_stab, du);
1604 sr->Set_has_zver();
1605 } else {
1606 cr = Du2cr(_htable, _opt_stab, du, sr);
1607 cr->Set_flag(CF_DEF_BY_CHI);
1608 cr->Set_defchi(chi);
1609 }
1610 chi->Set_RESULT(cr);
1611 chi->Set_live(TRUE);
1612 chi->Set_dse_dead(FALSE);
1613
1614 if (sr->Op() == OPC_OPT_CHI)
1615 chi->Set_OPND( Get_zero_version_CR(chi->Aux_id(), _opt_stab,
du));
1616 else {
1617 chi->Set_OPND(Revive_phi_chi_opnd(chi->Opnd()));
1618 chi->OPND()->Set_flag(CF_DONT_PROP);
1619 }
1620 }
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