//Remove given USE from occurence set.
void MDSSAInfo::removeUse(IR const* exp, IN UseDefMgr * usedefmgr)
{
ASSERT0(exp && exp->is_exp() && usedefmgr);
SEGIter * iter = NULL;
for (INT i = getVOpndSet()->get_first(&iter);
i >= 0; i = getVOpndSet()->get_next(i, &iter)) {
VMD * vopnd = (VMD*)usedefmgr->getVOpnd(i);
ASSERT0(vopnd && vopnd->is_md());
vopnd->getOccSet()->diff(exp->id());
}
}
//
//START MDSSAInfo
//
//Return true if all definition of vopnd can reach 'exp'.
bool MDSSAInfo::isUseReachable(IN UseDefMgr * usedefmgr, IR const* exp)
{
ASSERT0(usedefmgr && exp && exp->is_exp());
SEGIter * iter = NULL;
for (INT i = getVOpndSet()->get_first(&iter);
i >= 0; i = getVOpndSet()->get_next(i, &iter)) {
VMD * vopnd = (VMD*)usedefmgr->getVOpnd(i);
ASSERT0(vopnd && vopnd->is_md());
if (!vopnd->getOccSet()->is_contain(exp->id())) {
return false;
}
}
return true;
}
//Facility function to make it easier to get the VOpnd of operand of PHI.
VMD * MDPhi::getOpndVMD(IR const* opnd, UseDefMgr const* mgr) const
{
ASSERT(xcom::in_list(getOpndList(), opnd), ("not operand of phi"));
if (!opnd->is_id() && opnd->isMemoryOpnd()) { return NULL; }
ASSERT0(mgr && mgr->getMDSSAInfo(opnd) &&
mgr->getMDSSAInfo(opnd)->getVOpndSet()->get_elem_count() == 1);
SEGIter * iter;
VMD * vopnd = (VMD*)mgr->getVOpnd(mgr->getMDSSAInfo(opnd)->
getVOpndSet()->get_first(&iter));
ASSERT0(vopnd->is_md());
return vopnd;
}
//Collect all USE, where USE is IR expression.
void MDSSAInfo::collectUse(
OUT DefSBitSetCore & set,
IN UseDefMgr * usedefmgr,
IN DefMiscBitSetMgr * bsmgr)
{
ASSERT0(usedefmgr && bsmgr);
SEGIter * iter = NULL;
Region * rg = usedefmgr->getRegion();
for (INT i = getVOpndSet()->get_first(&iter);
i >= 0; i = getVOpndSet()->get_next(i, &iter)) {
VMD * vopnd = (VMD*)usedefmgr->getVOpnd(i);
ASSERT0(vopnd && vopnd->is_md());
SEGIter * vit = NULL;
for (INT i2 = vopnd->getOccSet()->get_first(&vit);
i2 >= 0; i2 = vopnd->getOccSet()->get_next(i2, &vit)) {
IR * use = rg->getIR(i2);
ASSERT0(use && (use->isMemoryRef() || use->is_id()));
set.bunion(use->id(), *bsmgr);
}
}
}