PeepHoleOpt::Changed PeepHoleOpt::handleInst_Call(Inst* inst)
{
assert(inst->getMnemonic() == Mnemonic_CALL);
CallInst* callInst = (CallInst*)inst;
unsigned targetOpndIndex = callInst->getTargetOpndIndex();
Opnd* targetOpnd = callInst->getOpnd(targetOpndIndex);
Opnd::RuntimeInfo* ri = targetOpnd->getRuntimeInfo();
Opnd::RuntimeInfo::Kind rt_kind = Opnd::RuntimeInfo::Kind_Null;
if (ri != NULL) {
rt_kind = ri->getKind();
}
if (Opnd::RuntimeInfo::Kind_InternalHelperAddress == rt_kind) {
return handleInst_InternalHelperCall(inst, ri);
}
return Changed_Nothing;
}
const void* OpndUtils::extractAddrOfConst(const Opnd* op)
{
if (op->getMemOpndKind() != MemOpndKind_ConstantArea) {
return NULL;
}
// Actually, it's currently only works for IA-32 - I expect
// the address of constant completely in the displacement.
// On Intel64, the address already get loaded into a register,
// so more complicated analysis needed to find the proper constant
Opnd* disp = op->getMemOpndSubOpnd(MemOpndSubOpndKind_Displacement);
if (disp == NULL) {
// Perhaps, it's IA-32?
return NULL;
}
Opnd::RuntimeInfo* rtInfo = disp->getRuntimeInfo();
assert(rtInfo != NULL);
assert(rtInfo->getKind() == Opnd::RuntimeInfo::Kind_ConstantAreaItem);
ConstantAreaItem* item = (ConstantAreaItem*)rtInfo->getValue(0);
// At this point we must have the address...
assert(item->getValue()!= NULL);
return item->getValue();
}
//All CALL insts except some special helpers that never cause stacktrace printing
bool InstUtils::instMustHaveBCMapping(Inst* inst) {
if (!inst->hasKind(Inst::Kind_CallInst)) {
return false;
}
CallInst* callInst = (CallInst*)inst;
Opnd * targetOpnd=callInst->getOpnd(callInst->getTargetOpndIndex());
Opnd* immOpnd = OpndUtils::findImmediateSource(targetOpnd);
Opnd::RuntimeInfo * ri = immOpnd ? immOpnd->getRuntimeInfo() : NULL;
if(!ri) {
return true;
} else if (ri->getKind() == Opnd::RuntimeInfo::Kind_InternalHelperAddress) {
return false;
} else if (ri->getKind() == Opnd::RuntimeInfo::Kind_HelperAddress) {
VM_RT_SUPPORT helperId = (VM_RT_SUPPORT)(POINTER_SIZE_INT)ri->getValue(0);
switch (helperId) {
case VM_RT_GC_GET_TLS_BASE:
case VM_RT_GC_SAFE_POINT:
return false;
default:
break;
}
}
return true;
}