bool Function::callsFunctionThatReturnsTwice() const {
for (const_inst_iterator
I = inst_begin(this), E = inst_end(this); I != E; ++I) {
- const CallInst* callInst = dyn_cast<CallInst>(&*I);
- if (!callInst)
- continue;
- if (callInst->canReturnTwice())
+ ImmutableCallSite CS(&*I);
+ if (CS && CS.hasFnAttr(Attribute::ReturnsTwice))
return true;
}