return LV; // Common case, already in the map.
if (Constant *C = dyn_cast<Constant>(V)) {
- if (isa<UndefValue>(C))
- ; // Undef values remain undefined.
- else if (ConstantStruct *CS = dyn_cast<ConstantStruct>(C))
- LV.markConstant(CS->getOperand(i)); // Constants are constant.
- else if (isa<ConstantAggregateZero>(C)) {
- Type *FieldTy = cast<StructType>(V->getType())->getElementType(i);
- LV.markConstant(Constant::getNullValue(FieldTy));
- } else
+ Constant *Elt = C->getAggregateElement(i);
+
+ if (Elt == 0)
LV.markOverdefined(); // Unknown sort of constant.
+ else if (isa<UndefValue>(Elt))
+ ; // Undef values remain undefined.
+ else
+ LV.markConstant(Elt); // Constants are constant.
}
// All others are underdefined by default.
}
if (SwitchInst *SI = dyn_cast<SwitchInst>(&TI)) {
- if (TI.getNumSuccessors() < 2) {
+ if (!SI->getNumCases()) {
Succs[0] = true;
return;
}
return;
}
- Succs[SI->findCaseValue(CI)] = true;
+ Succs[SI->findCaseValue(CI).getSuccessorIndex()] = true;
return;
}
return true;
if (SwitchInst *SI = dyn_cast<SwitchInst>(TI)) {
- if (SI->getNumSuccessors() < 2)
+ if (SI->getNumCases() < 1)
return true;
LatticeVal SCValue = getValueState(SI->getCondition());
if (CI == 0)
return !SCValue.isUndefined();
- // Make sure to skip the "default value" which isn't a value
- for (unsigned i = 1, E = SI->getNumSuccessors(); i != E; ++i)
- if (SI->getSuccessorValue(i) == CI) // Found the taken branch.
- return SI->getSuccessor(i) == To;
-
- // If the constant value is not equal to any of the branches, we must
- // execute default branch.
- return SI->getDefaultDest() == To;
+ return SI->findCaseValue(CI).getCaseSuccessor() == To;
}
// Just mark all destinations executable!
}
if (SwitchInst *SI = dyn_cast<SwitchInst>(TI)) {
- if (SI->getNumSuccessors() < 2) // no cases
+ if (!SI->getNumCases())
continue;
if (!getValueState(SI->getCondition()).isUndefined())
continue;
// If the input to SCCP is actually switch on undef, fix the undef to
// the first constant.
if (isa<UndefValue>(SI->getCondition())) {
- SI->setCondition(SI->getCaseValue(1));
- markEdgeExecutable(BB, TI->getSuccessor(1));
+ SI->setCondition(SI->case_begin().getCaseValue());
+ markEdgeExecutable(BB, SI->case_begin().getCaseSuccessor());
return true;
}
- markForcedConstant(SI->getCondition(), SI->getCaseValue(1));
+ markForcedConstant(SI->getCondition(), SI->case_begin().getCaseValue());
return true;
}
}
ReturnsToZap[i]->setOperand(0, UndefValue::get(F->getReturnType()));
}
- // If we inferred constant or undef values for globals variables, we can delete
- // the global and any stores that remain to it.
+ // If we inferred constant or undef values for globals variables, we can
+ // delete the global and any stores that remain to it.
const DenseMap<GlobalVariable*, LatticeVal> &TG = Solver.getTrackedGlobals();
for (DenseMap<GlobalVariable*, LatticeVal>::const_iterator I = TG.begin(),
E = TG.end(); I != E; ++I) {