static void ComputeNumbering(Function *F, DenseMap<Value*,unsigned> &Numbering){
unsigned IN = 0;
// Arguments get the first numbers.
for (Function::arg_iterator
AI = F->arg_begin(), AE = F->arg_end(); AI != AE; ++AI)
if (!AI->hasName())
Numbering[&*AI] = IN++;
// Walk the basic blocks in order.
for (Function::iterator FI = F->begin(), FE = F->end(); FI != FE; ++FI) {
if (!FI->hasName())
Numbering[&*FI] = IN++;
// Walk the instructions in order.
for (BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE; ++BI)
// void instructions don't get numbers.
if (!BI->hasName() && !BI->getType()->isVoidTy())
Numbering[&*BI] = IN++;
}
assert(!Numbering.empty() && "asked for numbering but numbering was no-op");
}
