[LLVMdev] getCanonicalInductionVariable

[Malveeka Tewari]

Hi

I have the followed code for which I am writing a loop pass.

int main() {
  int i = 0;
  for (i=0; i<20; i++) {
    printf ("hello world %d\n", i);
  }
  return 0;
}

In the function runOnLoop, I have the following instruction
PHINode *indv = NULL;
indv = L->getCanonicalInductionVariable();

However, when I check indv is always set to NULL.
Since the code has a canonical induction variable, I was expecting the endv
to start pointing to the induction var phi node.

Please let me what I'm missing here

Thanks
Malveeka
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