callgraph utility with opt

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1

Hello All,

I wanted to know how to use -callgraph option provided with opt. I have been using a -print-callgraph for generating a CG but I don’t want the o/p to go to a dot file. Is it required to build a pass using CallGraph.cpp or we can directly use the option with a .bc file.

Thanks
SHWETA

2

Hi Shweta,

I wanted to know how to use -callgraph option provided with opt. I have been
using a -print-callgraph for generating a CG but I don't want the o/p to go
to a dot file. Is it required to build a pass using CallGraph.cpp or we can
directly use the option with a .bc file.

if I do
  llvm-gcc -c -o - -emit-llvm cg.c | opt -print-callgraph -disable-output
then the output is printed on my console and does not go to a dot file.
If it is going to a dot file in your case then perhaps you made some
modifications to LLVM?

Ciao,

Duncan.