The LLVM IR control flow graph can be visualized using the GraphViz tool. It gives a visual depiction of the nodes formed and how the code flow follows in the IR generated. Since the important data structures in LLVM are graphs, this can be a very useful way to understand the IR flow when writing a custom pass or studying the behavior of the IR pattern.
To install
graphviz
on Ubuntu, first add itsppa
repository:$ sudo apt-add-repository ppa:dperry/ppa-graphviz-test
Update the package repository:
$ sudo apt-get update
Install
graphviz
:$ sudo apt-get install graphviz