Course Project
For this project you will write a pass for the LLVM compiler.
-
Download the LLVM compiler source from llvm.org,
configure, compile and install it.
-
Study the documentation on llvm.org and familiarize yourselves
with the compiler, its phases, and APIs.
-
Study the Tutorial on writing an example LLVM pass.
-
Write an additional pass for LLVM to change the program. Your
pass should discover all direct calls to printf and add an
additional call to fprintf with the same arguments right after
each printf call, so that the program writes (in addition to
stdout) a file named log.txt containing everything printf-ed on
stdout. The file log.txt should be fopen-ed at the start of
main() and closed before main() ends.
Deliverables
For the project you have to deliver
-
A report of at most 3 pages, describing the process that you
took to rewrite the program.
-
The source code in a tarball, along with a README file
describing how to compile and run LLVM including your pass
(e.g., where to place your files in the LLVM source tree, what
to change in Makefiles if needed, configure flags).
Include one or two example input programs along with directions
of how to transform them using LLVM plus your pass.
Due Date
Email the above deliverables to the instructor by the last day of
the exams.