• SummerOfCode

Google's Summer Of Code

Thanks for your interest in the GNU Compiler Collection as your mentoring organization in Google's Summer of Code.

Summer of Code 2008 Accepted GCC Projects

Application and Project Ideas

The Drupal project has a great page on How to write an SOC application. A gcc Summer of Code participant for 2006, Laurynas Biveinis, wrote a blog about it.

There are several pages with general ideas for GCC. These ideas are not just one project but many different projects linked here for easy of access.

New optimization passes:

• Implement code motion of stores towards entry (and use this to improve code for int to float conversion on rs6000-based targets)
• Implement a prototype for early instruction selection
• Implement simple loop distribution to create perfect loop nests for GCC loop interchange to apply to SPEC CPU2000 swim
• Propagate interprocedural dataflow from GIMPLE to RTL
• Propagate alias information from GIMPLE to RTL
• Improve support for the restrict qualifier

• Rewrite tree-ssa-dse.c

• Add Factored Use-Def (FUD) chains to RTL

• Rewrite {{{tree-sra.c}}}

Language front-ends and run-time libraries:

• C++0x Support in GCC and libstdc++

• gcj, libgcj, and GNU Classpath ideas

• libstdc++ todo

• libstdc++ ideas

• Refactor libstdc++ for optional smaller footprint configuration, e.g., iostreams without templates

• Fortran front end: Unimplemented Fortran 2003 (and Fortran 2008) features

• OpenMP 3.0 support and other runtime improvements: openmp

Other projects:

• Fix -ftrapv so that it works.

• GCC projects page

• Ideas for speeding up GCC

• Improvements to GCC on Windows

• Partial_Transitions

• Separate the frontends from the middle-end (near bottom of page)

• Make -O2 (and other -On options) be a sum of individual -f* options, by adding a -fother-O2-optimizations (and same for other -On levels)
• When running the testsuite, run multiple tests in parallel
• Separate frontend folder from middle-end folder
• Emit debug information about types and declarations early (needed for LTO)
• Change the way thunks are emitted to be compatible with LTO

If you are interested in learning your way around the GCC codebase, the Partial_Transitions is a good place to start.

Other project ideas can be found in the bug database. Look for old bugs which are still open.

Or invent your own project. We're always open to good ideas. But note that we are probably not too interested in projects to add new extensions to the C or C++ languages. We've found over time that these tend to introduce more problems than they solve.

Thanks, and we look forward to your submissions!

Summer of Code 2007 Accepted GCC Projects

Summer of Code 2006 Accepted GCC Projects