CompCert

The formally-verified C compiler.

Overview

The CompCert C verified compiler is a compiler for a large subset of the C programming language that generates code for the PowerPC, ARM, x86 and RISC-V processors.

The distinguishing feature of CompCert is that it has been formally verified using the Coq proof assistant: the generated assembly code is formally guaranteed to behave as prescribed by the semantics of the source C code.

For more information on CompCert (supported platforms, supported C features, installation instructions, using the compiler, etc), please refer to the Web site and especially the user's manual.

License

CompCert is not free software. This non-commercial release can only be used for evaluation, research, educational and personal purposes. A commercial version of CompCert, without this restriction and with professional support and extra features, can be purchased from AbsInt. See the file LICENSE for more information.

Copyright

The CompCert verified compiler is Copyright Institut National de Recherche en Informatique et en Automatique (INRIA) and AbsInt Angewandte Informatik GmbH.

Contact

General discussions on CompCert take place on the [email protected] mailing list.

For inquiries on the commercial version of CompCert, please contact [email protected]

BeePL

To run a BeePL program run CompCert with a file that ends in .b.

./ccomp ~/test.b

The contents of the file do not matter. The .b suffix tells the driver to call process_b_file which in turn calls compile_b_file. The program compiled is hard coded in compile_b_file and passed to transf_beepl_program_csyntax. The hard coded program in compile_b_file is defined in BeePL_progs.v.

To pretty print csyntax: ./ccomp ~/test.b -dc

Add a new test file

1. Add a Coq file to compiler_test/beepl_test
2. In Makefile add the file to the list of BEEPL_TESTS
3. In BeePL_progs.v Require Import the file
4. Define the BeePL AST in the newly created Coq file
5. Modify the required lines in BeePL_progs.v so the correct program gets extracted

Running the typechecker

Add -typecheck to your command line to run the typechecker.

Full example: ./ccomp ../test.b -o test -typecheck