[all-commits] [llvm/llvm-project] fe2406: [libc++][modules] Adds module testing.

[Mark de Wever via All-commits]

  Branch: refs/heads/users/mordante/adds_module_testing
  Home:   https://github.com/llvm/llvm-project
  Commit: fe2406d5fb6c01db9efadc9107c94585a6051c8a
      https://github.com/llvm/llvm-project/commit/fe2406d5fb6c01db9efadc9107c94585a6051c8a
  Author: Mark de Wever <koraq at xs4all.nl>
  Date:   2023-12-23 (Sat, 23 Dec 2023)

  Changed paths:
    M libcxx/test/libcxx/module_std.gen.py
    M libcxx/test/libcxx/module_std_compat.gen.py
    A libcxx/test/libcxx/selftest/modules/no-modules.sh.cpp
    A libcxx/test/libcxx/selftest/modules/std-and-std.compat-module.sh.cpp
    A libcxx/test/libcxx/selftest/modules/std-module.sh.cpp
    A libcxx/test/libcxx/selftest/modules/std.compat-module.sh.cpp
    A libcxx/test/libcxx/selftest/modules/unknown-module.compile.pass.cpp
    M libcxx/test/std/modules/std.compat.pass.cpp
    M libcxx/test/std/modules/std.pass.cpp
    M libcxx/utils/libcxx/test/features.py
    M libcxx/utils/libcxx/test/format.py
    M libcxx/utils/libcxx/test/modules.py

  Log Message:
  -----------
  [libc++][modules] Adds module testing.

This adds a new module test infrastructure. This requires tagging tests
using modules. The test runner uses this information to determine the
compiler flags needed to build and use the module.

Currently modules are build per test, which allows testing them for
tests with ADDITIONAL_COMPILE_FLAGS. At the moment only 4 tests use
modules. Therefore the performance penalty is not measurable. If in the
future more tests use modules it would be good to measure the overhead
and determine whether it's acceptable.