Add CMake infrastructure for smoke testing

Necessary CMake changes to implement pre-merge smoke tests
running via CI.

3 files changed, 202 insertions, 0 deletions

diff --git a/cmake/EigenSmokeTestList.cmake b/cmake/EigenSmokeTestList.cmake
new file mode 100644
index 000000000..6f0f72418
--- /dev/null
+++ b/cmake/EigenSmokeTestList.cmake
@@ -0,0 +1,131 @@
+# List of tests that will be build and run during Eigen's smoke testing. If one
+# of these tests doesn't exists or cannot be build with the current configuration
+# it will just be skipped.
+set(ei_smoke_test_list
+  adjoint_1
+  alignedvector3
+  array_cwise_7
+  array_cwise_8
+  array_for_matrix_1
+  array_of_string
+  array_replicate_1
+  array_reverse_1
+  autodiff_1
+  autodiff_scalar_1
+  bandmatrix
+  bdcsvd_9
+  bessel_functions_1
+  bfloat16_float
+  blasutil_1
+  block_5
+  BVH
+  cholesky_1
+  cholmod_support_23
+  cholmod_support_24
+  conservative_resize_1
+  constructor_1
+  corners_1
+  ctorleakmiscmatrices_4
+  dense_storage
+  determinant_1
+  diagonal_1
+  diagonal_2
+  diagonalmatrices_1
+  dynalloc
+  eigensolver_complex_1
+  eigensolver_selfadjoint_8
+  EulerAngles_1
+  exceptions
+  fastmath
+  first_aligned
+  geo_alignedbox_2
+  geo_eulerangles_1
+  geo_homogeneous_1
+  geo_hyperplane_1
+  geo_orthomethods_1
+  geo_parametrizedline_1
+  geo_transformations_7
+  half_float
+  hessenberg_1
+  hessenberg_6qr_10
+  householder_8
+  indexed_view_1
+  inplace_decomposition_1
+  integer_types_1
+  inverse_1
+  is_same_dense
+  jacobi_1
+  jacobisvd_1
+  kronecker_product
+  linearstructure_1
+  mapped_matrix_1
+  mapstaticmethods_1
+  mapstride_1
+  matrix_square_root_1
+  meta
+  minres_2
+  miscmatrices_1
+  mixingtypes_7
+  nestbyvalue
+  nesting_ops_1
+  nomalloc_1
+  nullary_1
+  num_dimensions
+  NumericalDiff
+  numext
+  packetmath
+  permutationmatrices_1
+  polynomialsolver_1
+  prec_inverse_4x4_1
+  product_extra_5
+  product_selfadjoint_1
+  product_small_7
+  product_symm_1
+  product_syrk_1
+  product_trmm_1
+  product_trmv_1
+  product_trsolve_5
+  qr_1
+  qr_colpivoting_7
+  qr_fullpivoting_4
+  rand
+  real_qz_1
+  redux_1
+  ref_1
+  resize
+  rvalue_types_1
+  schur_complex_1
+  schur_real_1
+  selfadjoint_1
+  sizeof
+  sizeoverflow
+  smallvectors
+  sparse_basic_3
+  sparse_block_1
+  sparse_extra_4
+  sparse_permutations_2
+  sparse_product_4
+  sparse_ref_1
+  sparse_solvers_1
+  sparse_vector_1
+  special_functions_1
+  special_numbers_1
+  special_packetmath_1
+  spqr_support_2
+  stable_norm_1
+  stddeque_1
+  stddeque_overload_1
+  stdlist_1
+  stdlist_overload_1
+  stdvector_1
+  stdvector_overload_1
+  stl_iterators_1
+  swap_1
+  symbolic_index_1
+  triangular_1
+  type_aliaslu_9
+  umeyama_3
+  unalignedassert
+  unalignedcount
+  vectorwiseop_1
+  visitor_1)
\ No newline at end of file
diff --git a/cmake/EigenTesting.cmake b/cmake/EigenTesting.cmake
index fae5bc1e4..5011340dc 100644
--- a/cmake/EigenTesting.cmake
+++ b/cmake/EigenTesting.cmake
@@ -18,6 +18,11 @@ macro(ei_add_test_internal testname testname_with_suffix)
     set(filename ${testname}.cpp)
   endif()
 
+  # Add the current target to the list of subtest targets
+  get_property(EIGEN_SUBTESTS_LIST GLOBAL PROPERTY EIGEN_SUBTESTS_LIST)
+  set(EIGEN_SUBTESTS_LIST "${EIGEN_SUBTESTS_LIST}${targetname}\n")
+  set_property(GLOBAL PROPERTY EIGEN_SUBTESTS_LIST "${EIGEN_SUBTESTS_LIST}")
+
   if(EIGEN_ADD_TEST_FILENAME_EXTENSION STREQUAL cu)
     if(EIGEN_TEST_HIP)
       hip_reset_flags()
@@ -413,11 +418,13 @@ macro(ei_init_testing)
   define_property(GLOBAL PROPERTY EIGEN_MISSING_BACKENDS BRIEF_DOCS " " FULL_DOCS " ")
   define_property(GLOBAL PROPERTY EIGEN_TESTING_SUMMARY BRIEF_DOCS " " FULL_DOCS " ")
   define_property(GLOBAL PROPERTY EIGEN_TESTS_LIST BRIEF_DOCS " " FULL_DOCS " ")
+  define_property(GLOBAL PROPERTY EIGEN_SUBTESTS_LIST BRIEF_DOCS " " FULL_DOCS " ")
 
   set_property(GLOBAL PROPERTY EIGEN_TESTED_BACKENDS "")
   set_property(GLOBAL PROPERTY EIGEN_MISSING_BACKENDS "")
   set_property(GLOBAL PROPERTY EIGEN_TESTING_SUMMARY "")
   set_property(GLOBAL PROPERTY EIGEN_TESTS_LIST "")
+  set_property(GLOBAL PROPERTY EIGEN_SUBTESTS_LIST "")
 
   define_property(GLOBAL PROPERTY EIGEN_FAILTEST_FAILURE_COUNT BRIEF_DOCS " " FULL_DOCS " ")
   define_property(GLOBAL PROPERTY EIGEN_FAILTEST_COUNT BRIEF_DOCS " " FULL_DOCS " ")
@@ -708,3 +715,63 @@ macro(ei_split_testsuite num_splits)
     add_dependencies("${current_target}" "${curr_test}")
   endforeach()
 endmacro(ei_split_testsuite num_splits)
+
+# Defines two custom commands buildsmoketests and smoketests that build and run
+# a number of tests specified in smoke_test_list.
+# 
+# Test in smoke_test_list can be either test targets (e.g. packetmath) or
+# subtests targets (e.g. packetmath_2). If any of the test are not available
+# in the current configuration they are just skipped. 
+#
+# Smoke tests are intended to be run before the whole test suite is invoked,
+# e.g., to smoke test patches.
+macro(ei_add_smoke_tests smoke_test_list)
+  # Set the build target to build smoketests
+  set(buildtarget "buildsmoketests")
+  add_custom_target("${buildtarget}")
+
+  # We build a regex that matches our smoketests only and will pass it to ctest
+  set(ctest_regex "")
+
+  # Get list of all tests and translate it into a CMake list
+  get_property(EIGEN_TESTS_LIST GLOBAL PROPERTY EIGEN_TESTS_LIST)
+  string(REGEX REPLACE "\n" " " EIGEN_TESTS_LIST "${EIGEN_TESTS_LIST}")
+  set(EIGEN_TESTS_LIST "${EIGEN_TESTS_LIST}")
+  separate_arguments(EIGEN_TESTS_LIST)
+
+  # Check if the test in smoke_test_list is a currently valid test target
+  foreach(test IN ITEMS ${smoke_test_list})
+    # Add tests in smoke_test_list to our smoke test target but only if the test
+    # is currently available, i.e., is in EIGEN_SUBTESTS_LIST
+    if ("${test}" IN_LIST EIGEN_TESTS_LIST)
+      add_dependencies("${buildtarget}" "${test}")
+      # In the case of a test we match all subtests
+      set(ctest_regex "${ctest_regex}^${test}_[0-9]+$$|")
+    endif()
+  endforeach()
+
+  # Get list of all subtests and translate it into a CMake list
+  get_property(EIGEN_SUBTESTS_LIST GLOBAL PROPERTY EIGEN_SUBTESTS_LIST)
+  string(REGEX REPLACE "\n" " " EIGEN_SUBTESTS_LIST "${EIGEN_SUBTESTS_LIST}")
+  set(EIGEN_SUBTESTS_LIST "${EIGEN_SUBTESTS_LIST}")
+  separate_arguments(EIGEN_SUBTESTS_LIST)
+
+  # Check if the test in smoke_test_list is a currently valid subtest target
+  foreach(test IN ITEMS ${smoke_test_list})
+    # Add tests in smoke_test_list to our smoke test target but only if the test
+    # is currently available, i.e., is in EIGEN_SUBTESTS_LIST
+    if ("${test}" IN_LIST EIGEN_SUBTESTS_LIST)
+      add_dependencies("${buildtarget}" "${test}")
+      # In the case of a subtest we match exactly
+      set(ctest_regex "${ctest_regex}^${test}$$|")
+    endif()
+  endforeach()
+
+  # Remove trailing '|' in ctest regex
+  string(REGEX REPLACE "\\|$" "" ctest_regex "${ctest_regex}")
+  message(STATUS "${ctest_regex}")
+  # Set the test target to run smoketests
+  set(testtarget "smoketests")
+  add_custom_target("${testtarget}" COMMAND ctest -R '${ctest_regex}' --random-shuffle)
+  add_dependencies("${testtarget}" "${buildtarget}")
+endmacro(ei_add_smoke_tests)
\ No newline at end of file
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index f6390e8b3..56664e783 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -460,3 +460,7 @@ cmake_dependent_option(EIGEN_TEST_BUILD_DOCUMENTATION "Test building the doxygen
 if(EIGEN_TEST_BUILD_DOCUMENTATION)
   add_dependencies(buildtests doc)
 endif()
+
+# Register all smoke tests
+include("EigenSmokeTestList")
+ei_add_smoke_tests("${ei_smoke_test_list}")