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[v7,0/3] c: Add __lengthof__ operator

Message ID cover.1723323176.git.alx@kernel.org
Headers show
Series c: Add __lengthof__ operator | expand

Message

Alejandro Colomar Aug. 10, 2024, 8:54 p.m. UTC 
Hi!

v7:

-  Tests:
   -  Fix 2 tests (whitespace fix).
   -  Fix typo in comment.


Alejandro Colomar (3):
  gcc/: Rename array_type_nelts() => array_type_nelts_minus_one()
  Merge definitions of array_type_nelts_top()
  c: Add __lengthof__ operator

 gcc/c-family/c-common.cc                |  26 ++++
 gcc/c-family/c-common.def               |   3 +
 gcc/c-family/c-common.h                 |   2 +
 gcc/c/c-decl.cc                         |  30 +++--
 gcc/c/c-fold.cc                         |   7 +-
 gcc/c/c-parser.cc                       |  61 +++++++---
 gcc/c/c-tree.h                          |   4 +
 gcc/c/c-typeck.cc                       | 118 ++++++++++++++++++-
 gcc/config/aarch64/aarch64.cc           |   2 +-
 gcc/config/i386/i386.cc                 |   2 +-
 gcc/cp/cp-tree.h                        |   1 -
 gcc/cp/decl.cc                          |   2 +-
 gcc/cp/init.cc                          |   8 +-
 gcc/cp/lambda.cc                        |   3 +-
 gcc/cp/operators.def                    |   1 +
 gcc/cp/tree.cc                          |  13 --
 gcc/doc/extend.texi                     |  31 +++++
 gcc/expr.cc                             |   8 +-
 gcc/fortran/trans-array.cc              |   2 +-
 gcc/fortran/trans-openmp.cc             |   4 +-
 gcc/rust/backend/rust-tree.cc           |  13 --
 gcc/rust/backend/rust-tree.h            |   2 -
 gcc/target.h                            |   3 +
 gcc/testsuite/gcc.dg/lengthof-compile.c | 115 ++++++++++++++++++
 gcc/testsuite/gcc.dg/lengthof-vla.c     |  46 ++++++++
 gcc/testsuite/gcc.dg/lengthof.c         | 150 ++++++++++++++++++++++++
 gcc/tree.cc                             |  17 ++-
 gcc/tree.h                              |   3 +-
 28 files changed, 598 insertions(+), 79 deletions(-)
 create mode 100644 gcc/testsuite/gcc.dg/lengthof-compile.c
 create mode 100644 gcc/testsuite/gcc.dg/lengthof-vla.c
 create mode 100644 gcc/testsuite/gcc.dg/lengthof.c

Range-diff against v6:
1:  8b68e250503 = 1:  8b68e250503 gcc/: Rename array_type_nelts() => array_type_nelts_minus_one()
2:  21433097103 = 2:  21433097103 Merge definitions of array_type_nelts_top()
3:  71fd2013967 ! 3:  4bd3837d09c c: Add __lengthof__ operator
    @@ gcc/testsuite/gcc.dg/lengthof-compile.c (new)
     +  int n = 7;
     +
     +  _Static_assert (__lengthof__ (int [3][n]) == 3);
    -+  _Static_assert (__lengthof__ (int [n][3]) == 7); /* { dg-error "not constant"} */
    ++  _Static_assert (__lengthof__ (int [n][3]) == 7); /* { dg-error "not constant" } */
     +  _Static_assert (__lengthof__ (int [0][3]) == 0);
     +  _Static_assert (__lengthof__ (int [0]) == 0);
     +
    -+  /* FIXME: lengthog(int [0][n]) should result in a constant expression.  */
    -+  _Static_assert (__lengthof__ (int [0][n]) == 0); /* { dg-error "not constant"} */
    ++  /* FIXME: lengthof(int [0][n]) should result in a constant expression.  */
    ++  _Static_assert (__lengthof__ (int [0][n]) == 0); /* { dg-error "not constant" } */
     +}
     
      ## gcc/testsuite/gcc.dg/lengthof-vla.c (new) ##