[Bug jit/95306] Getting __builtin_sadd_overflow gives the error "unimplemented primitive type for builtin: 42"

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95306

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by David Malcolm <dmalcolm@gcc.gnu.org>:

https://gcc.gnu.org/g:bf40f0ba95037f235b007a55a7682646a0578b26

commit r11-647-gbf40f0ba95037f235b007a55a7682646a0578b26
Author: David Malcolm <dmalcolm@redhat.com>
Date:   Tue May 26 09:28:16 2020 -0400

    jit: fix missing types for builtins [PR 95306]

    PR jit/95306 reports that attempts to use builtins
    __builtin_sadd_overflow" and "__builtin_memcpy" via
    gcc_jit_context_get_builtin_function lead to inscrutable error
    messages of the form:
      unimplemented primitive type for builtin: 42
    and:
      unimplemented primitive type for builtin: 38

    The root cause is that jit-builtins.c only implements a subset
    of the types defined via DEF_PRIMITIVE_TYPE in builtin-types.def.

    This patch:
    - implements enough types to enable the above two builtins to be
      referenced
    - documents gcc_jit_context_get_builtin_function, and notes the
      limitation that not all types are supported (supporting
      some of them would take a lot of extra work)
    - improves the error message for the unsupported cases
    - adds a testcase for __builtin_memcpy.  This required
      jit_langhook_global_bindings_p to be implemented (otherwise
      the assertion there failed deep inside "expand" on the builtin)
    - adds test coverage for the above

    gcc/jit/ChangeLog:
            PR jit/95306
            * docs/topics/functions.rst
            (gcc_jit_context_get_builtin_function): Document.
            * docs/_build/texinfo/libgccjit.texi: Regenerate.
            * dummy-frontend.c (jit_langhook_global_bindings_p): Remove
            gcc_unreachable.
            * jit-builtins.c (type_names): New array.
            (get_string_for_type_id): New function.
            (gcc::jit::builtins_manager::make_primitive_type): Show name of
            type in error messages.  Update cases to reflect the order in
            builtin-types.def.  Implement cases for BT_INT8, BT_INT16,
            BT_UINT8, BT_CONST_PTR, BT_VOLATILE_PTR, BT_INT_PTR, BT_FLOAT_PTR,
            BT_CONST_DOUBLE_PTR, BT_SIZE, BT_CONST_SIZE.

    gcc/testsuite/ChangeLog:
            PR jit/95306
            * jit.dg/all-non-failing-tests.h: Add test-builtin-memcpy.c and
            test-pr95306-builtin-types.c.
            * jit.dg/test-builtin-memcpy.c: New test.
            *
jit.dg/test-error-gcc_jit_context_get_builtin_function-unimplemented-type.c:
            New test.
            * jit.dg/test-pr95306-builtin-types.c: New test.