[Bug d/96435] d: Returning boolean in a union violates @safe code

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96435

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Iain Buclaw
<ibuc...@gcc.gnu.org>:

https://gcc.gnu.org/g:10490b7a453159f9b602b7f273f0aa6b4caebca7

commit r10-10012-g10490b7a453159f9b602b7f273f0aa6b4caebca7
Author: Iain Buclaw <ibuc...@gdcproject.org>
Date:   Mon Jul 26 19:28:02 2021 +0200

    d: Ensure casting from bool results in either 0 or 1 (PR96435)

    If casting from bool, the result is either 0 or 1, any other value
    violates @safe code, so enforce that it is never invalid.

            PR d/96435

    gcc/d/ChangeLog:

            * d-convert.cc (convert_for_rvalue): New function.
            * d-tree.h (convert_for_rvalue): Declare.
            * expr.cc (ExprVisitor::visit (CastExp *)): Use convert_for_rvalue.
            (build_return_dtor): Likewise.

    gcc/testsuite/ChangeLog:

            * gdc.dg/pr96435.d: New test.

    (cherry picked from commit 5c9b7408dc578cb2ae142a5c1b724c183497bdb2)