https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112285
--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Iain Buclaw <ibuc...@gcc.gnu.org>: https://gcc.gnu.org/g:ec3a01024dd86c51d1e563df9395123765cf548d commit r12-10202-gec3a01024dd86c51d1e563df9395123765cf548d Author: Iain Buclaw <ibuc...@gdcproject.org> Date: Sun Mar 10 17:49:06 2024 +0100 d: Fix -fpreview=in ICEs with forward referenced parameter [PR112285] The way that the target hook preferPassByRef is implemented, it relied on the GCC "back-end" tree type to determine whether or not to use `ref' ABI for D `in' parameters; e.g: prefer by value if it is expected that the target will pass the type around in registers. Building the GCC tree type depends on the AST type being complete - all semantic processing is finished - but as this hook is called from the front-end, this will not be the case for forward referenced or self-referencing types. The consensus in upstream is that `in' parameters should always be implicitly `ref', but as the front-end does not yet support all types being rvalue references, limit this just static arrays and structs. PR d/112285 PR d/112290 gcc/d/ChangeLog: * d-target.cc (Target::preferPassByRef): Return true for all static array and struct types. gcc/testsuite/ChangeLog: * gdc.dg/pr112285.d: New test. * gdc.dg/pr112290.d: New test. * gdc.test/compilable/previewin.d: Adjust testcase. (cherry picked from commit 025ff57c19efae6c8d76df6b93e7d9827017acc9)
