llvmPackages_16.llvm: avoid calling roundevenf on darwin

    # and thus fails under the sandbox:

    substituteInPlace unittests/TargetParser/Host.cpp \

      --replace '/usr/bin/sw_vers' "${(builtins.toString darwin.DarwinTools) + "/bin/sw_vers" }"

  '' + optionalString (stdenv.isDarwin && stdenv.hostPlatform.isx86) ''

    # This test tries to call the intrinsics `@llvm.roundeven.f32` and

    # `@llvm.roundeven.f64` which seem to (incorrectly?) lower to `roundevenf`

    # and `roundeven` on x86_64 macOS.

    # and `roundeven` on macOS.

    #

    # However these functions are glibc specific so the test fails:

    #   - https://www.gnu.org/software/gnulib/manual/html_node/roundevenf.html

    #   - https://www.gnu.org/software/gnulib/manual/html_node/roundeven.html

    #

    # TODO(@rrbutani): this seems to run fine on `aarch64-darwin`, why does it

    # pass there?

    substituteInPlace test/ExecutionEngine/Interpreter/intrinsics.ll \

      --replace "%roundeven32 = call float @llvm.roundeven.f32(float 0.000000e+00)" "" \

      --replace "%roundeven64 = call double @llvm.roundeven.f64(double 0.000000e+00)" ""

  '' + optionalString (stdenv.isDarwin && stdenv.hostPlatform.isx86) ''

    # This test fails on darwin x86_64 because `sw_vers` reports a different

    # macOS version than what LLVM finds by reading

    # `/System/Library/CoreServices/SystemVersion.plist` (which is passed into