llvmPackages_16.llvm: avoid calling roundevenf on darwin

pkgs/development/compilers/llvm/16/llvm/default.nix

@@ -165,21 +165,19 @@ in
     # 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