[Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89093

--- Comment #34 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
@@ -30877,6 +30883,11 @@ arm_valid_target_attribute_rec (tree args, struct
gcc_options *opts)
       else if (!strncmp (q, "arm", 3))
          opts->x_target_flags &= ~MASK_THUMB;

+      else if (!strncmp (q, "general-regs-only", strlen
("general-regs-only")))
+       {
+         opts->x_target_flags |= MASK_GENERAL_REGS_ONLY;
+       }
+
       else if (!strncmp (q, "fpu=", 4))
        {
          int fpu_index;

I'm really not sure I understand this strncmp (but also the ones for arm and
thumb), does that mean you want to accept also general-regs-only123 or
general-regs-onlycorgewaldo or thumb__ ?  If you want to support e.g. only
optional whitespace after the string, each handled case should update the
pointer and then something after it should verify/diagnose.
Also, single stmt if bodies shouldn't be wrapped with {} and the arm case is
misindented.

Otherwise, I think the eh_personality.cc change is acceptable to me (but ask
Jonathan or other libstdc++ maintainers).