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

[bernd.edlinger at hotmail dot de]

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

--- Comment #44 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Comment on attachment 46013
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46013
updated patch.

@@ -122,12 +122,21 @@ extern tree arm_fp16_type_node;
 #define TARGET_32BIT_P(flags)  (TARGET_ARM_P (flags) || TARGET_THUMB2_P
(flags))

 /* Run-time Target Specification.  */
-/* Use hardware floating point instructions. */
+/* Use hardware floating point instructions. -mgeneral-regs-only prevents
+the use of floating point instructions and registers but does not prevent
+emission of floating point pcs attributes.  */
 #define TARGET_HARD_FLOAT      (arm_float_abi != ARM_FLOAT_ABI_SOFT    \
+                                && bitmap_bit_p (arm_active_target.isa, \
+                                                 isa_bit_vfpv2) \
+                                && TARGET_32BIT \
+                                && !TARGET_GENERAL_REGS_ONLY)
+
+#define TARGET_HARD_FLOAT_SUB  (arm_float_abi != ARM_FLOAT_ABI_SOFT    \
                                 && bitmap_bit_p (arm_active_target.isa, \
                                                  isa_bit_vfpv2) \
                                 && TARGET_32BIT)


BTW, you could define TARGET_HARD_FLOAT in terms of TARGET_HARD_FLOAT_SUB and
!TARGET_GENERAL_REGS_ONLY.