[Bug c/108019] [ARM] D16 float register was used but not saved in integer-dominated code

[zhangyuan21 at xiaomi dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108019

--- Comment #5 from zyfeier <zhangyuan21 at xiaomi dot com> ---
Compile Information:

CC:  timers/arch_alarm.c
arm-none-eabi-gcc -c -Wstrict-prototypes -nostdlib -pipe "-O3"
-fno-strict-aliasing -fno-omit-frame-pointer -fno-optimize-sibling-calls
-fstack-protector-all -fsanitize=kernel-address -fno-common -Wall -Wshadow
-Wundef -ffunction-sections -fdata-sections -g -mcpu=cortex-a7 -mfloat-abi=hard
-mfpu=neon-vfpv4 -mlittle-endian    -I. -isystem /home/code/nuttx/include
-D__NuttX__ -D__KERNEL__ -Wno-cpp -I /home/code/nuttx/drivers/bch -I
/home/code/nuttx/drivers/crypto -I /home/code/nuttx/drivers/motor -I
/home/code/nuttx/drivers/i2c -I /home/code/nuttx/drivers/input -I
/home/code/nuttx/drivers/ioexpander -I /home/code/nuttx/drivers/lcd -I
/home/code/nuttx/drivers/loop -I /home/code/nuttx/drivers/mmcsd -I
/home/code/nuttx/drivers/rptun -I /home/code/nuttx/openamp/open-amp/lib -I
/home/code/nuttx/drivers/sensors -I /home/code/nuttx/drivers/usbhost -I
/home/code/nuttx/drivers/video   timers/arch_alarm.c -o  arch_alarm.o