Thank you. I fixed the error. it caused by macro:
#define ELIMINABLE_REGS \
{\
{ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
{FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \
}
because everytime when gcc check the frame_pointer_need, if it is
false, aim eliminated register is SP.
But in the former array, gcc still got FP. So error accurred.
Now it is OK with the following:
#define ELIMINABLE_REGS \
{\
{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
{ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
{FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \
}
just exchange the former two elements.
So thanks for your guys.
