#4027 function pointers don't respect __banked keyword

[Under4Mhz]

When assigning banked functions to a pointer, the banked keyword is not respected. When a banked function is assigned to a banked pointer, no banking is performed.

This could be considered a feature request. If so, it would be preferable if the compiler complained it's not supported.

/// GPL 2.0 or later
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>

void ArRun() __banked;
void GlRun() __banked;
void GameLoop();

void (*gameList[])(void) __banked = {ArRun, GlRun };

void GameSet2( int game ) {

    switch( game ) {

        case 0: ArRun();
        case 1: GlRun();
    }
}

void GameSet( int game ) {

    void (*callback)(void) __banked = gameList[game];
    (*callback)();
    (*gameList[game])();
}

///< Identical first 16K between roms
int main() {

    int game = 1;
    GameSet( game );
}

// sdcc -mz80 --fverbose-asm ./bank_function_ptr.c  -o bank_function_ptr.ihx

Produces the following assembly:

;./bank_function_ptr.c:15: void GameSet2( int game ) {
;   ---------------------------------
; Function GameSet2
; ---------------------------------
_GameSet2::
;./bank_function_ptr.c:17: switch( game ) {
    ld  a, h
    or  a, l
    jr  z, 00101$
    ld  a, l
    dec a
    or  a, h
    jr  z, 00102$
    ret
;./bank_function_ptr.c:19: case 0: ArRun();
00101$:
    ld  e, #b_ArRun
    ld  hl, #_ArRun
    call    ___sdcc_bcall_ehl
;./bank_function_ptr.c:20: case 1: GlRun();
00102$:
    ld  e, #b_GlRun
    ld  hl, #_GlRun
;./bank_function_ptr.c:21: }
;./bank_function_ptr.c:22: }
    jp  ___sdcc_bcall_ehl
;./bank_function_ptr.c:24: void GameSet( int game ) {
;   ---------------------------------
; Function GameSet
; ---------------------------------
_GameSet::
;./bank_function_ptr.c:26: void (*callback)(void) __banked = gameList[game];
    ld  bc, #_gameList+0
    add hl, hl
    add hl, bc
    ld  c, (hl)
    inc hl
    ld  b, (hl)
    dec hl
;./bank_function_ptr.c:27: (*callback)();
    push    hl
    ld  l, c
    ld  h, b
    call    ___sdcc_call_hl
    pop hl
;./bank_function_ptr.c:28: (*gameList[game])();
    ld  a, (hl)
    inc hl
    ld  h, (hl)
    ld  l, a
;./bank_function_ptr.c:29: }
    jp  (hl)

$ sdcc -v
SDCC : z80/sm83/ez80/z80n/mos6502/mos65c02 4.6.0 #16608 (Linux)