C2000, cgtools 6.2.5: loop optimized away?

Compiling the following code

volatile unsigned lim;

void for_loop_u(void) {
  unsigned i;
  for (i=0; i<lim; i++);
}

void for_loop_i(void) {
  int i;
  for (i=0; i<lim; i++);
}

with essentially the following options  -k -q -pdr -pdv -pden -pds880 -pds238 -o2 ... -d"LARGE_MODEL" -d"__TMS320F28XX__"  ...  -mi -ml -v28 --float_support=fpu32 --gen_func_subsections -@"../Debug.lkf"
I get assembly output:

;***************************************************************
;* FNAME: _for_loop_u                   FR SIZE:   0           *
;*                                                             *
;* FUNCTION ENVIRONMENT                                        *
;*                                                             *
;* FUNCTION PROPERTIES                                         *
;*                            0 Parameter,  0 Auto,  0 SOE     *
;***************************************************************

_for_loop_u:
    .dwcfi    cfa_offset, -2
    .dwcfi    save_reg_to_mem, 26, 0
    .dwcfi    save_reg_to_reg, 78, 26
        MOVW      DP,#_lim              ; [CPU_U]
    .dwpsn    file "for_loop.c",line 5,column 13,is_stmt
        MOV       AL,@_lim              ; [CPU_] |5|
        BF        $C$L1,EQ              ; [CPU_] |5|
        ; branchcc occurs ; [] |5|
        MOV       AL,@_lim              ; [CPU_] |5|
        MOV       AL,@_lim              ; [CPU_] |5|
$C$L1:    
$C$DW$3    .dwtag  DW_TAG_TI_branch
    .dwattr $C$DW$3, DW_AT_low_pc(0x00)
    .dwattr $C$DW$3, DW_AT_TI_return
        LRETR     ; [CPU_]
        ; return occurs ; []
    .dwattr $C$DW$2, DW_AT_TI_end_file("for_loop.c")
    .dwattr $C$DW$2, DW_AT_TI_end_line(0x06)
    .dwattr $C$DW$2, DW_AT_TI_end_column(0x01)
    .dwendentry
    .dwendtag $C$DW$2

    .sect    ".text:_for_loop_i"
    .clink
    .global    _for_loop_i

$C$DW$4    .dwtag  DW_TAG_subprogram, DW_AT_name("for_loop_i")
    .dwattr $C$DW$4, DW_AT_low_pc(_for_loop_i)
    .dwattr $C$DW$4, DW_AT_high_pc(0x00)
    .dwattr $C$DW$4, DW_AT_TI_symbol_name("_for_loop_i")
    .dwattr $C$DW$4, DW_AT_external
    .dwattr $C$DW$4, DW_AT_TI_begin_file("for_loop.c")
    .dwattr $C$DW$4, DW_AT_TI_begin_line(0x08)
    .dwattr $C$DW$4, DW_AT_TI_begin_column(0x06)
    .dwattr $C$DW$4, DW_AT_TI_max_frame_size(-2)
    .dwpsn    file "for_loop.c",line 8,column 23,is_stmt,address _for_loop_i

    .dwfde $C$DW$CIE, _for_loop_i

;***************************************************************
;* FNAME: _for_loop_i                   FR SIZE:   0           *
;*                                                             *
;* FUNCTION ENVIRONMENT                                        *
;*                                                             *
;* FUNCTION PROPERTIES                                         *
;*                            0 Parameter,  0 Auto,  0 SOE     *
;***************************************************************

_for_loop_i:
;* AL    assigned to _i
$C$DW$5    .dwtag  DW_TAG_variable, DW_AT_name("i")
    .dwattr $C$DW$5, DW_AT_TI_symbol_name("_i")
    .dwattr $C$DW$5, DW_AT_type(*$C$DW$T$10)
    .dwattr $C$DW$5, DW_AT_location[DW_OP_reg0]
    .dwcfi    cfa_offset, -2
    .dwcfi    save_reg_to_mem, 26, 0
    .dwcfi    save_reg_to_reg, 78, 26
        MOVW      DP,#_lim              ; [CPU_U]
    .dwpsn    file "for_loop.c",line 10,column 13,is_stmt
        MOV       AL,@_lim              ; [CPU_] |10|
        BF        $C$L3,EQ              ; [CPU_] |10|
        ; branchcc occurs ; [] |10|
    .dwpsn    file "for_loop.c",line 10,column 8,is_stmt
        MOVB      AL,#0                 ; [CPU_] |10|
$C$L2:    
    .dwpsn    file "for_loop.c",line 10,column 13,is_stmt
        ADDB      AL,#1                 ; [CPU_] |10|
        CMP       AL,@_lim              ; [CPU_] |10|
        B         $C$L2,LO              ; [CPU_] |10|
        ; branchcc occurs ; [] |10|
$C$L3:    
$C$DW$6    .dwtag  DW_TAG_TI_branch
    .dwattr $C$DW$6, DW_AT_low_pc(0x00)
    .dwattr $C$DW$6, DW_AT_TI_return
        LRETR     ; [CPU_]
        ; return occurs ; []
    .dwattr $C$DW$4, DW_AT_TI_end_file("for_loop.c")
    .dwattr $C$DW$4, DW_AT_TI_end_line(0x0b)
    .dwattr $C$DW$4, DW_AT_TI_end_column(0x01)
    .dwendentry
    .dwendtag $C$DW$4

This looks as if the for loop in for_loop_u() has been optimized away despite lim being declared volatile.

Can someone please comment on this?

Thanks and regards

Johannes