[Bug debug/62225] DW_AT_location for local variable is missing

["qiyao at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62225

--- Comment #3 from Yao Qi <qiyao at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> I bet if you remove register, it will work. Or compile with variable
> tracking turned on.

I compiled the code again with -fvar-tracking, and looks DW_AT_location for
local variable is there.

 <2><9a>: Abbrev Number: 7 (DW_TAG_variable)
    <9b>   DW_AT_name        : l
    <9d>   DW_AT_decl_file   : 1
    <9e>   DW_AT_decl_line   : 15
    <9f>   DW_AT_type        : <0x25>
    <a3>   DW_AT_location    : 0x0 (location list)
 <2><a7>: Abbrev Number: 7 (DW_TAG_variable)
    <a8>   DW_AT_name        : r
    <aa>   DW_AT_decl_file   : 1
    <ab>   DW_AT_decl_line   : 15
    <ac>   DW_AT_type        : <0x25>
    <b0>   DW_AT_location    : 0x2a (location list)

Contents of the .debug_loc section:

    Offset   Begin    End      Expression
    00000000 080483b1 080483b4 (DW_OP_reg11 (st0))
    0000000b 080483b4 080483cf (DW_OP_fbreg: 0)
    00000017 080483cf 080483d2 (DW_OP_reg11 (st0))
    00000022 <End of list>
    0000002a 080483b4 080483cb (DW_OP_reg11 (st0))
    00000035 080483cb 080483ef (DW_OP_fbreg: 12)
    00000041 <End of list>