https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66762
--- Comment #8 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #7)
> I tried to investigate:
> gfortran ./gcc/testsuite/gfortran.dg/submodule_6.f08 -flto
>
> If I compare corresponding argument passed to output_addr_const w/o LTO, I
> see:
> (const_int 54796891 [0x344225b])
>
> ,instead of:
> (mem/u/f/c:DI (symbol_ref/f:DI ("*.LC0") [flags 0x2] <var_decl
> 0x7fbb9b3d52d0 *.LC0>) [0 S8 A64])
>
> Thus it looks for me that in case of LTO, it is unable to resolve offset of
> the variable *.LC0:
>
> <var_decl 0x7ffff6a2c2d0 *.LC0
> type <pointer_type 0x7ffff6e23888
> type <record_type 0x7ffff6e237e0 t_a BLK
> size <integer_cst 0x7ffff6c2bc30 constant 0>
> unit size <integer_cst 0x7ffff6c2bbe8 constant 0>
> align 8 symtab 0 alias set 0 canonical type 0x7ffff6e1ef18
> context <namespace_decl 0x7ffff6e225f0 mod_a>
> pointer_to_this <pointer_type 0x7ffff6e23888> chain <type_decl
> 0x7ffff6e22688 D.3955>>
> unsigned DI
> size <integer_cst 0x7ffff6c2bbb8 constant 64>
> unit size <integer_cst 0x7ffff6c2bbd0 constant 8>
> align 64 symtab 0 alias set 0 canonical type 0x7ffff6c44738>
> readonly addressable static unsigned ignored in-constant-pool DI file
> (null) line 0 col 0 size <integer_cst 0x7ffff6c2bbb8 64> unit size
> <integer_cst 0x7ffff6c2bbd0 8>
> align 64 initial <constructor 0x7ffff6e24390>>
>
> Martin
Dear Martin,
Thanks for taking a look. I am sorry to have taken so long to get back to you
but I have had a myriad of other things to do.
Do you by any chance know, which variable is causing the trouble? I am afraid
that *.LCO doesn't help me very much. This is wading around in a part of gcc
that I know essentially nothing about.
If it is lto___mod_a_MOD___vtab_mod_a_T_a, then is the multiplicity of sections
that is preventing the resolution of the offset?
Thanks in advance
Paul
