[Bug debug/90441] [9/10 Regression] corrupt debug info with LTO

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90441

--- Comment #14 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #13)
> (In reply to Iain Sandoe from comment #12)

current trunk (271111), manual regeneration of the
firmware.elf.ltrans0.ltrans.o ->

(it's kinda frustrating that one can't see the link line, more tweaks are still
needed to help debug LTO - but putting -Wl,--verbose indicates that the right
number of files are presented to, and load correctly)

iains@gcc122:~/gcc-trunk/C$ ../../llvm-710-build/bin/llvm-dwarfdump --verify
firmware.elf.ltrans0.ltrans.o
Verifying firmware.elf.ltrans0.ltrans.o:        file format ELF64-x86-64
Verifying .debug_abbrev...
Verifying .debug_info Unit Header Chain...
Verifying .debug_info references...
error: invalid DIE reference 0x0000001d. Offset is in between DIEs:

0x00000038: DW_TAG_subprogram
              DW_AT_abstract_origin     (0x000000000000001d)
              DW_AT_low_pc      (0x0000000000000000)
              DW_AT_high_pc     (0x0000000000000000)
              DW_AT_frame_base  (DW_OP_call_frame_cfa)
              DW_AT_GNU_all_call_sites  (true)


error: invalid DIE reference 0x0000003b. Offset is in between DIEs:

0x0000004f: DW_TAG_variable
              DW_AT_abstract_origin     (0x000000000000003b)
              DW_AT_location    (DW_OP_addr 0x0)


Errors detected.