https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97586
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> --- One can trigger it only with one debug counter value: -fdbg-cnt=ipa_mod_ref:869-869 (and multiple LTRANS partitions). The only changed function is in: comp_unit_maybe_decode_line_info (struct comp_unit * unit) ... --- good/addr2line.ltrans7.ltrans.122t.dom2 2020-10-27 10:06:56.935982898 +0100 +++ bad/addr2line.ltrans7.ltrans.122t.dom2 2020-10-27 10:06:29.248177802 +0100 @@ -25035,6 +25035,8 @@ threading bb 269 up to 16 stmts threading bb 269 kills 1 stmts threading bb 269 up to 16 stmts +***dbgcnt: lower limit 869 reached for ipa_mod_ref.*** +***dbgcnt: upper limit 869 reached for ipa_mod_ref.*** threading bb 141 kills 9 stmts threading bb 141 up to 24 stmts threading bb 139 kills 2 stmts @@ -27429,9 +27431,9 @@ # DEBUG dir => dir_142 # DEBUG BEGIN_STMT _143 = line_ptr; - _144 = bytes_read; - _145 = (sizetype) _144; - _146 = _143 + _145; + _144 = _481; + _145 = _138; + _146 = _143 + _138; line_ptr = _146; # DEBUG BEGIN_STMT _147 = _bfd_safe_read_leb128.constprop (_146, &bytes_read, 0, line_end_55); The change is: ***dbgcnt: lower limit 869 reached for ipa_mod_ref.*** ***dbgcnt: upper limit 869 reached for ipa_mod_ref.*** ipa-modref: call stmt _141 = _bfd_safe_read_leb128.constprop (_140, &bytes_read, 0, line_end_55); ipa-modref: call to _bfd_safe_read_leb128.constprop/17919 does not clobber ref: bytes_read alias sets: 7->7 FIND: _481 Replaced redundant expr '[../bfd/../../bfd/dwarf2.c:2321:13] bytes_read' with '_481' ==== ASGN _144 = _481
