https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82273
Bug ID: 82273
Summary: unnecessary dwarf info
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: nathan at gcc dot gnu.org
Target Milestone: ---
Created attachment 42213
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42213&action=edit
example frob(int) is inlined into caller.
the dwarf info for an inlinable function's abstract decl contains an
linkage_name field, even when there is no non-inlined body emitted. This seems
wasteful (and is leading to user confusion).
For example the attached program compiled with -g -O2 has the following snipped
of dwarf:
<2><5d>: Abbrev Number: 4 (DW_TAG_inlined_subroutine)
<5e> DW_AT_abstract_origin: <0x82>
<62> DW_AT_low_pc : 0x3
<6a> DW_AT_high_pc : 0x3
<72> DW_AT_call_file : 1
<73> DW_AT_call_line : 9
...
<1><82>: Abbrev Number: 7 (DW_TAG_subprogram)
<83> DW_AT_external : 1
<83> DW_AT_name : (indirect string, offset: 0x90): frob
<87> DW_AT_decl_file : 1
<88> DW_AT_decl_line : 1
<89> DW_AT_linkage_name: (indirect string, offset: 0x87): _Z4frobi
<8d> DW_AT_type : <0x7b>
<91> DW_AT_inline : 3 (declared as inline and inlined)
The external marker is also a little confusing
