https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89613
Bug ID: 89613
Summary: ICF disambuigation doesn't work
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: jmuizelaar at mozilla dot com
Target Milestone: ---
Compiling the following with gcc-7.3 -flto -O2 -gdwarf-5
__attribute__((noinline)) int a() {
return 5;
}
__attribute__((noinline)) int b() {
return 5;
}
int main() {
return a() + b();
}
gives:
< 1><0x0000002a> DW_TAG_subprogram
DW_AT_name a
DW_AT_decl_file 0x00000001
/home/jrmuizel/tools/icf-disambiguation/test.c
DW_AT_decl_line 0x00000001
DW_AT_type <0x00000045>
DW_AT_low_pc 0x00000630
DW_AT_high_pc <offset-from-lowpc>6
DW_AT_frame_base len 0x0001: 9c:
DW_OP_call_frame_cfa
DW_AT_call_all_calls yes(1)
< 1><0x00000045> DW_TAG_base_type
DW_AT_byte_size 0x00000004
DW_AT_encoding DW_ATE_signed
DW_AT_name int
< 1><0x0000004c> DW_TAG_subprogram
DW_AT_external yes(1)
DW_AT_name main
DW_AT_decl_file 0x00000001
/home/jrmuizel/tools/icf-disambiguation/test.c
DW_AT_decl_line 0x0000000a
DW_AT_type <0x00000045>
DW_AT_low_pc 0x00000500
DW_AT_high_pc <offset-from-lowpc>19
DW_AT_frame_base len 0x0001: 9c:
DW_OP_call_frame_cfa
DW_AT_call_all_calls yes(1)
< 2><0x00000069> DW_TAG_call_site
DW_AT_call_return_pc 0x00000507
DW_AT_call_origin <0x0000002a>
< 2><0x00000076> DW_TAG_call_site
DW_AT_call_return_pc 0x00000510
which doesn't have a DW_AT_call_origin for the second call to 'a'
