https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87706
Bug ID: 87706
Summary: Inlined functions trigger invalid -Wmissing-profile
warning
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Considering following example:
$ cat sra-6.c
int g;
static
void cow (int a, int b)
{
if (a)
g = 123;
}
int main(int argc, char **argv)
{
cow (argc, 0);
return 0;
}
One can see:
$ gcc sra-6.c -O2 -fprofile-generate -Wall && ./a.out && gcc sra-6.c -O2
-fprofile-use
sra-6.c: In function ‘cow’:
sra-6.c:4:6: warning: profile for function ‘cow’ not found in profile data
[-Wmissing-profile]
4 | void cow (int a, int b)
| ^~~
Problem is the function 'cow' is removed in IPA passes and as IPA profile
happens before it we see the warning.
One possible solution would be to mark all cgraph_nodes with missing profile
and emit warnings later after we have final symbols.
Honza?
