https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119523
Bug ID: 119523
Summary: missing tail call with aggregate returns wrappers with
extraction inbetween
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Keywords: missed-optimization, tail-call
Severity: enhancement
Priority: P3
Component: tree-optimization
Assignee: pinskia at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
Target Milestone: ---
Take:
```
typedef struct wrapper{int i;} wrapper;
wrapper f();
wrapper g()
{
int t = f().i;
return (wrapper){t};
}
wrapper g1()
{
return f();
}
```
GCC is able to sibcall f inside g1 (since r7-4743-g9713daa015b807) but not
inside g.
The IR for PR 119493 shows the same issue here after SRA. Though the fix for PR
119493 is to support aggregate arguments for tail recursion; it will still be a
good idea to fix this as it might show up with other code.
Working on a fix.
