https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94656
Bug ID: 94656
Summary: target_clones on alias leads to segfault in the
compiler
Product: gcc
Version: 9.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: yyc1992 at gmail dot com
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Compiling the following code with `gcc -c` leads to a segfault in the compiler
targetclone pass.
```
__attribute__((target_clones("default,avx")))
void f1()
{
}
__attribute__((target_clones("default,avx"))) void f2()
__attribute__((alias("f1")));
```
The error was.
```
during IPA pass: targetclone
src/s_nextafterl.c:6:1: internal compiler error: Segmentation fault
6 | __attribute__((target_clones("default,avx"))) void f2()
__attribute__((alias("f1")));
| ^~~~~~~~~~~~~
```
Now this came from a hack I was playing around and I'm not going to argue if
having a target_clone on a alias should be supported (though if the target
agrees I think it would be nice to support it... and if not agree a warning
would be better IMHO). However, I don't think a segfault is what should happen
here = = ....
