yonghong-song added a comment.
In D83242#2154145 <https://reviews.llvm.org/D83242#2154145>, @ast wrote:
> lgtm.
> curious what happens when type is defined within args, like:
> __builtin_preserve_field_info(*(struct { int a; } *)0, 2);
-bash-4.4$ clang -target bpf -O2 -g -S t1.c
t1.c:3:40: error: __builtin_preserve_field_info argument 1 invalid
return __builtin_preserve_field_info(*(struct { int a; } *)0, 2);
it will flag out an error since an non-empty name is required
as we will need it to generate relocation.
if (!RT || RT->getDecl()->getDeclName().isEmpty())
With an name, it works properly.
-bash-4.4$ cat t1.c
unsigned unit1() {
return __builtin_preserve_field_info(*(struct t { int a; } *)0, 2);
}
-bash-4.4$ clang -target bpf -O2 -g -S t1.c
-bash-4.4$
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D83242/new/
https://reviews.llvm.org/D83242
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
