Clang doesn't support __attribute__((returns_twice))

[llvmbot]

Bugzilla Link	6287
Resolution	FIXED
Resolved on	Apr 12, 2010 11:11
Version	trunk
OS	Windows NT
Blocks	llvm/llvm-bugzilla-archive#6815
Reporter	LLVM Bugzilla Contributor

Extended Description

Testcase :

void attribute((returns_twice)) foo();

Clang emits a warning: 'returns_twice' attribute ignored

[lattner]

Fixed in r101005/101006

[llvmbot]

Fixed in r101005/101006

I wonder if the issues can be simply fixed by ignoring the attribute, or that the compiler needs to do something to actually handle it. If it's the latter, then marking the bug as fixed would, imho, hide the fact that the attribute is ignored and not supported as the bug title implies.

[lattner]

llvm-gcc also just ignores the attribute, I'm pretty sure its safe.

[llvmbot]

mentioned in issue llvm/llvm-bugzilla-archive#6815