[llvm-commits] [llvm-gcc-4.2] r46450 - in /llvm-gcc-4.2/trunk/gcc: llvm-abi.h llvm-internal.h llvm-types.cpp

[Duncan Sands]

Hi Evan,

> > You should let QUAL_UNION through here as well.  And what about size- 
> > zero
> > arrays?  Or for that matter, zero size anything?
> 
> What exactly is QUAL_UNION? I am pretty sure other cases (especially  
> zero sized arrays) are handled differently.

QUAL_UNION is a union with an associated variable saying which of the
union fields you can use (so this is only known at runtime in general).
It is not used by the C-like languages.  It is used by Ada to implement
variant records, which I think Ada inherited from Pascal.  You can mostly
treat a QUAL_UNION the same as a union.

Ciao,

Duncan.