llvm dev - Jan 2013 - [LLVMdev] StructType opaque->sized

I'm building a StructType without a body using

	StructType *StructType::create(LLVMContext &Context, StringRef Name);

and then later adding a body to with setBody(). It starts of isOpaque() == true,
and isSized() == false, and after I add the body, isOpaque() == false, but
isSized() is still false.

If I create a StructType using

	StructType * StructType ::create(LLVMContext &Context,
                            ArrayRef<Type*> Elements,
                            StringRef Name,
                            bool isPacked = false);

Then isOpaque() == false and isSized() == true.

Can I not make a sized struct starting with an opaque one and adding a body
later?

-- 
Rick

Hi Rick,

On 22/01/13 09:04, Rick Mann wrote:
> I'm building a StructType without a body using
>
> 	StructType *StructType::create(LLVMContext &Context, StringRef Name);
>
> and then later adding a body to with setBody(). It starts of isOpaque() ==
true, and isSized() == false, and after I add the body, isOpaque() == false, but
isSized() is still false.
this is the standard way of making a struct type, so I suspect you made a
mistake such as adding an opaque field to the struct (this will stop it from
having a size).

Ciao, Duncan.
>
> If I create a StructType using
>
> 	StructType * StructType ::create(LLVMContext &Context,
>                              ArrayRef<Type*> Elements,
>                              StringRef Name,
>                              bool isPacked = false);
>
> Then isOpaque() == false and isSized() == true.
>
> Can I not make a sized struct starting with an opaque one and adding a body
later?
>

On Jan 22, 2013, at 1:54 , Duncan Sands <baldrick at free.fr> wrote:
> this is the standard way of making a struct type, so I suspect you made a
> mistake such as adding an opaque field to the struct (this will stop it
from
> having a size).
Thank you, Duncan. You're absolutely right. I thought I had confirmed the
broken behavior with a simple test case, but that had a problem. I discovered in
my actual struct that I was setting an element to be a function type, not a
pointer-to-function type, just as you were writing your reply, I'd bet.

Thanks!

-- 
Rick