[llvm-commits] [PATCH][RFC] PR10367: don't allow GlobalAlias's aliasee to be an arbitrary Constant

[Chris Lattner]

On Jul 28, 2011, at 1:21 PM, Duncan Sands wrote:

> Hi Jay, thanks for working on this.
> 
>> To summarise the PR, Chris said that a GlobalAlias's aliasee should
>> always be a GlobalValue (we shouldn't allow arbitrary Constants), and
>> the types of the alias and the aliasee shouldn't be required to match.
> 
> If we go this way then we eliminate the possibility of having an alias into
> the middle of a global variable.  

I don't see that this is something we can support.  Aliases are a very simple conceptual model, it isn't clear that extending them to support this is a good cost/benefit tradeoff.  Is this supported by ELF?

-Chris