[PATCH] Globals in non-zero address spaces might be null

[Mehdi Amini via llvm-commits]

> On Aug 26, 2015, at 4:44 PM, Pete Cooper <peter_cooper at apple.com> wrote:
> 
> Hi Philip
> 
> This is an offshoot of the conversation we had here: http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20150824/295815.html <http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20150824/295815.html>
> 
> The attached patch make sure that we only add nonnull attributes to globals in address space 0.  Other address spaces may or may not permit a global to live at address 0, but we have to assume that they might.

Isn’t something that should be target configurable? Any reason for not having TTI with a default behavior which would be the current one, but that targets could customize?

— 
Mehdi

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