[LLVMdev] load widening conflicts with AddressSanitizer

[Chris Lattner]

On Dec 17, 2011, at 7:40 AM, Rafael Ávila de Espíndola wrote:

> On 16/12/11 08:46 PM, Chris Lattner wrote:
>> I'm not opposed to disabling this transformation when asan is on, we just need a clean way to express this in the IR.
> 
> Could clang be aware of asan being on and introduce a "please don't
> widen" metadata on local variable accesses?

Yes, "we just need a clean way to express this in the IR."

LLVM can't have a global "bool ASANIsOn;" that the optimizers listen to.

-Chris