[cfe-commits] Please review: enable TBAA at "-O0 -fthread-sanitizer"

[Chris Lattner]

On Apr 5, 2012, at 9:43 AM, Kostya Serebryany wrote:

> Hello, 
> 
> Please review the following patch:
> ThreadSanitizer instrumentation relies on TBAA for correctness, so we need to generate TBAA at "-O0 -fthread-sanitizer". 

This is close, but not the right solution.  TBAA can cause a semantic change when enabled (though I admit it is unlikely given that nearly all of the optimizers are disabled at -O0).

The right fix is for TSAN to generate *vtable* TBAA info, but not other TBAA info.

-Chris