[llvm-commits] [llvm] r45620 - /llvm/trunk/lib/Target/X86/X86InstrInfo.cpp

[Chris Lattner]

On Jan 4, 2008, at 10:59 PM, Bill Wendling wrote:

> On Jan 4, 2008, at 10:49 PM, Evan Cheng wrote:
>> Although, isReallySideEffectFree looks wrong. How is this checked?
>> ...
>> Bill, how are you checking the Global address isn't redefined  
>> anywhere else?
>>
> How would you suggest I check that?

You aren't looking for loads *from the global*, you're looking for  
loads from the *stub for the global*, which are always invariant.  You  
just need to know whether the load is from a global or from its stub.

-Chris