[llvm-commits] [llvm] r108351 - /llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp

[Owen Anderson]

On Jul 15, 2010, at 12:12 AM, Duncan Sands wrote:
> 
>> +  Instruction *BonusInst = 0;
>> +  if (&*FrontIt != Cond&&
>> +      (*FrontIt).hasOneUse()&&  *(*FrontIt).use_begin() == Cond&&
>> +      (*FrontIt).isSafeToSpeculativelyExecute()&&
>> +      !(*FrontIt).mayReadFromMemory()) {
> 
> Why the check on mayReadFromMemory?

We don't want to speculatively execute a load before a null check.

--Owen
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20100715/9a6b2913/attachment.html>