[llvm-commits] [llvm] r61009 - /llvm/trunk/lib/Transforms/Scalar/GVN.cpp

[Owen Anderson]

On Dec 14, 2008, at 12:21 PM, Chris Lattner wrote:
> What if the scalar value being analyzed is a load?
>
> -Chris
>>
>>  Value* v = CollapsePhi(PN);
>>  if (!v) {
>>    // Cache our phi construction results
>> -    phiMap[orig->getPointerOperand()].insert(PN);
>> +    if (LoadInst* L = dyn_cast<LoadInst>(orig))
>> +      phiMap[L->getPointerOperand()].insert(PN);
>> +    else
>> +      phiMap[orig].insert(PN);
>> +
>>    return PN;

You'll notice that there's a special case for loads in the one place  
that it matters.

--Owen
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