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eliminate the Constant::getVectorElements method. There are better (and

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more robust) ways to do what it was doing now.  Also, add static methods
for decoding a ShuffleVector mask.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149028 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2012-01-26 02:51:13 +00:00
parent d59ae907ee
commit 56243b89e7
6 changed files with 32 additions and 69 deletions
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20
lib/VMCore/ConstantFold.cpp
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@@ -1697,20 +1697,20 @@ Constant *llvm::ConstantFoldCompareInstruction(unsigned short pred,
R==APFloat::cmpEqual);
}
} else if (C1->getType()->isVectorTy()) {
SmallVector<Constant*, 16> C1Elts, C2Elts;
C1->getVectorElements(C1Elts);
C2->getVectorElements(C2Elts);
if (C1Elts.empty() || C2Elts.empty())
return 0;
// If we can constant fold the comparison of each element, constant fold
// the whole vector comparison.
SmallVector<Constant*, 4> ResElts;
// Compare the elements, producing an i1 result or constant expr.
for (unsigned i = 0, e = C1Elts.size(); i != e; ++i)
ResElts.push_back(ConstantExpr::getCompare(pred, C1Elts[i], C2Elts[i]));
return ConstantVector::get(ResElts);
for (unsigned i = 0, e = C1->getType()->getVectorNumElements(); i != e;++i){
Constant *C1E = C1->getAggregateElement(i);
Constant *C2E = C2->getAggregateElement(i);
if (C1E == 0 || C2E == 0) break;
ResElts.push_back(ConstantExpr::getCompare(pred, C1E, C2E));
}
if (ResElts.size() == C1->getType()->getVectorNumElements())
return ConstantVector::get(ResElts);
}
if (C1->getType()->isFloatingPointTy()) {