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Fix a bug in FindMemType. When widening vector loads, use a wider memory type

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only if the number of packed elements is a power of two.
Bug found in Duncan's testcase.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132923 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem 2011-06-13 18:13:24 +00:00
parent 83f9467436
commit 00404bfaef
1 changed files with 2 additions and 0 deletions
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2
lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
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@ -2164,6 +2164,7 @@ static EVT FindMemType(SelectionDAG& DAG, const TargetLowering &TLI,
if (MemVT.getSizeInBits() <= WidenEltWidth)
break;
if (TLI.isTypeLegal(MemVT) && (WidenWidth % MemVTWidth) == 0 &&
isPowerOf2_32(WidenWidth / MemVTWidth) &&
(MemVTWidth <= Width ||
(Align!=0 && MemVTWidth<=AlignInBits && MemVTWidth<=Width+WidenEx))) {
RetVT = MemVT;
@ -2179,6 +2180,7 @@ static EVT FindMemType(SelectionDAG& DAG, const TargetLowering &TLI,
unsigned MemVTWidth = MemVT.getSizeInBits();
if (TLI.isTypeLegal(MemVT) && WidenEltVT == MemVT.getVectorElementType() &&
(WidenWidth % MemVTWidth) == 0 &&
isPowerOf2_32(WidenWidth / MemVTWidth) &&
(MemVTWidth <= Width ||
(Align!=0 && MemVTWidth<=AlignInBits && MemVTWidth<=Width+WidenEx))) {
if (RetVT.getSizeInBits() < MemVTWidth || MemVT == WidenVT)