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INSERT_VECTOR_ELT lowering bug: 

store vector to $esp
  store element to $esp + sizeof(VT) * index
  load  vector from $esp
The bug is VT is the type of the vector element, not the type of the vector!

llvm-svn: 27517
This commit is contained in:
Evan Cheng 2006-04-08 01:46:37 +00:00
parent 6025241ee4
commit 78e3d565af
1 changed files with 11 additions and 14 deletions
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25
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -867,30 +867,27 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
// with a "move to register" or "extload into register" instruction, then
// permute it into place, if the idx is a constant and if the idx is
// supported by the target.
SDOperand StackPtr = CreateStackTemporary(Tmp1.getValueType());
MVT::ValueType VT = Tmp1.getValueType();
MVT::ValueType EltVT = Tmp2.getValueType();
MVT::ValueType IdxVT = Tmp3.getValueType();
MVT::ValueType PtrVT = TLI.getPointerTy();
SDOperand StackPtr = CreateStackTemporary(VT);
// Store the vector.
SDOperand Ch = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
Tmp1, StackPtr, DAG.getSrcValue(NULL));
// Truncate or zero extend offset to target pointer type.
MVT::ValueType IntPtr = TLI.getPointerTy();
if (Tmp3.getValueType() > IntPtr)
Tmp3 = DAG.getNode(ISD::TRUNCATE, IntPtr, Tmp3);
else
Tmp3 = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, Tmp3);
unsigned CastOpc = (IdxVT > PtrVT) ? ISD::TRUNCATE : ISD::ZERO_EXTEND;
Tmp3 = DAG.getNode(CastOpc, PtrVT, Tmp3);
// Add the offset to the index.
unsigned EltSize = MVT::getSizeInBits(Result.getValueType())/8;
Tmp3 = DAG.getNode(ISD::MUL, Tmp3.getValueType(), Tmp3,
DAG.getConstant(EltSize, Tmp3.getValueType()));
SDOperand StackPtr2 =
DAG.getNode(ISD::ADD, Tmp3.getValueType(), Tmp3, StackPtr);
unsigned EltSize = MVT::getSizeInBits(EltVT)/8;
Tmp3 = DAG.getNode(ISD::MUL, IdxVT, Tmp3,DAG.getConstant(EltSize, IdxVT));
SDOperand StackPtr2 = DAG.getNode(ISD::ADD, IdxVT, Tmp3, StackPtr);
// Store the scalar value.
Ch = DAG.getNode(ISD::STORE, MVT::Other, Ch,
Tmp2, StackPtr2, DAG.getSrcValue(NULL));
// Load the updated vector.
Result = DAG.getLoad(Result.getValueType(), Ch, StackPtr,
DAG.getSrcValue(NULL));
Result = DAG.getLoad(VT, Ch, StackPtr, DAG.getSrcValue(NULL));
break;
}
}