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Fix PR3899: add support for extracting floats from vectors

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when using -soft-float.
Based on a patch by Jakob Stoklund Olesen.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67996 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2009-03-29 13:51:06 +00:00
parent 54e01d06db
commit 004e27cc1b
4 changed files with 32 additions and 0 deletions
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9
lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
View File

@ -59,6 +59,8 @@ void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
case ISD::ConstantFP:
R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
break;
case ISD::EXTRACT_VECTOR_ELT:
R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break;
case ISD::FABS: R = SoftenFloatRes_FABS(N); break;
case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break;
@ -113,6 +115,13 @@ SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
TLI.getTypeToTransformTo(N->getValueType(0)));
}
SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, N->getDebugLoc(),
NewOp.getValueType().getVectorElementType(),
NewOp, N->getOperand(1));
}
SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
unsigned Size = NVT.getSizeInBits();

11
lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
View File

@ -858,6 +858,17 @@ SDValue DAGTypeLegalizer::BitConvertToInteger(SDValue Op) {
MVT::getIntegerVT(BitWidth), Op);
}
/// BitConvertVectorToIntegerVector - Convert to a vector of integers of the
/// same size.
SDValue DAGTypeLegalizer::BitConvertVectorToIntegerVector(SDValue Op) {
assert(Op.getValueType().isVector() && "Only applies to vectors!");
unsigned EltWidth = Op.getValueType().getVectorElementType().getSizeInBits();
MVT EltNVT = MVT::getIntegerVT(EltWidth);
unsigned NumElts = Op.getValueType().getVectorNumElements();
return DAG.getNode(ISD::BIT_CONVERT, Op.getDebugLoc(),
MVT::getVectorVT(EltNVT, NumElts), Op);
}
SDValue DAGTypeLegalizer::CreateStackStoreLoad(SDValue Op,
MVT DestVT) {
DebugLoc dl = Op.getDebugLoc();

2
lib/CodeGen/SelectionDAG/LegalizeTypes.h
View File

@ -190,6 +190,7 @@ private:
// Common routines.
SDValue BitConvertToInteger(SDValue Op);
SDValue BitConvertVectorToIntegerVector(SDValue Op);
SDValue CreateStackStoreLoad(SDValue Op, MVT DestVT);
bool CustomLowerResults(SDNode *N, MVT VT, bool LegalizeResult);
SDValue GetVectorElementPointer(SDValue VecPtr, MVT EltVT, SDValue Index);
@ -392,6 +393,7 @@ private:
SDValue SoftenFloatRes_BIT_CONVERT(SDNode *N);
SDValue SoftenFloatRes_BUILD_PAIR(SDNode *N);
SDValue SoftenFloatRes_ConstantFP(ConstantFPSDNode *N);
SDValue SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N);
SDValue SoftenFloatRes_FABS(SDNode *N);
SDValue SoftenFloatRes_FADD(SDNode *N);
SDValue SoftenFloatRes_FCEIL(SDNode *N);

10
test/CodeGen/Generic/2009-03-29-SoftFloatVectorExtract.ll Normal file
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@ -0,0 +1,10 @@
; RUN: llvm-as < %s | llc -soft-float
; PR3899
@m = external global <2 x double>;
define double @vector_ex() nounwind {
%v = load <2 x double>* @m
%x = extractelement <2 x double> %v, i32 1
ret double %x
}