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Fix a few instances found in SelectionDAG where we were not handling F16 at parity with F32 and F64. 

llvm-svn: 223760
This commit is contained in:
Owen Anderson 2014-12-09 06:50:39 +00:00
parent 00a4da73d5
commit 558012a3fc
2 changed files with 5 additions and 3 deletions
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2
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -6651,7 +6651,6 @@ ConstantFoldBITCASTofBUILD_VECTOR(SDNode *BV, EVT DstEltVT) {
if (SrcEltVT.isFloatingPoint()) { if (SrcEltVT.isFloatingPoint()) {
// Convert the input float vector to a int vector where the elements are the // Convert the input float vector to a int vector where the elements are the
// same sizes. // same sizes.
assert((SrcEltVT == MVT::f32 || SrcEltVT == MVT::f64) && "Unknown FP VT!");
EVT IntVT = EVT::getIntegerVT(*DAG.getContext(), SrcEltVT.getSizeInBits()); EVT IntVT = EVT::getIntegerVT(*DAG.getContext(), SrcEltVT.getSizeInBits());
BV = ConstantFoldBITCASTofBUILD_VECTOR(BV, IntVT).getNode(); BV = ConstantFoldBITCASTofBUILD_VECTOR(BV, IntVT).getNode();
SrcEltVT = IntVT; SrcEltVT = IntVT;
@ -6660,7 +6659,6 @@ ConstantFoldBITCASTofBUILD_VECTOR(SDNode *BV, EVT DstEltVT) {
// Now we know the input is an integer vector. If the output is a FP type, // Now we know the input is an integer vector. If the output is a FP type,
// convert to integer first, then to FP of the right size. // convert to integer first, then to FP of the right size.
if (DstEltVT.isFloatingPoint()) { if (DstEltVT.isFloatingPoint()) {
assert((DstEltVT == MVT::f32 || DstEltVT == MVT::f64) && "Unknown FP VT!");
EVT TmpVT = EVT::getIntegerVT(*DAG.getContext(), DstEltVT.getSizeInBits()); EVT TmpVT = EVT::getIntegerVT(*DAG.getContext(), DstEltVT.getSizeInBits());
SDNode *Tmp = ConstantFoldBITCASTofBUILD_VECTOR(BV, TmpVT).getNode(); SDNode *Tmp = ConstantFoldBITCASTofBUILD_VECTOR(BV, TmpVT).getNode();

6
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
View File

@ -2683,6 +2683,8 @@ SDValue SelectionDAG::getNode(unsigned Opcode, SDLoc DL,
return getConstantFP(apf, VT); return getConstantFP(apf, VT);
} }
case ISD::BITCAST: case ISD::BITCAST:
if (VT == MVT::f16 && C->getValueType(0) == MVT::i16)
return getConstantFP(APFloat(APFloat::IEEEhalf, Val), VT);
if (VT == MVT::f32 && C->getValueType(0) == MVT::i32) if (VT == MVT::f32 && C->getValueType(0) == MVT::i32)
return getConstantFP(APFloat(APFloat::IEEEsingle, Val), VT); return getConstantFP(APFloat(APFloat::IEEEsingle, Val), VT);
else if (VT == MVT::f64 && C->getValueType(0) == MVT::i64) else if (VT == MVT::f64 && C->getValueType(0) == MVT::i64)
@ -2756,7 +2758,9 @@ SDValue SelectionDAG::getNode(unsigned Opcode, SDLoc DL,
return getConstant(api, VT); return getConstant(api, VT);
} }
case ISD::BITCAST: case ISD::BITCAST:
if (VT == MVT::i32 && C->getValueType(0) == MVT::f32) if (VT == MVT::i16 && C->getValueType(0) == MVT::f16)
return getConstant((uint16_t)V.bitcastToAPInt().getZExtValue(), VT);
else if (VT == MVT::i32 && C->getValueType(0) == MVT::f32)
return getConstant((uint32_t)V.bitcastToAPInt().getZExtValue(), VT); return getConstant((uint32_t)V.bitcastToAPInt().getZExtValue(), VT);
else if (VT == MVT::i64 && C->getValueType(0) == MVT::f64) else if (VT == MVT::i64 && C->getValueType(0) == MVT::f64)
return getConstant(V.bitcastToAPInt().getZExtValue(), VT); return getConstant(V.bitcastToAPInt().getZExtValue(), VT);