http://llvm.org/bugs/show_bug.cgi?id=6336
Summary: SelectionDAG does not handle scalar second operand to
sign_extend_inreg correctly
Product: libraries
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Common Code Generator Code
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
In SelectionDAG.cpp::UnrollVectorOp the cases for SIGN_EXTEND_INREG and
FP_ROUND_INREG incorrectly assume that the second operand is always a vector
and uses the API function getVectorElementType(). The correct function call to
use is getScalarType so that LLVM does not assert when a scalar is used as the
extension value for a vector type.
Old Code:
case ISD::SIGN_EXTEND_INREG:
case ISD::FP_ROUND_INREG: {
EVT ExtVT =
dyn_cast<VTSDNode>(Operands[1])->getVT().getVectorElementType();
Scalars.push_back(getNode(N->getOpcode(), dl, EltVT,
Operands[0],
getValueType(ExtVT)));
}
New Code:
case ISD::SIGN_EXTEND_INREG:
case ISD::FP_ROUND_INREG: {
EVT ExtVT = dyn_cast<VTSDNode>(Operands[1])->getVT().getScalarType();
Scalars.push_back(getNode(N->getOpcode(), dl, EltVT,
Operands[0],
getValueType(ExtVT)));
}
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