diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index ef560ac30bf..c3230726b1e 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -2874,6 +2874,13 @@ unsigned SelectionDAG::ComputeNumSignBits(SDValue Op, unsigned Depth) const { return ComputeNumSignBits(Op.getOperand(0), Depth+1); break; } + case ISD::CONCAT_VECTORS: + // Determine the minimum number of sign bits across all input vectors. + // Early out if the result is already 1. + Tmp = ComputeNumSignBits(Op.getOperand(0), Depth + 1); + for (unsigned i = 1, e = Op.getNumOperands(); (i < e) && (Tmp > 1); ++i) + Tmp = std::min(Tmp, ComputeNumSignBits(Op.getOperand(i), Depth + 1)); + return Tmp; } // If we are looking at the loaded value of the SDNode. |
