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| author | Chris Lattner <sabre@nondot.org> | 2007-04-12 05:58:43 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-04-12 05:58:43 +0000 |
| commit | a77cb3ce68ab1c4de384de5ebb77084f80328d06 (patch) | |
| tree | b84f33931110b6c47b4dd9c2f8fd2d93a830865d /llvm/lib/CodeGen | |
| parent | 9bab80543a7230ebfb02472479d1d28f8ac412a4 (diff) | |
| download | bcm5719-llvm-a77cb3ce68ab1c4de384de5ebb77084f80328d06.tar.gz bcm5719-llvm-a77cb3ce68ab1c4de384de5ebb77084f80328d06.zip | |
fold noop vbitconvert instructions
llvm-svn: 35943
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index a51f79f592b..7c8a94eaf5e 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -1484,6 +1484,15 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, MVT::getVectorNumElements(VT) == N3.getNumOperands() && "Illegal VECTOR_SHUFFLE node!"); break; + case ISD::VBIT_CONVERT: + // Fold vbit_convert nodes from a type to themselves. + if (N1.getValueType() == MVT::Vector) { + assert(isa<ConstantSDNode>(*(N1.Val->op_end()-2)) && + isa<VTSDNode>(*(N1.Val->op_end()-1)) && "Malformed vector input!"); + if (*(N1.Val->op_end()-2) == N2 && *(N1.Val->op_end()-1) == N3) + return N1; + } + break; } // Memoize node if it doesn't produce a flag. |
