diff options
Diffstat (limited to 'lib/Target/Sparc')
| -rw-r--r-- | lib/Target/Sparc/SparcISelDAGToDAG.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/Target/Sparc/SparcISelDAGToDAG.cpp b/lib/Target/Sparc/SparcISelDAGToDAG.cpp index a9c4950614..b02e8600b4 100644 --- a/lib/Target/Sparc/SparcISelDAGToDAG.cpp +++ b/lib/Target/Sparc/SparcISelDAGToDAG.cpp @@ -669,6 +669,24 @@ LowerOperation(SDOperand Op, SelectionDAG &DAG) { SDOperand TrueVal = Op.getOperand(2); SDOperand FalseVal = Op.getOperand(3); + // If this is a select_cc of a "setcc", and if the setcc got lowered into + // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values. + if (isa<ConstantSDNode>(RHS) && cast<ConstantSDNode>(RHS)->getValue() == 0&& + CC == ISD::SETNE && + ((LHS.getOpcode() == V8ISD::SELECT_ICC && + LHS.getOperand(3).getOpcode() == V8ISD::CMPICC) || + (LHS.getOpcode() == V8ISD::SELECT_FCC && + LHS.getOperand(3).getOpcode() == V8ISD::CMPFCC)) && + isa<ConstantSDNode>(LHS.getOperand(0)) && + isa<ConstantSDNode>(LHS.getOperand(1)) && + cast<ConstantSDNode>(LHS.getOperand(0))->getValue() == 1 && + cast<ConstantSDNode>(LHS.getOperand(1))->getValue() == 0) { + SDOperand CMPCC = LHS.getOperand(3); + CC = cast<ConstantSDNode>(LHS.getOperand(2))->getValue(); + LHS = CMPCC.getOperand(0); + RHS = CMPCC.getOperand(1); + } + SDOperand CompareFlag; unsigned Opc; if (LHS.getValueType() == MVT::i32) { |