diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index f1ca734..e3c2139 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -2596,17 +2596,13 @@ void SelectionDAGBuilder::visitSPDescriptorParent(StackProtectorDescriptor &SPD, MachineMemOperand::MOVolatile); } - // Perform the comparison via a subtract/getsetcc. - EVT VT = Guard.getValueType(); - SDValue Sub = DAG.getNode(ISD::SUB, dl, VT, Guard, GuardVal); - + // Perform the comparison via a getsetcc. SDValue Cmp = DAG.getSetCC(dl, TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), - Sub.getValueType()), - Sub, DAG.getConstant(0, dl, VT), ISD::SETNE); + Guard.getValueType()), + Guard, GuardVal, ISD::SETNE); - // If the sub is not 0, then we know the guard/stackslot do not equal, so - // branch to failure MBB. + // If the guard/stackslot do not equal, branch to failure MBB. SDValue BrCond = DAG.getNode(ISD::BRCOND, dl, MVT::Other, GuardVal.getOperand(0), Cmp, DAG.getBasicBlock(SPD.getFailureMBB())); |