diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index 731ea553222..248c7bafd5d 100644 --- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -1785,9 +1785,21 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){ break; } case ISD::SIGN_EXTEND: { + SDOperand In; + switch (getTypeAction(Node->getOperand(0).getValueType())) { + case Expand: assert(0 && "expand-expand not implemented yet!"); + case Legal: In = LegalizeOp(Node->getOperand(0)); break; + case Promote: + In = PromoteOp(Node->getOperand(0)); + // Emit the appropriate sign_extend_inreg to get the value we want. + In = DAG.getNode(ISD::SIGN_EXTEND_INREG, In.getValueType(), In, + Node->getOperand(0).getValueType()); + break; + } + // The low part is just a sign extension of the input (which degenerates to // a copy). - Lo = DAG.getNode(ISD::SIGN_EXTEND, NVT, LegalizeOp(Node->getOperand(0))); + Lo = DAG.getNode(ISD::SIGN_EXTEND, NVT, In); // The high part is obtained by SRA'ing all but one of the bits of the lo // part. @@ -1796,7 +1808,19 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){ TLI.getShiftAmountTy())); break; } - case ISD::ZERO_EXTEND: + case ISD::ZERO_EXTEND: { + SDOperand In; + switch (getTypeAction(Node->getOperand(0).getValueType())) { + case Expand: assert(0 && "expand-expand not implemented yet!"); + case Legal: In = LegalizeOp(Node->getOperand(0)); break; + case Promote: + In = PromoteOp(Node->getOperand(0)); + // Emit the appropriate zero_extend_inreg to get the value we want. + In = DAG.getNode(ISD::ZERO_EXTEND_INREG, In.getValueType(), In, + Node->getOperand(0).getValueType()); + break; + } + // The low part is just a zero extension of the input (which degenerates to // a copy). Lo = DAG.getNode(ISD::ZERO_EXTEND, NVT, LegalizeOp(Node->getOperand(0))); @@ -1804,7 +1828,7 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){ // The high part is just a zero. Hi = DAG.getConstant(0, NVT); break; - + } // These operators cannot be expanded directly, emit them as calls to // library functions. case ISD::FP_TO_SINT: |
