diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index db2b5dd5c68..3861fc35940 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -169,6 +169,7 @@ X86TargetLowering::X86TargetLowering(TargetMachine &TM) setOperationAction(ISD::RET , MVT::Other, Custom); // Darwin ABI issue. setOperationAction(ISD::ConstantPool , MVT::i32 , Custom); + setOperationAction(ISD::JumpTable , MVT::i32 , Custom); setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom); setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom); // 64-bit addm sub, shl, sra, srl (iff 32-bit x86) @@ -2792,8 +2793,8 @@ SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) { return Chain; } - // ConstantPool, GlobalAddress, and ExternalSymbol are lowered as their - // target countpart wrapped in the X86ISD::Wrapper node. Suppose N is + // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as + // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is // one of the above mentioned nodes. It has to be wrapped because otherwise // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only // be used to form addressing mode. These wrapped nodes will be selected @@ -2812,6 +2813,20 @@ SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) { return Result; } + case ISD::JumpTable: { + JumpTableSDNode *JT = cast<JumpTableSDNode>(Op); + SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), + DAG.getTargetJumpTable(JT->getIndex(), + getPointerTy())); + if (Subtarget->isTargetDarwin()) { + // With PIC, the address is actually $g + Offset. + if (getTargetMachine().getRelocationModel() == Reloc::PIC) + Result = DAG.getNode(ISD::ADD, getPointerTy(), + DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()), Result); + } + + return Result; + } case ISD::GlobalAddress: { GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal(); SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), |
