[RISCV] Add lowering of global TLS addresses
This patch adds lowering for global TLS addresses for the TLS models of
InitialExec, GlobalDynamic, LocalExec and LocalDynamic.
LocalExec support required using a 4-operand add instruction, which uses
the fourth operand to express a relocation on the symbol. The necessary
fixup is emitted when the instruction is emitted.
Differential Revision: https://reviews.llvm.org/D55305
llvm-svn: 363771
diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.h b/llvm/lib/Target/RISCV/RISCVISelLowering.h
index 7f261b4..71dab90 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.h
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.h
@@ -159,10 +159,15 @@
template <class NodeTy>
SDValue getAddr(NodeTy *N, SelectionDAG &DAG, bool IsLocal = true) const;
+ SDValue getStaticTLSAddr(GlobalAddressSDNode *N, SelectionDAG &DAG,
+ bool UseGOT) const;
+ SDValue getDynamicTLSAddr(GlobalAddressSDNode *N, SelectionDAG &DAG) const;
+
bool shouldConsiderGEPOffsetSplit() const override { return true; }
SDValue lowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerBlockAddress(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
+ SDValue lowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerSELECT(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerVASTART(SDValue Op, SelectionDAG &DAG) const;
SDValue lowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const;