Lower TLS_addr32 and TLS_addr64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120225 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 41 insertions, 0 deletions

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 6793b70..91768d4 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -9923,6 +9923,44 @@ X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI,
 }
 
 MachineBasicBlock *
+X86TargetLowering::emitLoweredTLSAddr(MachineInstr *MI,
+                                      MachineBasicBlock *BB) const {
+  const X86InstrInfo *TII
+    = static_cast<const X86InstrInfo*>(getTargetMachine().getInstrInfo());
+  DebugLoc DL = MI->getDebugLoc();
+  if (Subtarget->is64Bit()) {
+    BuildMI(*BB, MI, DL, TII->get(X86::DATA16_PREFIX));
+    MachineInstrBuilder MIB = BuildMI(*BB, MI, DL, TII->get(X86::LEA64r),
+                                      X86::RDI);
+    X86AddressMode Addr;
+    Addr.GV = MI->getOperand(3).getGlobal();
+    Addr.GVOpFlags = MI->getOperand(3).getTargetFlags();
+    Addr.Base.Reg = X86::RIP;
+    addFullAddress(MIB, Addr);
+    BuildMI(*BB, MI, DL, TII->get(X86::DATA16_PREFIX));
+    BuildMI(*BB, MI, DL, TII->get(X86::DATA16_PREFIX));
+    BuildMI(*BB, MI, DL, TII->get(X86::REX64_PREFIX));
+    BuildMI(*BB, MI, DL, TII->get(X86::CALL64pcrel32))
+      .addExternalSymbol("__tls_get_addr",  X86II::MO_PLT)
+      .addReg(X86::RDI, RegState::Implicit);
+  } else {
+    MachineInstrBuilder MIB = BuildMI(*BB, MI, DL, TII->get(X86::LEA32r),
+                                      X86::EAX);
+    X86AddressMode Addr;
+    Addr.GV = MI->getOperand(3).getGlobal();
+    Addr.GVOpFlags = MI->getOperand(3).getTargetFlags();
+    Addr.IndexReg = X86::EBX;
+    addFullAddress(MIB, Addr);
+    BuildMI(*BB, MI, DL, TII->get(X86::CALLpcrel32))
+      .addExternalSymbol("___tls_get_addr",  X86II::MO_PLT)
+      .addReg(X86::EAX, RegState::Implicit);
+  }
+
+  MI->eraseFromParent(); // The pseudo instruction is gone now.
+  return BB;
+}
+
+MachineBasicBlock *
 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
                                                MachineBasicBlock *BB) const {
   switch (MI->getOpcode()) {
@@ -9932,6 +9970,9 @@ X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
   case X86::TLSCall_32:
   case X86::TLSCall_64:
     return EmitLoweredTLSCall(MI, BB);
+  case X86::TLS_addr32:
+  case X86::TLS_addr64:
+    return emitLoweredTLSAddr(MI, BB);
   case X86::CMOV_GR8:
   case X86::CMOV_FR32:
   case X86::CMOV_FR64: