Merging r261387:

[oota-llvm.git] / lib / Target / X86 / X86ISelLowering.cpp

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index c12a3ed43d29759330e729f577a4ebd2e886ca61..dd9966f9e1791a34f7ab4d6eb358ff2529b7ad0a 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -22227,6 +22227,35 @@ X86TargetLowering::EmitLoweredCatchPad(MachineInstr *MI,
   return BB;
 }
 
+MachineBasicBlock *
+X86TargetLowering::EmitLoweredTLSAddr(MachineInstr *MI,
+                                      MachineBasicBlock *BB) const {
+  // So, here we replace TLSADDR with the sequence:
+  // adjust_stackdown -> TLSADDR -> adjust_stackup.
+  // We need this because TLSADDR is lowered into calls
+  // inside MC, therefore without the two markers shrink-wrapping
+  // may push the prologue/epilogue pass them.
+  const TargetInstrInfo &TII = *Subtarget->getInstrInfo();
+  DebugLoc DL = MI->getDebugLoc();
+  MachineFunction &MF = *BB->getParent();
+
+  // Emit CALLSEQ_START right before the instruction.
+  unsigned AdjStackDown = TII.getCallFrameSetupOpcode();
+  MachineInstrBuilder CallseqStart =
+    BuildMI(MF, DL, TII.get(AdjStackDown)).addImm(0);
+  BB->insert(MachineBasicBlock::iterator(MI), CallseqStart);
+
+  // Emit CALLSEQ_END right after the instruction.
+  // We don't call erase from parent because we want to keep the
+  // original instruction around.
+  unsigned AdjStackUp = TII.getCallFrameDestroyOpcode();
+  MachineInstrBuilder CallseqEnd =
+    BuildMI(MF, DL, TII.get(AdjStackUp)).addImm(0).addImm(0);
+  BB->insertAfter(MachineBasicBlock::iterator(MI), CallseqEnd);
+
+  return BB;
+}
+
 MachineBasicBlock *
 X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI,
                                       MachineBasicBlock *BB) const {
@@ -22607,6 +22636,11 @@ X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
   case X86::TCRETURNri64:
   case X86::TCRETURNmi64:
     return BB;
+  case X86::TLS_addr32:
+  case X86::TLS_addr64:
+  case X86::TLS_base_addr32:
+  case X86::TLS_base_addr64:
+    return EmitLoweredTLSAddr(MI, BB);
   case X86::WIN_ALLOCA:
     return EmitLoweredWinAlloca(MI, BB);
   case X86::CATCHRET: