Generate block labels in the ARM hybrid assembler.

src/IceCfgNode.cpp

 //===- subzero/src/IceCfgNode.cpp - Basic block (node) implementation -----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 1166 matching lines @@
 };
 
 } // end of anonymous namespace
 
 void CfgNode::emitIAS(Cfg *Func) const {
   Func->setCurrentNode(this);
   Assembler *Asm = Func->getAssembler<>();
   // TODO(stichnot): When sandboxing, defer binding the node label until just
   // before the first instruction is emitted, to reduce the chance that a
   // padding nop is a branch target.
-  Asm->bindCfgNodeLabel(getIndex());
+  Asm->bindCfgNodeLabel(this);
   for (const Inst &I : Phis) {
     if (I.isDeleted())
       continue;
     // Emitting a Phi instruction should cause an error.
     I.emitIAS(Func);
   }
 
   // Do the simple emission if not sandboxed.
   if (!Func->getContext()->getFlags().getUseSandboxing()) {
     for (const Inst &I : Insts) {
@@ skipping 194 matching lines @@
   InstIntrinsicCall *Inst = InstIntrinsicCall::create(
       Func, 5, Func->makeVariable(IceType_i64), RMWI64Name, Info->Info);
   Inst->addArg(AtomicRMWOp);
   Inst->addArg(Counter);
   Inst->addArg(One);
   Inst->addArg(OrderAcquireRelease);
   Insts.push_front(Inst);
 }
 
 } // end of namespace Ice