First pass at emitIAS for branches and binding labels

src/assembler_ia32.cpp

 //===- subzero/src/assembler_ia32.cpp - Assembler for x86-32  -------------===//
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // Modified by the Subzero authors.
 //
 //===----------------------------------------------------------------------===//
 //
 //                        The Subzero Code Generator
@@ skipping 49 matching lines @@
   StrBuf << "L$" << Ty << "$" << Imm->getPoolEntryID();
   const RelocOffsetT Offset = 0;
   const bool SuppressMangling = true;
   Constant *Sym =
       Ctx->getConstantSym(Ty, Offset, StrBuf.str(), SuppressMangling);
   AssemblerFixup *Fixup = x86::DisplacementRelocation::create(
       Asm, FK_Abs_4, llvm::cast<ConstantRelocatable>(Sym));
   return x86::Address::Absolute(Fixup);
 }
 
+AssemblerX86::~AssemblerX86() {
+#ifndef NDEBUG
+  for (const Label *Label : CfgNodeLabels) {
+    Label->FinalCheck();
+  }
+#endif
+}
+
+Label *AssemblerX86::GetOrCreateCfgNodeLabel(SizeT NodeNumber) {
+  Label *L = nullptr;
+  if (NodeNumber == CfgNodeLabels.size()) {
+    L = new (this->Allocate<Label>()) Label();
+    CfgNodeLabels.push_back(L);
+    return L;
+  }
+  if (NodeNumber > CfgNodeLabels.size()) {
+    CfgNodeLabels.resize(NodeNumber + 1);
+  }
+  L = CfgNodeLabels[NodeNumber];
+  if (!L) {
+    L = new (this->Allocate<Label>()) Label();
+    CfgNodeLabels[NodeNumber] = L;
+  }
+  return L;
+}
+
+void AssemblerX86::BindCfgNodeLabel(SizeT NodeNumber) {
+  Label *L = GetOrCreateCfgNodeLabel(NodeNumber);
+  this->Bind(L);
+}
+
 void AssemblerX86::call(GPRRegister reg) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0xFF);
   EmitRegisterOperand(2, reg);
 }
 
 void AssemblerX86::call(const Address &address) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0xFF);
   EmitOperand(2, address);
@@ skipping 2394 matching lines @@
   assert(shifter == RegX8632::Encoded_Reg_ecx);
   (void)shifter;
   if (Ty == IceType_i16)
     EmitOperandSizeOverride();
   EmitUint8(isByteSizedArithType(Ty) ? 0xD2 : 0xD3);
   EmitOperand(rm, operand);
 }
 
 } // end of namespace x86
 } // end of namespace Ice