Add DMB instruction to the ARM integrated assembler.

src/IceInstARM32.cpp

 //===- subzero/src/IceInstARM32.cpp - ARM32 instruction implementation ----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 1692 matching lines @@
   if (!BuildDefs::dump())
     return;
   Ostream &Str = Func->getContext()->getStrEmit();
   assert(getSrcSize() == 0);
   Str << "\t"
          "dmb"
          "\t"
          "sy";
 }
 
+void InstARM32Dmb::emitIAS(const Cfg *Func) const {
+  assert(getSrcSize() == 0);
+  auto *Asm = Func->getAssembler<ARM32::AssemblerARM32>();
+  constexpr ARM32::IValueT SyOption = 0xF; // i.e. 1111
+  Asm->dmb(SyOption);
+  if (Asm->needsTextFixup())
+    emitUsingTextFixup(Func);
+}
+
 void InstARM32Dmb::dump(const Cfg *Func) const {
   if (!BuildDefs::dump())
     return;
   Func->getContext()->getStrDump() << "dmb\tsy";
 }
 
 void OperandARM32Mem::emit(const Cfg *Func) const {
   if (!BuildDefs::dump())
     return;
   Ostream &Str = Func->getContext()->getStrEmit();
@@ skipping 218 matching lines @@
 template class InstARM32UnaryopFP<InstARM32::Vsqrt>;
 
 template class InstARM32FourAddrGPR<InstARM32::Mla>;
 template class InstARM32FourAddrGPR<InstARM32::Mls>;
 
 template class InstARM32CmpLike<InstARM32::Cmn>;
 template class InstARM32CmpLike<InstARM32::Cmp>;
 template class InstARM32CmpLike<InstARM32::Tst>;
 
 } // end of namespace Ice