Add a few Subzero intrinsics (not the atomic ones yet).

src/IceInstX8632.cpp

Index: src/IceInstX8632.cpp
diff --git a/src/IceInstX8632.cpp b/src/IceInstX8632.cpp
index 5d3f01ba2834bfd35ddb5cb0040a63690675d7ef..592725f2a564a73fabb14118be155cc4a984d6b9 100644
--- a/src/IceInstX8632.cpp
+++ b/src/IceInstX8632.cpp
@@ -50,6 +50,15 @@ const struct TypeX8632Attributes_ {
 const size_t TypeX8632AttributesSize =
     llvm::array_lengthof(TypeX8632Attributes);
 
+const char *InstX8632SegmentRegNames[] = {
+#define X(val, name)                            \
+  name,
+    SEG_REGX8632_TABLE
+#undef X
+};
+const size_t InstX8632SegmentRegNamesSize =
+    llvm::array_lengthof(InstX8632SegmentRegNames);
+
 } // end of anonymous namespace
 
 const char *InstX8632::getWidthString(Type Ty) {
@@ -148,6 +157,10 @@ InstX8632Ucomiss::InstX8632Ucomiss(Cfg *Func, Operand *Src0, Operand *Src1)
   addSource(Src1);
 }
 
+InstX8632UD2::InstX8632UD2(Cfg *Func)
+    : InstX8632(Func, InstX8632::UD2, 0, NULL) {
+}
+
 InstX8632Test::InstX8632Test(Cfg *Func, Operand *Src1, Operand *Src2)
     : InstX8632(Func, InstX8632::Test, 2, NULL) {
   addSource(Src1);
@@ -525,6 +538,17 @@ void InstX8632Ucomiss::dump(const Cfg *Func) const {
   dumpSources(Func);
 }
 
+void InstX8632UD2::emit(const Cfg *Func) const {
+  Ostream &Str = Func->getContext()->getStrEmit();
+  assert(getSrcSize() == 0);
+  Str << "\tud2\n";
+}
+
+void InstX8632UD2::dump(const Cfg *Func) const {
+  Ostream &Str = Func->getContext()->getStrDump();
+  Str << "ud2\n";
+}
+
 void InstX8632Test::emit(const Cfg *Func) const {
   Ostream &Str = Func->getContext()->getStrEmit();
   assert(getSrcSize() == 2);
@@ -826,6 +850,26 @@ void OperandX8632Mem::dump(const Cfg *Func) const {
   Str << "]";
 }
 
+void OperandX8632MemOffSeg::emit(const Cfg *Func) const {
+  Ostream &Str = Func->getContext()->getStrEmit();
+  Str << TypeX8632Attributes[getType()].WidthString << " ";
+  assert(SegmentReg < InstX8632SegmentRegNamesSize);
+  Str << InstX8632SegmentRegNames[SegmentReg] << ":";
+  int64_t OffVal = 0;
+  if (ConstantInteger *CI = llvm::dyn_cast<ConstantInteger>(Offset)) {
+    OffVal = CI->getValue();
+  } else {
+    assert (Offset == NULL && "Offset should be NULL or ConstantInteger");
+    OffVal = 0;
+  }
+  Str << "[" << OffVal << "]";
+}
+
+void OperandX8632MemOffSeg::dump(const Cfg *Func) const {
+  // Same as emit for now.
+  emit(Func);
+}
+
 void VariableSplit::emit(const Cfg *Func) const {
   Ostream &Str = Func->getContext()->getStrEmit();
   assert(Var->getLocalUseNode() == NULL ||