Initial skeleton of Subzero.

src/IceOperand.cpp

Index: src/IceOperand.cpp
diff --git a/src/IceOperand.cpp b/src/IceOperand.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..38cd21b6db37361965c8e31e68a8e1a1eb492f15
--- /dev/null
+++ b/src/IceOperand.cpp
@@ -0,0 +1,82 @@
+//===- subzero/src/IceOperand.cpp - High-level operand implementation -----===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the IceOperand class and its
+// target-independent subclasses, primarily for the methods of the
+// IceVariable class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "IceCfg.h"
+#include "IceInst.h"
+#include "IceOperand.h"
+
+void IceVariable::setUse(const IceInst *Inst, const IceCfgNode *Node) {
+  if (DefNode == NULL)
+    return;
+  if (llvm::isa<IceInstPhi>(Inst) || Node != DefNode)
+    DefNode = NULL;
+}
+
+void IceVariable::setDefinition(IceInst *Inst, const IceCfgNode *Node) {
+  if (DefNode == NULL)
+    return;
+  // Can first check preexisting DefInst if we care about multi-def vars.
+  DefInst = Inst;
+  if (Node != DefNode)
+    DefNode = NULL;
+}
+
+void IceVariable::replaceDefinition(IceInst *Inst, const IceCfgNode *Node) {
+  DefInst = NULL;
+  setDefinition(Inst, Node);
+}
+
+void IceVariable::setIsArg(IceCfg *Cfg) {
+  IsArgument = true;
+  if (DefNode == NULL)
+    return;
+  IceCfgNode *Entry = Cfg->getEntryNode();
+  if (DefNode == Entry)
+    return;
+  DefNode = NULL;
+}
+
+IceString IceVariable::getName() const {
+  if (Name != "")
+    return Name;
+  char buf[30];
+  sprintf(buf, "__%u", getIndex());
+  return buf;
+}
+
+// ======================== dump routines ======================== //
+
+IceOstream &operator<<(IceOstream &Str, const IceOperand *O) {
+  if (O)
+    O->dump(Str);
+  else
+    Str << "<NULL>";
+  return Str;
+}
+
+void IceVariable::dump(IceOstream &Str) const {
+  const IceCfgNode *CurrentNode = Str.getCurrentNode();
+  (void)CurrentNode; // used only in assert()
+  assert(CurrentNode == NULL || DefNode == NULL || DefNode == CurrentNode);
+  Str << "%" << getName();
+}
+
+void IceOperand::dump(IceOstream &Str) const { Str << "IceOperand<?>"; }
+
+void IceConstantRelocatable::dump(IceOstream &Str) const {
+  Str << "@" << Name;
+  if (Offset)
+    Str << "+" << Offset;
+}