Initial skeleton of Subzero.

src/IceOperand.cpp

+//===- 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 Operand class and its
+// target-independent subclasses, primarily for the methods of the
+// Variable class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "IceCfg.h"
+#include "IceInst.h"
+#include "IceOperand.h"
+
+namespace Ice {
+
+void Variable::setUse(const Inst *Inst, const CfgNode *Node) {
+  if (DefNode == NULL)
+    return;
+  if (llvm::isa<InstPhi>(Inst) || Node != DefNode)
+    DefNode = NULL;
+}
+
+void Variable::setDefinition(Inst *Inst, const CfgNode *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 Variable::replaceDefinition(Inst *Inst, const CfgNode *Node) {
+  DefInst = NULL;
+  setDefinition(Inst, Node);
+}
+
+void Variable::setIsArg(IceCfg *Cfg) {
+  IsArgument = true;
+  if (DefNode == NULL)
+    return;
+  CfgNode *Entry = Cfg->getEntryNode();
+  if (DefNode == Entry)
+    return;
+  DefNode = NULL;
+}
+
+IceString Variable::getName() const {
+  if (Name != "")
+    return Name;
+  const static size_t BufLen = 30;
+  char buf[BufLen];
+  snprintf(buf, BufLen, "__%u", getIndex());
+  return buf;
+}
+
+// ======================== dump routines ======================== //
+
+void Variable::dump(const IceCfg *Cfg) const {
+  IceOstream &Str = Cfg->getContext()->getStrDump();
+  const CfgNode *CurrentNode = Cfg->getCurrentNode();
+  (void)CurrentNode; // used only in assert()
+  assert(CurrentNode == NULL || DefNode == NULL || DefNode == CurrentNode);
+  Str << "%" << getName();
+}
+
+void Operand::dump(const IceCfg *Cfg) const {
+  IceOstream &Str = Cfg->getContext()->getStrDump();
+  Str << "Operand<?>";
+}
+
+void ConstantRelocatable::dump(const IceCfg *Cfg) const {
+  IceOstream &Str = Cfg->getContext()->getStrDump();
+  Str << "@" << Name;
+  if (Offset)
+    Str << "+" << Offset;
+}
+
+} // end of namespace Ice