Esempio n. 1
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 /**
  * Insert an instruction before instruction (handle) ih contained in this list.
  *
  * @param ih where to insert to the instruction list
  * @param i Instruction to insert
  * @return instruction handle of the first inserted instruction
  */
 public BranchHandle insert(InstructionHandle ih, BranchInstruction i) {
   BranchHandle bh = BranchHandle.getBranchHandle(i);
   InstructionList il = new InstructionList();
   il.append(bh);
   insert(ih, il);
   return bh;
 }
Esempio n. 2
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 /**
  * Insert another list.
  *
  * @param il list to insert before start of this list
  * @return instruction handle of the first inserted instruction
  */
 public InstructionHandle insert(InstructionList il) {
   if (isEmpty()) {
     append(il); // Code is identical for this case
     return start;
   } else {
     return insert(start, il);
   }
 }
Esempio n. 3
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 /** @return complete, i.e., deep copy of this list */
 public InstructionList copy() {
   Map<InstructionHandle, InstructionHandle> map =
       new HashMap<InstructionHandle, InstructionHandle>();
   InstructionList il = new InstructionList();
   /* Pass 1: Make copies of all instructions, append them to the new list
    * and associate old instruction references with the new ones, i.e.,
    * a 1:1 mapping.
    */
   for (InstructionHandle ih = start; ih != null; ih = ih.next) {
     Instruction i = ih.instruction;
     Instruction c = i.copy(); // Use clone for shallow copy
     if (c instanceof BranchInstruction) {
       map.put(ih, il.append((BranchInstruction) c));
     } else {
       map.put(ih, il.append(c));
     }
   }
   /* Pass 2: Update branch targets.
    */
   InstructionHandle ih = start;
   InstructionHandle ch = il.start;
   while (ih != null) {
     Instruction i = ih.instruction;
     Instruction c = ch.instruction;
     if (i instanceof BranchInstruction) {
       BranchInstruction bi = (BranchInstruction) i;
       BranchInstruction bc = (BranchInstruction) c;
       InstructionHandle itarget = bi.getTarget(); // old target
       // New target is in hash map
       bc.setTarget(map.get(itarget));
       if (bi instanceof Select) { // Either LOOKUPSWITCH or TABLESWITCH
         InstructionHandle[] itargets = ((Select) bi).getTargets();
         InstructionHandle[] ctargets = ((Select) bc).getTargets();
         for (int j = 0; j < itargets.length; j++) { // Update all targets
           ctargets[j] = map.get(itargets[j]);
         }
       }
     }
     ih = ih.next;
     ch = ch.next;
   }
   return il;
 }
Esempio n. 4
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 /**
  * Initialize list with (nonnull) compound instruction. Consumes argument list, i.e., it becomes
  * empty.
  *
  * @param c compound instruction (list)
  */
 public InstructionList(CompoundInstruction c) {
   append(c.getInstructionList());
 }
Esempio n. 5
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 /**
  * Create instruction list containing one instruction.
  *
  * @param i initial instruction
  */
 public InstructionList(BranchInstruction i) {
   append(i);
 }
Esempio n. 6
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 /**
  * Create instruction list containing one instruction.
  *
  * @param i initial instruction
  */
 public InstructionList(Instruction i) {
   append(i);
 }
Esempio n. 7
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 /**
  * Append a branch instruction to the end of this list.
  *
  * @param i branch instruction to append
  * @return branch instruction handle of the appended instruction
  */
 public BranchHandle append(BranchInstruction i) {
   BranchHandle ih = BranchHandle.getBranchHandle(i);
   append(ih);
   return ih;
 }
Esempio n. 8
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 /**
  * Append an instruction to the end of this list.
  *
  * @param i instruction to append
  * @return instruction handle of the appended instruction
  */
 public InstructionHandle append(Instruction i) {
   InstructionHandle ih = InstructionHandle.getInstructionHandle(i);
   append(ih);
   return ih;
 }