Package org.xmlvm.refcount

Examples of org.xmlvm.refcount.RegisterSet

48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
  @SuppressWarnings("unchecked")
  public ReturnValue Process(List<CodePath> allCodePaths, Map<Element, InstructionActions> beenTo, Element codeElement) throws ReferenceCountingException, DataConversionException
  {
    ReturnValue toRet= new ReturnValue();
    // We want to identify all registers used.
    RegisterSet allRegs= new RegisterSet();
    for (CodePath curPath : allCodePaths)
    {
      for (OnePathInstructionRegisterContents curInst : curPath.path)
      {
        InstructionUseInfo useInfo= beenTo.get(curInst.instruction).useInfo;
        allRegs.orEq(useInfo.allWrites());
        allRegs.orEq(useInfo.usedReg());
      }
    }

    // Emit decl for each register
    for (int regId : allRegs)
    {
      Element initElem= new Element(InstructionProcessor.cmd_define_register, InstructionProcessor.vm);
      initElem.setAttribute("vartype", InstructionProcessor.cmd_define_register_attr_register);
      initElem.setAttribute("num", regId + "");
      toRet.functionInit.add(initElem);
    }

    // Find all the var elements, and add moves for them
    int argIdx= 1;
    for (Element curElem : (List<Element>) codeElement.getChildren())
    {
      if (curElem.getName().equals("var"))
      {
        Element moveArg= new Element(InstructionProcessor.cmd_move_argument, InstructionProcessor.vm);
        moveArg.setAttribute("vx", curElem.getAttributeValue("register"));
        moveArg.setAttribute("vx-type", curElem.getAttributeValue("type"));

        String sourceName= curElem.getAttributeValue("name");
        if (sourceName == "this")
        {
          moveArg.setAttribute("sourceArg", "self");
        }
        else
        {
          moveArg.setAttribute("sourceArg", argIdx + "");
          argIdx++;
        }
        toRet.functionInit.add(moveArg);
        allRegs.remove(curElem.getAttribute("register").getIntValue());

      }
    }

    RegisterSet hasObj= RegisterSet.none();
    for (CodePath curPath : allCodePaths)
    {
      // collect non obj writes
      for (OnePathInstructionRegisterContents curInst : curPath.path)
      {
        InstructionUseInfo useInfo= beenTo.get(curInst.instruction).useInfo;
        hasObj.orEq(useInfo.writesObj());
      }
    }

    allRegs.andEq(hasObj);
View Full Code Here
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
  {
    ReturnValue toRet= new ReturnValue();

    for (CodePath c : allCodePaths)
    {
      RegisterSet allRegs= new RegisterSet();
      for (OnePathInstructionRegisterContents curInst : c.path)
      {
        InstructionUseInfo useInfo= beenTo.get(curInst.instruction).useInfo;
        allRegs.orEq(useInfo.allWrites());
        allRegs.orEq(useInfo.usedReg());
      }

      // Look for a retain, no writes, then a release, and then get
      // rid of the symmetric retain / release

      for (int reg : allRegs)
      {
        List<PairUseInfoIndex> retains= new ArrayList<PairUseInfoIndex>();
        List<PairUseInfoIndex> releases= new ArrayList<PairUseInfoIndex>();

        int curIndex= 5;
        for (OnePathInstructionRegisterContents curInst : c.path)
        {
          InstructionActions act;
          act= beenTo.get(curInst.instruction);

          // changing the order of the next three ifs will screw
          // everything
          // up in unclear ways until you look at the output
          if (act.useInfo.willFree.has(reg))
          {
            releases.add(new PairUseInfoIndex(act.useInfo, curIndex));
            curIndex++;
          }

          RegisterSet allWrites= act.useInfo.allWrites();
          if (allWrites.has(reg))
          {
            eliminateExcessRetains(reg, retains, releases);
          }

          if (act.useInfo.requiresRetain.has(reg))
View Full Code Here
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
  public ReturnValue Process(List<CodePath> allCodePaths, Map<Element, InstructionActions> beenTo, Element codeElement) throws ReferenceCountingException, DataConversionException
  {

    ReturnValue toRet= new ReturnValue();

    RegisterSet allRegs= new RegisterSet();
    for (CodePath curPath : allCodePaths)
    {
      for (OnePathInstructionRegisterContents curInst : curPath.path)
      {
        InstructionUseInfo useInfo= beenTo.get(curInst.instruction).useInfo;
        allRegs.orEq(useInfo.allWrites());
        allRegs.orEq(useInfo.usedReg());
      }
    }

    for (CodePath c : allCodePaths)
    {
      // We start with as early as possible nulls. Now we switch to
      // as late as possible to prevent excess nulling
      RegisterSet needsNull= RegisterSet.none();
      InstructionActions act= null;
      OnePathInstructionRegisterContents last= null;
      for (OnePathInstructionRegisterContents curInst : c.path)
      {
        last= curInst;
        act= beenTo.get(curInst.instruction);
        needsNull.orEq(act.useInfo.willNull);
        act.useInfo.willNull= RegisterSet.none();
        needsNull.andEqNot(act.useInfo.allWrites());
      }
      if (act != null)
      {
        if (last.instruction.getName().startsWith("return"))
        {
View Full Code Here
TOP

Related Classes of org.xmlvm.refcount.RegisterSet

  • org.xmlvm.refcount.optimizations.DeferredNullingOptimization
  • org.xmlvm.refcount.optimizations.ExcessRetainsOptimization
  • org.xmlvm.refcount.optimizations.RegisterSizeAndNullingOptimization
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.