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annotate dmd/UshrExp.d @ 135:af1bebfd96a4 dmd2037

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dmd 2.038
author Eldar Insafutdinov <e.insafutdinov@gmail.com>
date Mon, 13 Sep 2010 22:19:42 +0100
parents 60bb0fe4563e
children e3afd1303184
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1 module dmd.UshrExp;
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2
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3 import dmd.common;
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4 import dmd.Expression;
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5 import dmd.Identifier;
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6 import dmd.InterState;
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7 import dmd.Loc;
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8 import dmd.Scope;
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9 import dmd.Id;
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10 import dmd.IntRange;
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11 import dmd.IRState;
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12 import dmd.BinExp;
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13 import dmd.TOK;
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14 import dmd.Type;
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15
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16 import dmd.backend.elem;
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17 import dmd.backend.OPER;
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18 import dmd.backend.TYFL;
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19 import dmd.backend.Util;
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20 import dmd.expression.Util;
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21 import dmd.expression.Ushr;
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22 import dmd.expression.shift_optimize;
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23
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24 class UshrExp : BinExp
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25 {
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26 this(Loc loc, Expression e1, Expression e2)
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27 {
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28 super(loc, TOK.TOKushr, UshrExp.sizeof, e1, e2);
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29 }
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31 override Expression semantic(Scope sc)
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32 {
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33 Expression e;
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34
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35 if (!type)
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36 {
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37 BinExp.semanticp(sc);
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38 e = op_overload(sc);
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39 if (e)
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40 return e;
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41 e1 = e1.checkIntegral();
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42 e2 = e2.checkIntegral();
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43 e1 = e1.integralPromotions(sc);
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44 e2 = e2.castTo(sc, Type.tshiftcnt);
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45 type = e1.type;
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46 }
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47 return this;
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48 }
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49
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50 override Expression optimize(int result)
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51 {
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52 //printf("UshrExp.optimize(result = %d) %s\n", result, toChars());
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53 return shift_optimize(result, this, &Ushr);
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54 }
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56 override Expression interpret(InterState istate)
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57 {
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58 return interpretCommon(istate, &Ushr);
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59 }
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61 override IntRange getIntRange()
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62 {
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63 assert(false);
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64 }
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65
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66 override Identifier opId()
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67 {
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68 return Id.ushr;
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69 }
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71 override Identifier opId_r()
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72 {
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73 return Id.ushr_r;
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74 }
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76 override elem* toElem(IRState* irs)
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77 {
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78 //return toElemBin(irs, OPER.OPshr);
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79 elem *eleft = e1.toElem(irs);
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80 eleft.Ety = touns(eleft.Ety);
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81 elem *eright = e2.toElem(irs);
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82 elem *e = el_bin(OPER.OPshr, type.totym(), eleft, eright);
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83 el_setLoc(e, loc);
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84 return e;
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85 }
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86 }