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C++ ConstantExpr::getWidth方法代码示例

本文整理汇总了C++中ConstantExpr::getWidth方法的典型用法代码示例。如果您正苦于以下问题：C++ ConstantExpr::getWidth方法的具体用法？C++ ConstantExpr::getWidth怎么用？C++ ConstantExpr::getWidth使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ConstantExpr的用法示例。


在下文中一共展示了ConstantExpr::getWidth方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: getOrMakeExpr

z3::expr Z3Builder::makeExpr(ref<Expr> e) {
    ++stats::queryConstructs;

    switch (e->getKind()) {
    case Expr::Constant: {
        ConstantExpr *CE = cast<ConstantExpr>(e);
        unsigned width = CE->getWidth();
        if (width == 1)
            return context_.bool_val(CE->isTrue());
        if (width <= 64)
            return context_.bv_val((__uint64)CE->getZExtValue(), width);

        // This is slower than concatenating 64-bit extractions, like STPBuilder
        // does, but the assumption is that it's quite infrequent.
        // TODO: Log these transformations.
        llvm::SmallString<32> const_repr;
        CE->getAPValue().toStringUnsigned(const_repr, 10);
        return context_.bv_val(const_repr.c_str(), width);
    }

    case Expr::NotOptimized: {
        NotOptimizedExpr *noe = cast<NotOptimizedExpr>(e);
        return getOrMakeExpr(noe->src);
    }

    case Expr::Read: {
        return makeReadExpr(cast<ReadExpr>(e));
    }

    case Expr::Select: {
        SelectExpr *se = cast<SelectExpr>(e);
        // XXX: A bug in Clang prevents us from using z3::ite
        return z3::to_expr(context_, Z3_mk_ite(context_,
                getOrMakeExpr(se->cond),
                getOrMakeExpr(se->trueExpr),
                getOrMakeExpr(se->falseExpr)));
    }

    case Expr::Concat: {
        ConcatExpr *ce = cast<ConcatExpr>(e);

        unsigned numKids = ce->getNumKids();
        z3::expr res = getOrMakeExpr(ce->getKid(numKids-1));
        for (int i = numKids - 2; i >= 0; --i) {
            res = z3::to_expr(context_,
                    Z3_mk_concat(context_, getOrMakeExpr(ce->getKid(i)), res));
        }
        return res;
    }

    case Expr::Extract: {
        ExtractExpr *ee = cast<ExtractExpr>(e);

        z3::expr src = getOrMakeExpr(ee->expr);
        if (ee->getWidth() == 1) {
            return z3::to_expr(context_, Z3_mk_extract(context_,
                    ee->offset, ee->offset, src)) == context_.bv_val(1, 1);
        } else {
            return z3::to_expr(context_, Z3_mk_extract(context_,
                    ee->offset + ee->getWidth() - 1, ee->offset, src));
        }
    }

    // Casting

    case Expr::ZExt: {
        CastExpr *ce = cast<CastExpr>(e);

        z3::expr src = getOrMakeExpr(ce->src);
        if (src.is_bool()) {
            // XXX: A bug in Clang prevents us from using z3::ite
            return z3::to_expr(context_, Z3_mk_ite(context_,
                    src,
                    context_.bv_val(1, ce->getWidth()),
                    context_.bv_val(0, ce->getWidth())));
        } else {
            return z3::to_expr(context_, Z3_mk_zero_ext(context_,
                    ce->getWidth() - src.get_sort().bv_size(), src));
        }
    }

    case Expr::SExt: {
        CastExpr *ce = cast<CastExpr>(e);

        z3::expr src = getOrMakeExpr(ce->src);
        if (src.is_bool()) {
            return z3::to_expr(context_, Z3_mk_ite(context_,
                    src,
                    context_.bv_val(1, ce->getWidth()),
                    context_.bv_val(0, ce->getWidth())));
        } else {
            return z3::to_expr(context_, Z3_mk_sign_ext(context_,
                    ce->getWidth() - src.get_sort().bv_size(), src));
        }
    }

    // Arithmetic

    case Expr::Add: {
        AddExpr *ae = cast<AddExpr>(e);
//.........这里部分代码省略.........
开发者ID:AmesianX，项目名称:chef，代码行数:101，代码来源:Z3Builder.cpp

示例2: resValue

z3::expr KQuery2Z3::eachExprToZ3(ref<Expr> &ele) {
	z3::expr res = z3_ctx.bool_val(true);

	switch (ele->getKind()) {

	case Expr::Constant: {
		ConstantExpr *ce = cast<ConstantExpr>(ele);
		Expr::Width width = ce->getWidth();

		if (ele.get()->isFloat) {
			//float point number
			//in z3 there is no difference between float and double
			//they are all real value.
			double temp = 1.0;
			if (width == 32) {
				llvm::APFloat resValue(llvm::APFloat::IEEEsingle,
						ce->getAPValue());
				temp = resValue.convertToFloat(); //the real float number,how to establish expr of z3
			} else if (width == 64) {
				llvm::APFloat resValue(llvm::APFloat::IEEEdouble,
						ce->getAPValue());
				temp = resValue.convertToDouble(); // the real double number.
			}
			Fraction frac;
			getFraction(temp, frac);
//			std::stringstream ss;
//			ss << temp;
//				std::cerr << "frac.num = " << frac.num << " "
//						<< "frac.den = " << frac.den << std::endl;
//			res = z3_ctx.real_val(ss.str().c_str());
			res = z3_ctx.real_val(frac.num, frac.den);
//				std::cerr << "float point value = " << res << std::endl;
		} else {
			if (width == Expr::Bool) {
				if (ce->isTrue()) {
					//that is true
					res = z3_ctx.bool_val(true);
				} else {
					//that is false
					res = z3_ctx.bool_val(false);
				}
			} else if (width != Expr::Fl80) {
				int temp = ce->getZExtValue();
//					std::cerr << "temp = " << temp << std::endl;
#if INT_ARITHMETIC
				res = z3_ctx.int_val(temp);
#else
				res = z3_ctx.bv_val(temp, BIT_WIDTH);
#endif

//	     			std::cerr << res;
			} else {
				assert(0 && "The Fl80 out, value bit number extends 64");
			}
		}
		return res;
	}

	case Expr::NotOptimized: {
		assert(0 && "don't handle NotOptimized expression");
		return res;
	}

	case Expr::Read: {
		//type char
		ReadExpr *re = cast<ReadExpr>(ele);
		assert(re && re->updates.root);
		const std::string varName = re->updates.root->name;
		if (re->getWidth() == Expr::Bool) {
			res = z3_ctx.bool_const(varName.c_str());
		} else {
#if INT_ARITHMETIC
				res = z3_ctx.constant(varName.c_str(), z3_ctx.int_sort());
#else
				res = z3_ctx.constant(varName.c_str(), z3_ctx.bv_sort(BIT_WIDTH));
#endif

		}
		return res;
	}

	case Expr::Select: {
		SelectExpr *se = cast<SelectExpr>(ele);

		z3::expr cond = eachExprToZ3(se->cond);
		z3::expr tExpr = eachExprToZ3(se->trueExpr);
		z3::expr fExpr = eachExprToZ3(se->falseExpr);

		res = z3::ite(cond, tExpr, fExpr);
		return res;
	}

	case Expr::Concat: {
		ConcatExpr *ce = cast<ConcatExpr>(ele);
		ReadExpr *re = NULL;
		if (ce->getKid(0)->getKind() == Expr::Read)
			re = cast<ReadExpr>(ce->getKid(0));
		else if (ce->getKid(1)->getKind() == Expr::Read)
			re = cast<ReadExpr>(ce->getKid(1));
		else if (ce->getKid(1)->getKind() == Expr::Concat){
//.........这里部分代码省略.........
开发者ID:xjtuSoftware，项目名称:inputGen，代码行数:101，代码来源:KQuery2Z3.cpp

示例3: constructActual

/** if *et_out==etBV then result is a bitvector,
    otherwise it is a bool */
ExprHandle STPBuilder::constructActual(ref<Expr> e, int *width_out, STPExprType *et_out) {
  int width;
  if (!width_out) width_out = &width;

  ++stats::queryConstructs;

  switch (e->getKind()) {
  case Expr::Constant: {
    ConstantExpr *CE = cast<ConstantExpr>(e);
    *width_out = CE->getWidth();

    // Coerce to bool if necessary.
    if (*width_out == 1 && (*et_out == etBOOL || *et_out == etDontCare)) {
      *et_out = etBOOL;
      return CE->isTrue() ? getTrue() : getFalse();
    }

    *et_out = etBV;

    // Fast path.
    if (*width_out <= 32)
      return bvConst32(*width_out, CE->getZExtValue(32));
    if (*width_out <= 64)
      return bvConst64(*width_out, CE->getZExtValue());

    ref<ConstantExpr> Tmp = CE;
    ExprHandle Res = bvConst64(64, Tmp->Extract(0, 64)->getZExtValue());
    while (Tmp->getWidth() > 64) {
      Tmp = Tmp->Extract(64, Tmp->getWidth()-64);
      unsigned Width = std::min(64U, Tmp->getWidth());
      Res = vc_bvConcatExpr(vc, bvConst64(Width,
                                        Tmp->Extract(0, Width)->getZExtValue()),
                            Res);
    }
    return Res;
  }
    
  // Special
  case Expr::NotOptimized: {
    NotOptimizedExpr *noe = cast<NotOptimizedExpr>(e);
    return construct(noe->src, width_out, et_out);
  }

  case Expr::Read: {
    ReadExpr *re = cast<ReadExpr>(e);
    *width_out = 8;
    *et_out = etBV;
    return vc_readExpr(vc,
                       getArrayForUpdate(re->updates.root, re->updates.head),
                       construct(re->index, 0, etBV));
  }
    
  case Expr::Select: {
    SelectExpr *se = cast<SelectExpr>(e);
    ExprHandle cond = construct(se->cond, 0, etBOOL);
    ExprHandle tExpr = construct(se->trueExpr, width_out, etBV);
    ExprHandle fExpr = construct(se->falseExpr, width_out, etBV);
    *et_out = etBV;
    return vc_iteExpr(vc, cond, tExpr, fExpr);
  }

  case Expr::Concat: {
    ConcatExpr *ce = cast<ConcatExpr>(e);
    unsigned numKids = ce->getNumKids();
    ExprHandle res = construct(ce->getKid(numKids-1), 0, etBV);
    for (int i=numKids-2; i>=0; i--) {
      res = vc_bvConcatExpr(vc, construct(ce->getKid(i), 0, etBV), res);
    }
    *width_out = ce->getWidth();
    *et_out = etBV;
    return res;
  }

  case Expr::Extract: {
    ExtractExpr *ee = cast<ExtractExpr>(e);
    ExprHandle src = construct(ee->expr, width_out, etBV);    
    *width_out = ee->getWidth();
    *et_out = etBV;
    return vc_bvExtract(vc, src, ee->offset + *width_out - 1, ee->offset);
  }

    // Casting

  case Expr::ZExt: {
    int srcWidth;
    CastExpr *ce = cast<CastExpr>(e);
    STPExprType src_rt = etDontCare;
    ExprHandle src = construct(ce->src, &srcWidth, &src_rt);
    *width_out = ce->getWidth();
    *et_out = etBV;
    if (src_rt==etBOOL) {
      return vc_iteExpr(vc, src, bvOne(*width_out), bvZero(*width_out));
    } else {
      return vc_bvConcatExpr(vc, bvZero(*width_out-srcWidth), src);
    }
  }

  case Expr::SExt: {
//.........这里部分代码省略.........
开发者ID:delcypher，项目名称:klee-cl，代码行数:101，代码来源:STPBuilder.cpp

示例4: constructActual

/** if *width_out!=1 then result is a bitvector,
    otherwise it is a bool */
ExprHandle STPBuilder::constructActual(ref<Expr> e, int *width_out) {
    int width;
    if (!width_out) width_out = &width;

    ++stats::queryConstructs;

    switch (e->getKind()) {
    case Expr::Constant: {
        ConstantExpr *CE = cast<ConstantExpr>(e);
        *width_out = CE->getWidth();

        // Coerce to bool if necessary.
        if (*width_out == 1)
            return CE->isTrue() ? getTrue() : getFalse();

        // Fast path.
        if (*width_out <= 32)
            return bvConst32(*width_out, CE->getZExtValue(32));
        if (*width_out <= 64)
            return bvConst64(*width_out, CE->getZExtValue());

        ref<ConstantExpr> Tmp = CE;
        ExprHandle Res = bvConst64(64, Tmp->Extract(0, 64)->getZExtValue());
        while (Tmp->getWidth() > 64) {
            Tmp = Tmp->Extract(64, Tmp->getWidth()-64);
            unsigned Width = std::min(64U, Tmp->getWidth());
            Res = vc_bvConcatExpr(vc, bvConst64(Width,
                                                Tmp->Extract(0, Width)->getZExtValue()),
                                  Res);
        }
        return Res;
    }

    // Special
    case Expr::NotOptimized: {
        NotOptimizedExpr *noe = cast<NotOptimizedExpr>(e);
        return construct(noe->src, width_out);
    }

    case Expr::Read: {
        ReadExpr *re = cast<ReadExpr>(e);
        assert(re && re->updates.root);
        *width_out = re->updates.root->getRange();
        return vc_readExpr(vc,
                           getArrayForUpdate(re->updates.root, re->updates.head),
                           construct(re->index, 0));
    }

    case Expr::Select: {
        SelectExpr *se = cast<SelectExpr>(e);
        ExprHandle cond = construct(se->cond, 0);
        ExprHandle tExpr = construct(se->trueExpr, width_out);
        ExprHandle fExpr = construct(se->falseExpr, width_out);
        return vc_iteExpr(vc, cond, tExpr, fExpr);
    }

    case Expr::Concat: {
        ConcatExpr *ce = cast<ConcatExpr>(e);
        unsigned numKids = ce->getNumKids();
        ExprHandle res = construct(ce->getKid(numKids-1), 0);
        for (int i=numKids-2; i>=0; i--) {
            res = vc_bvConcatExpr(vc, construct(ce->getKid(i), 0), res);
        }
        *width_out = ce->getWidth();
        return res;
    }

    case Expr::Extract: {
        ExtractExpr *ee = cast<ExtractExpr>(e);
        ExprHandle src = construct(ee->expr, width_out);
        *width_out = ee->getWidth();
        if (*width_out==1) {
            return bvBoolExtract(src, ee->offset);
        } else {
            return vc_bvExtract(vc, src, ee->offset + *width_out - 1, ee->offset);
        }
    }

    // Casting

    case Expr::ZExt: {
        int srcWidth;
        CastExpr *ce = cast<CastExpr>(e);
        ExprHandle src = construct(ce->src, &srcWidth);
        *width_out = ce->getWidth();
        if (srcWidth==1) {
            return vc_iteExpr(vc, src, bvOne(*width_out), bvZero(*width_out));
        } else {
            return vc_bvConcatExpr(vc, bvZero(*width_out-srcWidth), src);
        }
    }

    case Expr::SExt: {
        int srcWidth;
        CastExpr *ce = cast<CastExpr>(e);
        ExprHandle src = construct(ce->src, &srcWidth);
        *width_out = ce->getWidth();
        if (srcWidth==1) {
//.........这里部分代码省略.........
开发者ID:paulmar，项目名称:klee，代码行数:101，代码来源:STPBuilder.cpp

示例5: SerializeExpr

uint64_t ExprFrame::SerializeExpr(const ref<Expr> e) {
  data::ExprNode *ser_expr_node = expr_data_->add_expr();
  ser_expr_node->set_id(s_.next_id_++);
  ser_expr_node->set_kind((data::ExprKind)e->getKind());

  switch (e->getKind()) {
  case Expr::Constant: {
    ConstantExpr *ce = cast<ConstantExpr>(e);

    assert(ce->getWidth() <= 64 && "FIXME");
    ser_expr_node->set_value(ce->getZExtValue());
    ser_expr_node->set_width(ce->getWidth());
    break;
  }

  case Expr::NotOptimized: {
    NotOptimizedExpr *noe = cast<NotOptimizedExpr>(e);
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(noe->src));
    break;
  }

  case Expr::Read: {
    ReadExpr *re = cast<ReadExpr>(e);
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(re->index));

    if (re->updates.head) {
      ExprSerializer::UpdateNodePosition un_pos = GetOrSerializeUpdateList(re->updates);
      ser_expr_node->set_update_list_id(un_pos.first);
      ser_expr_node->set_update_list_offset(un_pos.second);
    }
    ser_expr_node->set_array_id(GetOrSerializeArray(re->updates.root));
    break;
  }

  case Expr::Select: {
    SelectExpr *se = cast<SelectExpr>(e);
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(se->cond));
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(se->trueExpr));
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(se->falseExpr));
    break;
  }

  case Expr::Concat: {
    ConcatExpr *ce = cast<ConcatExpr>(e);
    for (unsigned i = 0; i < ce->getNumKids(); ++i) {
      ser_expr_node->add_child_expr_id(GetOrSerializeExpr(ce->getKid(i)));
    }
    break;
  }

  case Expr::Extract: {
    ExtractExpr *ee = cast<ExtractExpr>(e);
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(ee->expr));
    ser_expr_node->set_offset(ee->offset);
    ser_expr_node->set_width(ee->getWidth());
    break;
  }

    // Casting,
  case Expr::ZExt:
  case Expr::SExt: {
    CastExpr *ce = cast<CastExpr>(e);
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(ce->src));
    ser_expr_node->set_width(ce->getWidth());
    break;
  }

    // All subsequent kinds are binary.

    // Arithmetic
  case Expr::Add:
  case Expr::Sub:
  case Expr::Mul:
  case Expr::UDiv:
  case Expr::SDiv:
  case Expr::URem:
  case Expr::SRem: {
    BinaryExpr *be = cast<BinaryExpr>(e);
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(be->left));
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(be->right));
    break;
  }

    // Bit
  case Expr::Not: {
    NotExpr *ne = cast<NotExpr>(e);
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(ne->expr));
    break;
  }

  case Expr::And:
  case Expr::Or:
  case Expr::Xor:
  case Expr::Shl:
  case Expr::LShr:
  case Expr::AShr: {
    BinaryExpr *be = cast<BinaryExpr>(e);
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(be->left));
    ser_expr_node->add_child_expr_id(GetOrSerializeExpr(be->right));
    break;
//.........这里部分代码省略.........
开发者ID:AmesianX，项目名称:chef，代码行数:101，代码来源:ExprSerializer.cpp


注：本文中的ConstantExpr::getWidth方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。