unittests/Assignment/AssignmentTest.cpp


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#include "klee/util/ArrayCache.h"
#include "klee/util/Assignment.h"
#include "gtest/gtest.h"
#include <iostream>
#include <vector>

int finished = 0;

using namespace klee;

TEST(AssignmentTest, FoldNotOptimized)
{
  ArrayCache ac;
  const Array* array = ac.CreateArray("simple_array", /*size=*/ 1);
  // Create a simple assignment
  std::vector<const Array*> objects;
  std::vector<unsigned char> value;
  std::vector< std::vector<unsigned char> > values;
  objects.push_back(array);
  value.push_back(128);
  values.push_back(value);
  // We want to simplify to a constant so allow free values so
  // if the assignment is incomplete we don't get back a constant.
  Assignment assignment(objects, values, /*_allowFreeValues=*/true);

  // Now make an expression that reads from the array at position
  // zero.
  ref<Expr> read = NotOptimizedExpr::alloc(Expr::createTempRead(array, Expr::Int8));

  // Now evaluate. The OptimizedExpr should be folded
  ref<Expr> evaluated = assignment.evaluate(read);
  const ConstantExpr* asConstant = dyn_cast<ConstantExpr>(evaluated);
  ASSERT_TRUE(asConstant != NULL);
  ASSERT_EQ(asConstant->getZExtValue(), (unsigned) 128);
}