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ExprData: Better handling of ternary operator

This commit is contained in:
Daniel Marjamäki 2020-05-15 21:34:52 +02:00
parent 76f4fae806
commit 871cf379d5
2 changed files with 38 additions and 7 deletions
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17
lib/exprengine.cpp
View File

@ -1613,13 +1613,28 @@ static ExprEngine::ValuePtr executeBinaryOp(const Token *tok, Data &data)
ExprEngine::ValuePtr v1 = executeExpression(tok->astOperand1(), data);
ExprEngine::ValuePtr v2;
if (tok->str() == "?" && tok->astOperand1()->hasKnownIntValue()) {
if (tok->str() == "?") {
if (tok->astOperand1()->hasKnownIntValue()) {
if (tok->astOperand1()->getKnownIntValue())
v2 = executeExpression(tok->astOperand2()->astOperand1(), data);
else
v2 = executeExpression(tok->astOperand2()->astOperand2(), data);
call(data.callbacks, tok, v2, &data);
return v2;
}
Data trueData(data);
trueData.addConstraint(v1, true);
auto trueValue = simplifyValue(executeExpression(tok->astOperand2()->astOperand1(), trueData));
Data falseData(data);
falseData.addConstraint(v1, false);
auto falseValue = simplifyValue(executeExpression(tok->astOperand2()->astOperand2(), falseData));
auto result = simplifyValue(std::make_shared<ExprEngine::BinOpResult>("?", v1, std::make_shared<ExprEngine::BinOpResult>(":", trueValue, falseValue)));
call(data.callbacks, tok, result, &data);
return result;
} else if (tok->str() == "&&" || tok->str() == "||") {
Data data2(data);
data2.addConstraint(v1, tok->str() == "&&");

16
test/testexprengine.cpp
View File

@ -97,6 +97,8 @@ private:
TEST_CASE(structMember1);
TEST_CASE(structMember2);
TEST_CASE(structMember3);
TEST_CASE(ternaryOperator1);
#endif
}
@ -656,6 +658,20 @@ private:
ASSERT_EQUALS(expected, expr(code, "=="));
}
void ternaryOperator1() {
const char code[] = "void foo(signed char x) {\n"
" x = (x > 0) ? (0==x) : 0;\n"
"}";
const char expected[] = "(> $1 0)\n"
"(and (>= $1 (- 128)) (<= $1 127))\n"
"(= 0 $1)\n"
"z3::unsat\n";
ASSERT_EQUALS(expected, expr(code, "=="));
}
};
REGISTER_TEST(TestExprEngine)