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C++: Fix use-after-cast bug in SimpleRangeAnalysis

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Like everywhere else in the range analysis, operands to comparison
operators must be considered in their fully-converted form.
This commit is contained in:
Jonas Jensen
2019-03-07 12:19:02 +01:00
parent ad61b4f55e
commit b827e7a1ea
3 changed files with 8 additions and 8 deletions
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4
cpp/ql/test/library-tests/rangeanalysis/SimpleRangeAnalysis/test.cpp
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@@ -74,7 +74,7 @@ void use_after_cast(unsigned char c)
unsigned short c_times_2 = c + c;
if ((unsigned char)c_times_2 == 0)
{
c_times_2; // BUG: upper bound should be 510, not 0
c_times_2;
}
c_times_2; // BUG: upper bound should be 510, not 255
c_times_2;
}

4
cpp/ql/test/library-tests/rangeanalysis/SimpleRangeAnalysis/upperBound.expected
View File

@@ -462,5 +462,5 @@
| test.cpp:74:30:74:30 | c | 255.0 |
| test.cpp:74:34:74:34 | c | 255.0 |
| test.cpp:75:22:75:30 | c_times_2 | 510.0 |
| test.cpp:77:5:77:13 | c_times_2 | 0.0 |
| test.cpp:79:3:79:11 | c_times_2 | 255.0 |
| test.cpp:77:5:77:13 | c_times_2 | 510.0 |
| test.cpp:79:3:79:11 | c_times_2 | 510.0 |