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clang-p2996/clang/test/Analysis/constraint_manager_conditions.cpp
Denys Petrov e1741e34e0 [analyzer] Reasoning about comparison expressions in RangeConstraintManager 
Summary:

Implemented RangeConstraintManager::getRangeForComparisonSymbol which handles comparison operators.
RangeConstraintManager::getRangeForComparisonSymbol cares about the sanity of comparison expressions sequences helps reasonably to branch an exploded graph.
It can significantly reduce the graph and speed up the analysis. For more details, please, see the differential revision.

This fixes https://bugs.llvm.org/show_bug.cgi?id=13426

Differential Revision: https://reviews.llvm.org/D78933
2020-06-15 18:35:15 +03:00

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// RUN: %clang_analyze_cc1 -analyzer-checker=debug.ExprInspection -verify %s
void clang_analyzer_eval(int);
void comparison_lt(int x, int y) {
if (x < y) {
clang_analyzer_eval(x < y); // expected-warning{{TRUE}}
clang_analyzer_eval(y > x); // expected-warning{{TRUE}}
clang_analyzer_eval(x > y); // expected-warning{{FALSE}}
clang_analyzer_eval(y < x); // expected-warning{{FALSE}}
clang_analyzer_eval(x <= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y >= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x >= y); // expected-warning{{FALSE}}
clang_analyzer_eval(y <= x); // expected-warning{{FALSE}}
clang_analyzer_eval(x == y); // expected-warning{{FALSE}}
clang_analyzer_eval(y == x); // expected-warning{{FALSE}}
clang_analyzer_eval(x != y); // expected-warning{{TRUE}}
clang_analyzer_eval(y != x); // expected-warning{{TRUE}}
} else {
clang_analyzer_eval(x < y); // expected-warning{{FALSE}}
clang_analyzer_eval(y > x); // expected-warning{{FALSE}}
clang_analyzer_eval(x > y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y < x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x <= y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y >= x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x >= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y <= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x == y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y == x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x != y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y != x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
}
}
void comparison_gt(int x, int y) {
if (x > y) {
clang_analyzer_eval(x < y); // expected-warning{{FALSE}}
clang_analyzer_eval(y > x); // expected-warning{{FALSE}}
clang_analyzer_eval(x > y); // expected-warning{{TRUE}}
clang_analyzer_eval(y < x); // expected-warning{{TRUE}}
clang_analyzer_eval(x <= y); // expected-warning{{FALSE}}
clang_analyzer_eval(y >= x); // expected-warning{{FALSE}}
clang_analyzer_eval(x >= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y <= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x == y); // expected-warning{{FALSE}}
clang_analyzer_eval(y == x); // expected-warning{{FALSE}}
clang_analyzer_eval(x != y); // expected-warning{{TRUE}}
clang_analyzer_eval(y != x); // expected-warning{{TRUE}}
} else {
clang_analyzer_eval(x < y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y > x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x > y); // expected-warning{{FALSE}}
clang_analyzer_eval(y < x); // expected-warning{{FALSE}}
clang_analyzer_eval(x <= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y >= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x >= y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y <= x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x == y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y == x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x != y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y != x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
}
}
void comparison_le(int x, int y) {
if (x <= y) {
clang_analyzer_eval(x < y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y > x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x > y); // expected-warning{{FALSE}}
clang_analyzer_eval(y < x); // expected-warning{{FALSE}}
clang_analyzer_eval(x <= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y >= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x >= y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y <= x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x == y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y == x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x != y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y != x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
} else {
clang_analyzer_eval(x < y); // expected-warning{{FALSE}}
clang_analyzer_eval(y > x); // expected-warning{{FALSE}}
clang_analyzer_eval(x > y); // expected-warning{{TRUE}}
clang_analyzer_eval(y < x); // expected-warning{{TRUE}}
clang_analyzer_eval(x <= y); // expected-warning{{FALSE}}
clang_analyzer_eval(y >= x); // expected-warning{{FALSE}}
clang_analyzer_eval(x >= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y <= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x == y); // expected-warning{{FALSE}}
clang_analyzer_eval(y == x); // expected-warning{{FALSE}}
clang_analyzer_eval(x != y); // expected-warning{{TRUE}}
clang_analyzer_eval(y != x); // expected-warning{{TRUE}}
}
}
void comparison_ge(int x, int y) {
if (x >= y) {
clang_analyzer_eval(x < y); // expected-warning{{FALSE}}
clang_analyzer_eval(y > x); // expected-warning{{FALSE}}
clang_analyzer_eval(x > y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y < x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x <= y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y >= x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x >= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y <= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x == y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y == x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x != y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y != x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
} else {
clang_analyzer_eval(x < y); // expected-warning{{TRUE}}
clang_analyzer_eval(y > x); // expected-warning{{TRUE}}
clang_analyzer_eval(x > y); // expected-warning{{FALSE}}
clang_analyzer_eval(y < x); // expected-warning{{FALSE}}
clang_analyzer_eval(x <= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y >= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x >= y); // expected-warning{{FALSE}}
clang_analyzer_eval(y <= x); // expected-warning{{FALSE}}
clang_analyzer_eval(x == y); // expected-warning{{FALSE}}
clang_analyzer_eval(y == x); // expected-warning{{FALSE}}
clang_analyzer_eval(x != y); // expected-warning{{TRUE}}
clang_analyzer_eval(y != x); // expected-warning{{TRUE}}
}
}
void comparison_eq(int x, int y) {
if (x == y) {
clang_analyzer_eval(x < y); // expected-warning{{FALSE}}
clang_analyzer_eval(y > x); // expected-warning{{FALSE}}
clang_analyzer_eval(x > y); // expected-warning{{FALSE}}
clang_analyzer_eval(y < x); // expected-warning{{FALSE}}
clang_analyzer_eval(x <= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y >= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x >= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y <= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x == y); // expected-warning{{TRUE}}
clang_analyzer_eval(y == x); // expected-warning{{TRUE}}
clang_analyzer_eval(x != y); // expected-warning{{FALSE}}
clang_analyzer_eval(y != x); // expected-warning{{FALSE}}
} else {
clang_analyzer_eval(x < y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y > x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x > y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y < x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x <= y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y >= x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x >= y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y <= x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x == y); // expected-warning{{FALSE}}
clang_analyzer_eval(y == x); // expected-warning{{FALSE}}
clang_analyzer_eval(x != y); // expected-warning{{TRUE}}
clang_analyzer_eval(y != x); // expected-warning{{TRUE}}
}
}
void comparison_ne(int x, int y) {
if (x != y) {
clang_analyzer_eval(x < y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y > x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x > y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y < x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x <= y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y >= x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x >= y); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(y <= x); // expected-warning{{TRUE}} expected-warning{{FALSE}}
clang_analyzer_eval(x == y); // expected-warning{{FALSE}}
clang_analyzer_eval(y == x); // expected-warning{{FALSE}}
clang_analyzer_eval(x != y); // expected-warning{{TRUE}}
clang_analyzer_eval(y != x); // expected-warning{{TRUE}}
} else {
clang_analyzer_eval(x < y); // expected-warning{{FALSE}}
clang_analyzer_eval(y > x); // expected-warning{{FALSE}}
clang_analyzer_eval(x > y); // expected-warning{{FALSE}}
clang_analyzer_eval(y < x); // expected-warning{{FALSE}}
clang_analyzer_eval(x <= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y >= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x >= y); // expected-warning{{TRUE}}
clang_analyzer_eval(y <= x); // expected-warning{{TRUE}}
clang_analyzer_eval(x == y); // expected-warning{{TRUE}}
clang_analyzer_eval(y == x); // expected-warning{{TRUE}}
clang_analyzer_eval(x != y); // expected-warning{{FALSE}}
clang_analyzer_eval(y != x); // expected-warning{{FALSE}}
}
}
void comparison_le_ne(int x, int y) {
if (x <= y)
if (x != y) {
clang_analyzer_eval(x < y); // expected-warning{{TRUE}}
clang_analyzer_eval(y > x); // expected-warning{{TRUE}}
clang_analyzer_eval(x >= y); // expected-warning{{FALSE}}
clang_analyzer_eval(y <= x); // expected-warning{{FALSE}}
}
}
void comparison_ge_ne(int x, int y) {
if (x >= y)
if (x != y) {
clang_analyzer_eval(x > y); // expected-warning{{TRUE}}
clang_analyzer_eval(y < x); // expected-warning{{TRUE}}
clang_analyzer_eval(x <= y); // expected-warning{{FALSE}}
clang_analyzer_eval(y >= x); // expected-warning{{FALSE}}
}
}
void comparison_le_ge(int x, int y) {
if (x <= y)
if (x >= y) {
clang_analyzer_eval(x == y); // expected-warning{{TRUE}}
clang_analyzer_eval(y == x); // expected-warning{{TRUE}}
clang_analyzer_eval(x != y); // expected-warning{{FALSE}}
clang_analyzer_eval(y != x); // expected-warning{{FALSE}}
}
}
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