diff --git a/cpp/ql/lib/semmle/code/cpp/controlflow/IRGuards.qll b/cpp/ql/lib/semmle/code/cpp/controlflow/IRGuards.qll index b90ec6019a9b1..0858b52872779 100644 --- a/cpp/ql/lib/semmle/code/cpp/controlflow/IRGuards.qll +++ b/cpp/ql/lib/semmle/code/cpp/controlflow/IRGuards.qll @@ -325,6 +325,15 @@ private class GuardConditionFromBinaryLogicalOperator extends GuardCondition { } } +bindingset[e] +pragma[inline_late] +private predicate isBoolean(Expr e) { + e.getUnspecifiedType() instanceof BoolType + or + // In C a comparison operation may have an integer type instead of a boolean type. + e instanceof ComparisonOperation +} + /** * A Boolean condition in the AST that guards one or more basic blocks and has a corresponding IR * instruction. @@ -393,6 +402,26 @@ private class GuardConditionFromIR extends GuardCondition { exists(Instruction i | i.getUnconvertedResultExpression() = e and ir.comparesEq(i.getAUse(), k, areEqual, value) + | + // Consider the following snippet: + // ``` + // if(myNumber) { ... } + // ``` + // the IR for this looks like: + // ``` + // r1(glbal) = VariableAddress[myNumber] : + // r2(int) = Load : &r1 + // r3(int) = Constant[0] : + // r4(bool) = CompareNE : r2, r3 + // v5(void) = ConditionalBranch : r4 + // ``` + // In both C and C++, the result of calling `getUnconvertedResultExpression` + // on `r4` is the `myNumber` expression. So users of this predicate would + // conclude that `myNumber = 1` holds on the true branch (since the value + // of `r4` is guaranteed to be `1` on the true branch). + areEqual = false or + not i instanceof CompareNEInstruction or + isBoolean(e) ) } @@ -401,6 +430,11 @@ private class GuardConditionFromIR extends GuardCondition { i.getUnconvertedResultExpression() = e and ir.comparesEq(i.getAUse(), k, areEqual, value) and this.valueControls(block, value) + | + // See the comments on `comparesEq` below for why this is necessary. + areEqual = false or + not i instanceof CompareNEInstruction or + isBoolean(e) ) } diff --git a/cpp/ql/test/library-tests/controlflow/guards-ir/tests.expected b/cpp/ql/test/library-tests/controlflow/guards-ir/tests.expected index c509377a0d801..e5170ddca5911 100644 --- a/cpp/ql/test/library-tests/controlflow/guards-ir/tests.expected +++ b/cpp/ql/test/library-tests/controlflow/guards-ir/tests.expected @@ -74,7 +74,6 @@ astGuardsCompare | 18 | call to get != 0 when call to get is true | | 18 | call to get != 1 when call to get is false | | 18 | call to get == 0 when call to get is false | -| 18 | call to get == 1 when call to get is true | | 26 | 0 < x+0 when ... > ... is true | | 26 | 0 >= x+0 when ... > ... is false | | 26 | ... > ... != 0 when ... > ... is true | @@ -245,22 +244,16 @@ astGuardsCompare | 126 | 1 != 0 when ... && ... is true | | 126 | 1 != 1 when 1 is false | | 126 | 1 == 0 when 1 is false | -| 126 | 1 == 1 when 1 is true | -| 126 | 1 == 1 when ... && ... is true | | 126 | call to test3_condition != 0 when ... && ... is true | | 126 | call to test3_condition != 0 when call to test3_condition is true | | 126 | call to test3_condition != 1 when call to test3_condition is false | | 126 | call to test3_condition == 0 when call to test3_condition is false | -| 126 | call to test3_condition == 1 when ... && ... is true | -| 126 | call to test3_condition == 1 when call to test3_condition is true | | 131 | b != 0 when b is true | | 131 | b != 1 when b is false | | 131 | b == 0 when b is false | -| 131 | b == 1 when b is true | | 137 | 0 != 0 when 0 is true | | 137 | 0 != 1 when 0 is false | | 137 | 0 == 0 when 0 is false | -| 137 | 0 == 1 when 0 is true | | 146 | ! ... != 0 when ! ... is true | | 146 | ! ... != 1 when ! ... is false | | 146 | ! ... == 0 when ! ... is false | @@ -271,14 +264,10 @@ astGuardsCompare | 152 | x != 0 when x is true | | 152 | x != 1 when x is false | | 152 | x == 0 when x is false | -| 152 | x == 1 when ... && ... is true | -| 152 | x == 1 when x is true | | 152 | y != 0 when ... && ... is true | | 152 | y != 0 when y is true | | 152 | y != 1 when y is false | | 152 | y == 0 when y is false | -| 152 | y == 1 when ... && ... is true | -| 152 | y == 1 when y is true | | 156 | ... + ... != x+0 when ... == ... is false | | 156 | ... + ... == x+0 when ... == ... is true | | 156 | ... == ... != 0 when ... == ... is true | @@ -340,7 +329,6 @@ astGuardsCompare | 181 | x != 0 when x is true | | 181 | x != 1 when x is false | | 181 | x == 0 when x is false | -| 181 | x == 1 when x is true | astGuardsControl | test.c:7:9:7:13 | ... > ... | false | 10 | 11 | | test.c:7:9:7:13 | ... > ... | true | 7 | 9 | @@ -819,19 +807,10 @@ astGuardsEnsure_const | test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | != | 0 | 131 | 131 | | test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | != | 0 | 131 | 132 | | test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | != | 0 | 134 | 123 | -| test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 126 | 126 | -| test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 126 | 128 | -| test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 131 | 131 | -| test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 131 | 132 | -| test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 134 | 123 | | test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | != | 0 | 126 | 128 | -| test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | == | 1 | 126 | 128 | | test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | != | 0 | 126 | 128 | -| test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | == | 1 | 126 | 128 | | test.c:126:12:126:26 | call to test3_condition | test.c:126:12:126:26 | call to test3_condition | != | 0 | 126 | 128 | -| test.c:126:12:126:26 | call to test3_condition | test.c:126:12:126:26 | call to test3_condition | == | 1 | 126 | 128 | | test.c:131:7:131:7 | b | test.c:131:7:131:7 | b | != | 0 | 131 | 132 | -| test.c:131:7:131:7 | b | test.c:131:7:131:7 | b | == | 1 | 131 | 132 | | test.c:137:7:137:7 | 0 | test.c:137:7:137:7 | 0 | != | 1 | 142 | 136 | | test.c:137:7:137:7 | 0 | test.c:137:7:137:7 | 0 | == | 0 | 142 | 136 | | test.c:146:7:146:8 | ! ... | test.c:146:7:146:8 | ! ... | != | 0 | 146 | 147 | @@ -839,14 +818,9 @@ astGuardsEnsure_const | test.c:146:7:146:8 | ! ... | test.c:146:8:146:8 | x | == | 0 | 146 | 147 | | test.c:152:10:152:10 | x | test.c:152:10:152:10 | x | != | 0 | 151 | 152 | | test.c:152:10:152:10 | x | test.c:152:10:152:10 | x | != | 0 | 152 | 152 | -| test.c:152:10:152:10 | x | test.c:152:10:152:10 | x | == | 1 | 151 | 152 | -| test.c:152:10:152:10 | x | test.c:152:10:152:10 | x | == | 1 | 152 | 152 | | test.c:152:10:152:15 | ... && ... | test.c:152:10:152:10 | x | != | 0 | 151 | 152 | -| test.c:152:10:152:15 | ... && ... | test.c:152:10:152:10 | x | == | 1 | 151 | 152 | | test.c:152:10:152:15 | ... && ... | test.c:152:15:152:15 | y | != | 0 | 151 | 152 | -| test.c:152:10:152:15 | ... && ... | test.c:152:15:152:15 | y | == | 1 | 151 | 152 | | test.c:152:15:152:15 | y | test.c:152:15:152:15 | y | != | 0 | 151 | 152 | -| test.c:152:15:152:15 | y | test.c:152:15:152:15 | y | == | 1 | 151 | 152 | | test.c:156:9:156:19 | ... == ... | test.c:156:9:156:19 | ... == ... | != | 0 | 156 | 157 | | test.c:156:9:156:19 | ... == ... | test.c:156:9:156:19 | ... == ... | == | 1 | 156 | 157 | | test.c:159:9:159:19 | ... == ... | test.c:159:9:159:19 | ... == ... | != | 0 | 159 | 160 | @@ -865,10 +839,7 @@ astGuardsEnsure_const | test.c:181:9:181:9 | x | test.c:181:9:181:9 | x | != | 0 | 186 | 180 | | test.c:181:9:181:9 | x | test.c:181:9:181:9 | x | != | 1 | 183 | 184 | | test.c:181:9:181:9 | x | test.c:181:9:181:9 | x | == | 0 | 183 | 184 | -| test.c:181:9:181:9 | x | test.c:181:9:181:9 | x | == | 1 | 181 | 182 | -| test.c:181:9:181:9 | x | test.c:181:9:181:9 | x | == | 1 | 186 | 180 | | test.cpp:18:8:18:10 | call to get | test.cpp:18:8:18:10 | call to get | != | 0 | 19 | 19 | -| test.cpp:18:8:18:10 | call to get | test.cpp:18:8:18:10 | call to get | == | 1 | 19 | 19 | | test.cpp:31:7:31:13 | ... == ... | test.cpp:31:7:31:7 | x | != | -1 | 30 | 30 | | test.cpp:31:7:31:13 | ... == ... | test.cpp:31:7:31:7 | x | != | -1 | 34 | 34 | | test.cpp:31:7:31:13 | ... == ... | test.cpp:31:7:31:7 | x | == | -1 | 30 | 30 | diff --git a/cpp/ql/test/library-tests/controlflow/guards/GuardsCompare.expected b/cpp/ql/test/library-tests/controlflow/guards/GuardsCompare.expected index 6c7e6e70db053..f36757aa11337 100644 --- a/cpp/ql/test/library-tests/controlflow/guards/GuardsCompare.expected +++ b/cpp/ql/test/library-tests/controlflow/guards/GuardsCompare.expected @@ -41,7 +41,6 @@ | 18 | call to get != 0 when call to get is true | | 18 | call to get != 1 when call to get is false | | 18 | call to get == 0 when call to get is false | -| 18 | call to get == 1 when call to get is true | | 26 | 0 < x+0 when ... > ... is true | | 26 | 0 >= x+0 when ... > ... is false | | 26 | ... > ... != 0 when ... > ... is true | @@ -186,7 +185,6 @@ | 93 | c != 0 when c is true | | 93 | c != 1 when c is false | | 93 | c == 0 when c is false | -| 93 | c == 1 when c is true | | 94 | 0 != x+0 when ... != ... is true | | 94 | 0 == x+0 when ... != ... is false | | 94 | ... != ... != 0 when ... != ... is true | @@ -199,8 +197,6 @@ | 94 | x == 0+0 when ... != ... is false | | 99 | f != 0 when f is true | | 99 | f != 1 when f is false | -| 99 | f == 0 when f is false | -| 99 | f == 1 when f is true | | 102 | 10 < j+1 when ... < ... is false | | 102 | 10 >= j+1 when ... < ... is true | | 102 | ... < ... != 0 when ... < ... is true | @@ -277,14 +273,10 @@ | 126 | 1 != 0 when ... && ... is true | | 126 | 1 != 1 when 1 is false | | 126 | 1 == 0 when 1 is false | -| 126 | 1 == 1 when 1 is true | -| 126 | 1 == 1 when ... && ... is true | | 126 | call to test3_condition != 0 when ... && ... is true | | 126 | call to test3_condition != 0 when call to test3_condition is true | | 126 | call to test3_condition != 1 when call to test3_condition is false | | 126 | call to test3_condition == 0 when call to test3_condition is false | -| 126 | call to test3_condition == 1 when ... && ... is true | -| 126 | call to test3_condition == 1 when call to test3_condition is true | | 131 | ... + ... != a+0 when call to __builtin_expect is false | | 131 | ... + ... == a+0 when call to __builtin_expect is true | | 131 | ... == ... != 0 when call to __builtin_expect is true | @@ -299,12 +291,10 @@ | 131 | b != 1 when b is false | | 131 | b != a+-42 when call to __builtin_expect is false | | 131 | b == 0 when b is false | -| 131 | b == 1 when b is true | | 131 | b == a+-42 when call to __builtin_expect is true | | 131 | call to __builtin_expect != 0 when call to __builtin_expect is true | | 131 | call to __builtin_expect != 1 when call to __builtin_expect is false | | 131 | call to __builtin_expect == 0 when call to __builtin_expect is false | -| 131 | call to __builtin_expect == 1 when call to __builtin_expect is true | | 135 | ... != ... != 0 when call to __builtin_expect is true | | 135 | ... != ... != 1 when call to __builtin_expect is false | | 135 | ... != ... == 0 when call to __builtin_expect is false | @@ -320,11 +310,9 @@ | 135 | call to __builtin_expect != 0 when call to __builtin_expect is true | | 135 | call to __builtin_expect != 1 when call to __builtin_expect is false | | 135 | call to __builtin_expect == 0 when call to __builtin_expect is false | -| 135 | call to __builtin_expect == 1 when call to __builtin_expect is true | | 137 | 0 != 0 when 0 is true | | 137 | 0 != 1 when 0 is false | | 137 | 0 == 0 when 0 is false | -| 137 | 0 == 1 when 0 is true | | 141 | 42 != a+0 when call to __builtin_expect is false | | 141 | 42 == a+0 when call to __builtin_expect is true | | 141 | ... == ... != 0 when call to __builtin_expect is true | @@ -338,7 +326,6 @@ | 141 | call to __builtin_expect != 0 when call to __builtin_expect is true | | 141 | call to __builtin_expect != 1 when call to __builtin_expect is false | | 141 | call to __builtin_expect == 0 when call to __builtin_expect is false | -| 141 | call to __builtin_expect == 1 when call to __builtin_expect is true | | 145 | 42 != a+0 when call to __builtin_expect is true | | 145 | 42 == a+0 when call to __builtin_expect is false | | 145 | ... != ... != 0 when call to __builtin_expect is true | @@ -352,7 +339,6 @@ | 145 | call to __builtin_expect != 0 when call to __builtin_expect is true | | 145 | call to __builtin_expect != 1 when call to __builtin_expect is false | | 145 | call to __builtin_expect == 0 when call to __builtin_expect is false | -| 145 | call to __builtin_expect == 1 when call to __builtin_expect is true | | 146 | ! ... != 0 when ! ... is true | | 146 | ! ... != 1 when ! ... is false | | 146 | ! ... == 0 when ! ... is false | @@ -362,7 +348,6 @@ | 152 | p != 0 when p is true | | 152 | p != 1 when p is false | | 152 | p == 0 when p is false | -| 152 | p == 1 when p is true | | 158 | ! ... != 0 when ! ... is true | | 158 | ! ... != 1 when ! ... is false | | 158 | ! ... == 0 when ! ... is false | @@ -372,7 +357,6 @@ | 164 | s != 0 when s is true | | 164 | s != 1 when s is false | | 164 | s == 0 when s is false | -| 164 | s == 1 when s is true | | 170 | ! ... != 0 when ! ... is true | | 170 | ! ... != 1 when ! ... is false | | 170 | ! ... == 0 when ! ... is false | diff --git a/cpp/ql/test/library-tests/controlflow/guards/GuardsEnsure.expected b/cpp/ql/test/library-tests/controlflow/guards/GuardsEnsure.expected index 8ba7af67eb5eb..ce708c15bcc47 100644 --- a/cpp/ql/test/library-tests/controlflow/guards/GuardsEnsure.expected +++ b/cpp/ql/test/library-tests/controlflow/guards/GuardsEnsure.expected @@ -424,36 +424,24 @@ unary | test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | != | 0 | 131 | 131 | | test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | != | 0 | 131 | 132 | | test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | != | 0 | 134 | 123 | -| test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 126 | 126 | -| test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 126 | 128 | -| test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 131 | 131 | -| test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 131 | 132 | -| test.c:126:7:126:7 | 1 | test.c:126:7:126:7 | 1 | == | 1 | 134 | 123 | | test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | != | 0 | 126 | 128 | -| test.c:126:7:126:28 | ... && ... | test.c:126:7:126:7 | 1 | == | 1 | 126 | 128 | | test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | != | 0 | 126 | 128 | -| test.c:126:7:126:28 | ... && ... | test.c:126:12:126:26 | call to test3_condition | == | 1 | 126 | 128 | | test.c:126:12:126:26 | call to test3_condition | test.c:126:12:126:26 | call to test3_condition | != | 0 | 126 | 128 | -| test.c:126:12:126:26 | call to test3_condition | test.c:126:12:126:26 | call to test3_condition | == | 1 | 126 | 128 | | test.c:131:7:131:7 | b | test.c:131:7:131:7 | b | != | 0 | 131 | 132 | -| test.c:131:7:131:7 | b | test.c:131:7:131:7 | b | == | 1 | 131 | 132 | | test.c:137:7:137:7 | 0 | test.c:137:7:137:7 | 0 | != | 1 | 142 | 136 | | test.c:137:7:137:7 | 0 | test.c:137:7:137:7 | 0 | == | 0 | 142 | 136 | | test.c:146:7:146:8 | ! ... | test.c:146:7:146:8 | ! ... | != | 0 | 146 | 147 | | test.c:146:7:146:8 | ! ... | test.c:146:7:146:8 | ! ... | == | 1 | 146 | 147 | | test.c:146:7:146:8 | ! ... | test.c:146:8:146:8 | x | == | 0 | 146 | 147 | | test.c:152:8:152:8 | p | test.c:152:8:152:8 | p | != | 0 | 152 | 154 | -| test.c:152:8:152:8 | p | test.c:152:8:152:8 | p | == | 1 | 152 | 154 | | test.c:158:8:158:9 | ! ... | test.c:158:8:158:9 | ! ... | != | 0 | 158 | 160 | | test.c:158:8:158:9 | ! ... | test.c:158:8:158:9 | ! ... | == | 1 | 158 | 160 | | test.c:158:8:158:9 | ! ... | test.c:158:9:158:9 | p | == | 0 | 158 | 160 | | test.c:164:8:164:8 | s | test.c:164:8:164:8 | s | != | 0 | 164 | 166 | -| test.c:164:8:164:8 | s | test.c:164:8:164:8 | s | == | 1 | 164 | 166 | | test.c:170:8:170:9 | ! ... | test.c:170:8:170:9 | ! ... | != | 0 | 170 | 172 | | test.c:170:8:170:9 | ! ... | test.c:170:8:170:9 | ! ... | == | 1 | 170 | 172 | | test.c:170:8:170:9 | ! ... | test.c:170:9:170:9 | s | == | 0 | 170 | 172 | | test.cpp:18:8:18:10 | call to get | test.cpp:18:8:18:10 | call to get | != | 0 | 19 | 19 | -| test.cpp:18:8:18:10 | call to get | test.cpp:18:8:18:10 | call to get | == | 1 | 19 | 19 | | test.cpp:31:7:31:13 | ... == ... | test.cpp:31:7:31:7 | x | != | -1 | 30 | 30 | | test.cpp:31:7:31:13 | ... == ... | test.cpp:31:7:31:7 | x | != | -1 | 34 | 34 | | test.cpp:31:7:31:13 | ... == ... | test.cpp:31:7:31:7 | x | == | -1 | 30 | 30 | @@ -477,9 +465,7 @@ unary | test.cpp:74:10:74:10 | i | test.cpp:74:10:74:10 | i | >= | 0 | 75 | 77 | | test.cpp:74:10:74:10 | i | test.cpp:74:10:74:10 | i | >= | 11 | 78 | 79 | | test.cpp:93:6:93:6 | c | test.cpp:93:6:93:6 | c | != | 0 | 93 | 94 | -| test.cpp:93:6:93:6 | c | test.cpp:93:6:93:6 | c | == | 1 | 93 | 94 | | test.cpp:99:6:99:6 | f | test.cpp:99:6:99:6 | f | != | 0 | 99 | 100 | -| test.cpp:99:6:99:6 | f | test.cpp:99:6:99:6 | f | == | 1 | 99 | 100 | | test.cpp:105:6:105:14 | ... != ... | test.cpp:105:6:105:14 | ... != ... | != | 0 | 105 | 106 | | test.cpp:105:6:105:14 | ... != ... | test.cpp:105:6:105:14 | ... != ... | == | 1 | 105 | 106 | | test.cpp:111:6:111:14 | ... != ... | test.cpp:111:6:111:14 | ... != ... | != | 0 | 111 | 112 | @@ -495,20 +481,16 @@ unary | test.cpp:125:14:125:17 | call to safe | test.cpp:125:14:125:17 | call to safe | != | 1 | 125 | 125 | | test.cpp:125:14:125:17 | call to safe | test.cpp:125:14:125:17 | call to safe | == | 0 | 125 | 125 | | test.cpp:131:6:131:21 | call to __builtin_expect | test.cpp:131:6:131:21 | call to __builtin_expect | != | 0 | 131 | 132 | -| test.cpp:131:6:131:21 | call to __builtin_expect | test.cpp:131:6:131:21 | call to __builtin_expect | == | 1 | 131 | 132 | | test.cpp:131:6:131:21 | call to __builtin_expect | test.cpp:131:23:131:33 | ... == ... | != | 0 | 131 | 132 | | test.cpp:131:6:131:21 | call to __builtin_expect | test.cpp:131:23:131:33 | ... == ... | == | 1 | 131 | 132 | | test.cpp:135:6:135:21 | call to __builtin_expect | test.cpp:135:6:135:21 | call to __builtin_expect | != | 0 | 135 | 136 | -| test.cpp:135:6:135:21 | call to __builtin_expect | test.cpp:135:6:135:21 | call to __builtin_expect | == | 1 | 135 | 136 | | test.cpp:135:6:135:21 | call to __builtin_expect | test.cpp:135:23:135:33 | ... != ... | != | 0 | 135 | 136 | | test.cpp:135:6:135:21 | call to __builtin_expect | test.cpp:135:23:135:33 | ... != ... | == | 1 | 135 | 136 | | test.cpp:141:6:141:21 | call to __builtin_expect | test.cpp:141:6:141:21 | call to __builtin_expect | != | 0 | 141 | 142 | -| test.cpp:141:6:141:21 | call to __builtin_expect | test.cpp:141:6:141:21 | call to __builtin_expect | == | 1 | 141 | 142 | | test.cpp:141:6:141:21 | call to __builtin_expect | test.cpp:141:23:141:23 | a | == | 42 | 141 | 142 | | test.cpp:141:6:141:21 | call to __builtin_expect | test.cpp:141:23:141:29 | ... == ... | != | 0 | 141 | 142 | | test.cpp:141:6:141:21 | call to __builtin_expect | test.cpp:141:23:141:29 | ... == ... | == | 1 | 141 | 142 | | test.cpp:145:6:145:21 | call to __builtin_expect | test.cpp:145:6:145:21 | call to __builtin_expect | != | 0 | 145 | 146 | -| test.cpp:145:6:145:21 | call to __builtin_expect | test.cpp:145:6:145:21 | call to __builtin_expect | == | 1 | 145 | 146 | | test.cpp:145:6:145:21 | call to __builtin_expect | test.cpp:145:23:145:23 | a | != | 42 | 145 | 146 | | test.cpp:145:6:145:21 | call to __builtin_expect | test.cpp:145:23:145:29 | ... != ... | != | 0 | 145 | 146 | | test.cpp:145:6:145:21 | call to __builtin_expect | test.cpp:145:23:145:29 | ... != ... | == | 1 | 145 | 146 |