C++: Work around 'getUnconvertedResultExpression' having a result for…

… 'CompareNEInstruction's.
github · Nov 20, 2024 · 2dc34c7 · 2dc34c7
1 parent 9fe84eb
commit 2dc34c7
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Showing 4 changed files with 34 additions and 63 deletions.
diff --git 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<int>) = 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
@@ -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 |
@@ -819,34 +807,20 @@ 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 |
 | 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:152:10:152:10 | 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
@@ -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
@@ -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 |