Merge pull request github#17826 from MathiasVP/missing-flow-with-aliasing-fields

C++: Add test with missing flow

Author: jketema

cpp/ql/test/library-tests/dataflow/fields/dataflow-consistency.expected

@@ -185,6 +185,8 @@ postWithInFlow
 | simple.cpp:83:12:83:13 | f1 [post update] | PostUpdateNode should not be the target of local flow. |
 | simple.cpp:92:7:92:7 | i [post update] | PostUpdateNode should not be the target of local flow. |
 | simple.cpp:118:7:118:7 | i [post update] | PostUpdateNode should not be the target of local flow. |
+| simple.cpp:124:5:124:6 | * ... [post update] | PostUpdateNode should not be the target of local flow. |
+| simple.cpp:124:6:124:6 | p [inner post update] | PostUpdateNode should not be the target of local flow. |
 | struct_init.c:24:11:24:12 | ab [inner post update] | PostUpdateNode should not be the target of local flow. |
 | struct_init.c:36:17:36:24 | nestedAB [inner post update] | PostUpdateNode should not be the target of local flow. |
 viableImplInCallContextTooLarge

cpp/ql/test/library-tests/dataflow/fields/partial-definition-diff.expected

@@ -291,3 +291,6 @@ WARNING: module 'DataFlow' has been deprecated and may be removed in future (par
 | simple.cpp:94:10:94:11 | a2 | IR only |
 | simple.cpp:118:7:118:7 | i | AST only |
 | simple.cpp:120:8:120:8 | a | IR only |
+| simple.cpp:124:5:124:6 | * ... | AST only |
+| simple.cpp:131:14:131:14 | a | IR only |
+| simple.cpp:136:10:136:10 | a | IR only |

cpp/ql/test/library-tests/dataflow/fields/partial-definition-ir.expected

@@ -651,6 +651,9 @@
 | simple.cpp:94:10:94:11 | a2 |
 | simple.cpp:118:5:118:5 | a |
 | simple.cpp:120:8:120:8 | a |
+| simple.cpp:131:14:131:14 | a |
+| simple.cpp:135:20:135:20 | q |
+| simple.cpp:136:10:136:10 | a |
 | struct_init.c:15:8:15:9 | ab |
 | struct_init.c:15:12:15:12 | a |
 | struct_init.c:16:8:16:9 | ab |

cpp/ql/test/library-tests/dataflow/fields/partial-definition.expected

@@ -581,6 +581,8 @@ WARNING: module 'DataFlow' has been deprecated and may be removed in future (par
 | simple.cpp:92:7:92:7 | i |
 | simple.cpp:118:5:118:5 | a |
 | simple.cpp:118:7:118:7 | i |
+| simple.cpp:124:5:124:6 | * ... |
+| simple.cpp:135:20:135:20 | q |
 | struct_init.c:15:8:15:9 | ab |
 | struct_init.c:15:12:15:12 | a |
 | struct_init.c:16:8:16:9 | ab |

cpp/ql/test/library-tests/dataflow/fields/simple.cpp

@@ -120,4 +120,20 @@ void post_update_to_phi_input(bool b)
   sink(a.i); // $ ast,ir
 }
 
-} // namespace Simple
+void write_to_param(int* p) {
+    *p = user_input();
+}
+
+void alias_with_fields(bool b) {
+    A a;
+    int* q;
+    if(b) {
+        q = &a.i;
+    } else {
+        q = nullptr;
+    }
+    write_to_param(q);
+    sink(a.i); // $ MISSING: ast,ir
+}
+
+} // namespace Simple