return rmm_mgr->get_or_create_unknown_svalue (reg->get_type ());
}
+ /* Alternatively, if this is a symbolic read and the cluster has any bindings,
+ then we don't know if we're reading those values or not, so the result
+ is also "UNKNOWN". */
+ if (reg->get_offset ().symbolic_p ()
+ && m_map.elements () > 0)
+ {
+ region_model_manager *rmm_mgr = mgr->get_svalue_manager ();
+ return rmm_mgr->get_or_create_unknown_svalue (reg->get_type ());
+ }
+
if (const svalue *compound_sval = maybe_get_compound_binding (mgr, reg))
return compound_sval;
--- /dev/null
+#include "analyzer-decls.h"
+
+extern void maybe_write (int *);
+
+void test_1 (int i)
+{
+ /* An array with purely concrete bindings. */
+ int arr[2];
+ arr[0] = 1066;
+ arr[1] = 1776;
+
+ /* Concrete reads. */
+ __analyzer_eval (arr[0] == 1066); /* { dg-warning "TRUE" } */
+ __analyzer_eval (arr[1] == 1776); /* { dg-warning "TRUE" } */
+
+ /* Symbolic read. */
+ __analyzer_describe (0, arr[i]); /* { dg-warning "svalue: 'UNKNOWN\\(int\\)'" } */
+ __analyzer_eval (arr[i] == 1776); /* { dg-warning "UNKNOWN" } */
+}
+
+void test_2 (int i)
+{
+ /* An array that could have been touched. */
+ int arr[2];
+ maybe_write (arr);
+
+ /* Concrete reads. */
+ __analyzer_eval (arr[0] == 42); /* { dg-warning "UNKNOWN" } */
+
+ /* Symbolic read. */
+ __analyzer_eval (arr[i] == 42); /* { dg-warning "UNKNOWN" } */
+}
+
+void test_3 (int i)
+{
+ /* An array that can't have been touched. */
+ int arr[2];
+
+ /* Concrete reads. */
+ __analyzer_eval (arr[0] == 42); /* { dg-warning "UNKNOWN" } */
+
+ /* Symbolic read. */
+ __analyzer_eval (arr[i] == 42); /* { dg-warning "UNKNOWN" } */
+}