[analyzer] Ensure BugReporterTracking works on regions with pointer arithmetic
Introduce a new helper function, which computes the first symbolic region in
the base region chain. The corresponding symbol has been used for assuming that
a pointer is null. Now, it will also be used for checking if it is null.
This ensures that we are tracking a null pointer correctly in the BugReporter.
llvm-svn: 179916
diff --git a/clang/test/Analysis/inlining/inline-defensive-checks.c b/clang/test/Analysis/inlining/inline-defensive-checks.c
index df3a8f2..aa7f700 100644
--- a/clang/test/Analysis/inlining/inline-defensive-checks.c
+++ b/clang/test/Analysis/inlining/inline-defensive-checks.c
@@ -97,3 +97,16 @@
use(buffer);
buffer[1] = 'b';
}
+
+// Ensure idc works on pointers with constant offset.
+void idcchar(const char *s2) {
+ if(s2)
+ ;
+}
+void testConstantOffset(char *value) {
+ char *cursor = value + 5;
+ idcchar(cursor);
+ if (*cursor) {
+ cursor++;
+ }
+}