[gcc r13-8743] testsuite: Add more allocation size tests for conjured svalues [PR110014]

[David Malcolm via Gcc-cvs]

https://gcc.gnu.org/g:e0c52905f666e3d23881f82dbf39466a24f009f4

commit r13-8743-ge0c52905f666e3d23881f82dbf39466a24f009f4
Author: Tim Lange <m...@tim-lange.me>
Date:   Thu May 9 13:09:26 2024 -0400

    testsuite: Add more allocation size tests for conjured svalues [PR110014]
    
    This patch adds the reproducers reported in PR 110014 as test cases. The
    false positives in those cases are already fixed with PR 109577.
    
    2023-06-09  Tim Lange  <m...@tim-lange.me>
    
            PR analyzer/110014
    
    gcc/testsuite/ChangeLog:
    
            * gcc.dg/analyzer/realloc-pr110014.c: New tests.
    
    (cherry picked from commit 
r14-1685-g39adc5eebd61fd276f3f1ef9d7228756a35bd0cb)
    
    Signed-off-by: David Malcolm <dmalc...@redhat.com>

Diff:
---
 gcc/testsuite/gcc.dg/analyzer/realloc-pr110014.c | 25 ++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/gcc/testsuite/gcc.dg/analyzer/realloc-pr110014.c 
b/gcc/testsuite/gcc.dg/analyzer/realloc-pr110014.c
new file mode 100644
index 000000000000..d76b87814136
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/analyzer/realloc-pr110014.c
@@ -0,0 +1,25 @@
+void *realloc (void *, unsigned long)
+  __attribute__((__nothrow__, __leaf__))
+  __attribute__((__warn_unused_result__)) __attribute__((__alloc_size__ (2)));
+
+long *
+slurp (long *buffer, unsigned long file_size)
+{
+  unsigned long cc;
+  if (!__builtin_add_overflow (file_size - file_size % sizeof (long),
+                              2 * sizeof (long), &cc))
+    buffer = realloc (buffer, cc);
+  return buffer;
+}
+
+long *
+slurp1 (long *buffer, unsigned long file_size)
+{
+  return realloc (buffer, file_size - file_size % sizeof (long));
+}
+
+long *
+slurp2 (long *buffer, unsigned long file_size)
+{
+  return realloc (buffer, (file_size / sizeof (long)) * sizeof (long));
+}