[PATCH] ipa/105166 - avoid modref queries with mismatching types

[Richard Biener via Gcc-patches]

We should avoid mismatched argument values (integers for pointers)
when doing modref queries.  This is the third place to guard.

Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.

2022-04-06  Richard Biener  <rguent...@suse.de>

        PR ipa/105166
        * ipa-modref-tree.cc (modref_access_node::get_ao_ref ): Bail
        out for non-pointer arguments.

        * gcc.dg/torture/pr105166.c: New testcase.
---
 gcc/ipa-modref-tree.cc                  | 4 +++-
 gcc/testsuite/gcc.dg/torture/pr105166.c | 9 +++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.dg/torture/pr105166.c

diff --git a/gcc/ipa-modref-tree.cc b/gcc/ipa-modref-tree.cc
index d0ec2fbf004..f19af8c2b55 100644
--- a/gcc/ipa-modref-tree.cc
+++ b/gcc/ipa-modref-tree.cc
@@ -678,7 +678,9 @@ modref_access_node::get_ao_ref (const gcall *stmt, ao_ref 
*ref) const
 {
   tree arg;
 
-  if (!parm_offset_known || !(arg = get_call_arg (stmt)))
+  if (!parm_offset_known
+      || !(arg = get_call_arg (stmt))
+      || !POINTER_TYPE_P (TREE_TYPE (arg)))
     return false;
   poly_offset_int off = (poly_offset_int)offset
        + ((poly_offset_int)parm_offset << LOG2_BITS_PER_UNIT);
diff --git a/gcc/testsuite/gcc.dg/torture/pr105166.c 
b/gcc/testsuite/gcc.dg/torture/pr105166.c
new file mode 100644
index 00000000000..60e8b73a466
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr105166.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+
+int bar (foo, a)
+  int (**foo) ();
+  int a;
+{
+  (foo)[1] = bar;
+  foo[1] (1);
+}
-- 
2.34.1