[gcc r17-3398] ipa/126930 - defend against non-pointers in ptr_deref_may_alias_global_p

https://gcc.gnu.org/g:b6ff1ae5bada420faba2083f27c665274909ee19

commit r17-3398-gb6ff1ae5bada420faba2083f27c665274909ee19
Author: Richard Biener <[email protected]>
Date:   Tue Aug 18 14:40:14 2026 +0200

    ipa/126930 - defend against non-pointers in ptr_deref_may_alias_global_p
    
    The following for consistency reasons defends against accessing
    SSA_NAME_PTR_INFO on non-pointers which might then instead
    access range info.
    
            PR ipa/126930
            * tree-ssa-alias.cc (ptr_deref_may_alias_global_p): Guard
            against non-pointers.
            (ptr_deref_may_alias_auto_p): Likewise.

Diff:
---
 gcc/tree-ssa-alias.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/tree-ssa-alias.cc b/gcc/tree-ssa-alias.cc
index 1d10f6dbd973..7fc87b3b9446 100644
--- a/gcc/tree-ssa-alias.cc
+++ b/gcc/tree-ssa-alias.cc
@@ -224,7 +224,7 @@ ptr_deref_may_alias_global_p (tree ptr, bool escaped_local_p)
 
   /* If we end up with a pointer constant here that may point
      to global memory.  */
-  if (TREE_CODE (ptr) != SSA_NAME)
+  if (TREE_CODE (ptr) != SSA_NAME || !POINTER_TYPE_P (TREE_TYPE (ptr)))
     return true;
 
   pi = SSA_NAME_PTR_INFO (ptr);
@@ -248,7 +248,7 @@ ptr_deref_may_alias_auto_p (tree ptr)
 
   /* If we end up with a pointer constant here that may point
      to local stack memory.  */
-  if (TREE_CODE (ptr) != SSA_NAME)
+  if (TREE_CODE (ptr) != SSA_NAME || !POINTER_TYPE_P (TREE_TYPE (ptr)))
     return true;
 
   pi = SSA_NAME_PTR_INFO (ptr);