[gcc r14-10149] c++: ICE with templated sizeof(E1) / sizeof(E2) [PR114888]

[Patrick Palka via Gcc-cvs]

https://gcc.gnu.org/g:3c925ac349b03ae9439c632fb1c042cdc8d78f40

commit r14-10149-g3c925ac349b03ae9439c632fb1c042cdc8d78f40
Author: Patrick Palka <ppa...@redhat.com>
Date:   Mon Apr 29 21:14:18 2024 -0400

    c++: ICE with templated sizeof(E1) / sizeof(E2) [PR114888]
    
    In the sizeof / sizeof operator expression handling we're missing
    a dependence check for the second operand.
    
            PR c++/114888
    
    gcc/cp/ChangeLog:
    
            * typeck.cc (cp_build_binary_op) <case *_DIV_*>: Add missing
            dependence check for the second sizeof operand.
    
    gcc/testsuite/ChangeLog:
    
            * g++.dg/template/sizeof19.C: New test.
    
    Reviewed-by: Jason Merrill <ja...@redhat.com>
    (cherry picked from commit 3900e944b0ac9db77380c5bb8635977dfd3b0691)

Diff:
---
 gcc/cp/typeck.cc                         | 1 +
 gcc/testsuite/g++.dg/template/sizeof19.C | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/gcc/cp/typeck.cc b/gcc/cp/typeck.cc
index e5a52dc2b39..a25f8622651 100644
--- a/gcc/cp/typeck.cc
+++ b/gcc/cp/typeck.cc
@@ -5501,6 +5501,7 @@ cp_build_binary_op (const op_location_t &location,
          if (!TYPE_P (type1))
            type1 = TREE_TYPE (type1);
          if (type0
+             && type1
              && INDIRECT_TYPE_P (type0)
              && same_type_p (TREE_TYPE (type0), type1))
            {
diff --git a/gcc/testsuite/g++.dg/template/sizeof19.C 
b/gcc/testsuite/g++.dg/template/sizeof19.C
new file mode 100644
index 00000000000..a1467995a9b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/sizeof19.C
@@ -0,0 +1,8 @@
+// PR c++/114888
+
+template<class>
+struct A {
+  struct B {} *b;
+  static const int c = sizeof (b) / sizeof (b[0]);
+};
+const int d = A<int>::c;