[gcc r12-8432] pointer-query: Fix ICE with non-pointer param [PR105635]

[Jakub Jelinek <jakub@gcc.gnu.org>]

https://gcc.gnu.org/g:7b88f9b8881b7653b5a834da1b2b8fda463e61c0

commit r12-8432-g7b88f9b8881b7653b5a834da1b2b8fda463e61c0
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu May 19 11:56:21 2022 +0200

    pointer-query: Fix ICE with non-pointer param [PR105635]
    
    The gimple_parm_array_size function comment talks about pointe parameters
    but doesn't actually verify it, it checks whether an attribute is present
    on the function and then just uses TREE_TYPE (TREE_TYPE (var)) which
    assumes a pointer type (or in theory could work for ARRAY_TYPE but
    c-family languages which only have that attribute will never have ARRAY_TYPE
    parameters; and for VECTOR_TYPE/COMPLEX_TYPE it would mean something quite
    different).
    
    So, this patch punts early if var doesn't have pointer/reference type.
    
    2022-05-19  Jakub Jelinek  <jakub@redhat.com>
    
            PR c/105635
            * pointer-query.cc (gimple_parm_array_size): Return NULL if var
            doesn't have pointer or reference type.
    
            * gcc.dg/pr105635.c: New test.
    
    (cherry picked from commit 3b4daa0b3c3d8eb2ac3b40ad6898f314ed4d7919)

Diff:
---
 gcc/pointer-query.cc            |  2 +-
 gcc/testsuite/gcc.dg/pr105635.c | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/gcc/pointer-query.cc b/gcc/pointer-query.cc
index d93657f3206..b133e7cad14 100644
--- a/gcc/pointer-query.cc
+++ b/gcc/pointer-query.cc
@@ -554,7 +554,7 @@ gimple_parm_array_size (tree ptr, wide_int rng[2],
      from the current function declaratation (e.g., attribute access or
      related).  */
   tree var = SSA_NAME_VAR (ptr);
-  if (TREE_CODE (var) != PARM_DECL)
+  if (TREE_CODE (var) != PARM_DECL || !POINTER_TYPE_P (TREE_TYPE (var)))
     return NULL_TREE;
 
   const unsigned prec = TYPE_PRECISION (sizetype);
diff --git a/gcc/testsuite/gcc.dg/pr105635.c b/gcc/testsuite/gcc.dg/pr105635.c
new file mode 100644
index 00000000000..aa02f593bfa
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr105635.c
@@ -0,0 +1,11 @@
+/* PR c/105635 */
+/* { dg-do compile } */
+/* { dg-options "-Wall" } */
+
+void foo (int, int[*]);	/* { dg-message "previous declaration of 'foo' with type" } */
+
+foo (int x, int y)	/* { dg-warning "return type defaults to 'int'" } */
+{			/* { dg-warning "conflicting types for 'foo'" "" { target *-*-* } .-1 } */
+			/* { dg-message "declared here" "" { target *-*-* } .-2 } */
+  return (x >= 0) != (y < 0);	/* { dg-warning "'return' with a value, in function returning void" } */
+}