[gcc r12-3268] Avoid valid Coverity warning for comparing array to zero.

[gcc r12-3268] Avoid valid Coverity warning for comparing array to zero.

[Martin Sebor]

https://gcc.gnu.org/g:b3aa3288a958a75744df256d70e7f8e90ccab724

commit r12-3268-gb3aa3288a958a75744df256d70e7f8e90ccab724
Author: Martin Sebor <msebor@redhat.com>
Date:   Tue Aug 31 11:16:37 2021 -0600

    Avoid valid Coverity warning for comparing array to zero.
    
            * gimple-ssa-warn-access.cc (maybe_warn_alloc_args_overflow): Test
            pointer element for equality to zero, not that of the cotaining
            array.

Diff:
---
 gcc/gimple-ssa-warn-access.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/gimple-ssa-warn-access.cc b/gcc/gimple-ssa-warn-access.cc
index 5df97a6473a..5a359587ed3 100644
--- a/gcc/gimple-ssa-warn-access.cc
+++ b/gcc/gimple-ssa-warn-access.cc
@@ -2433,7 +2433,7 @@ maybe_warn_alloc_args_overflow (gimple *stmt, const tree args[2],
 	}
     }
 
-  if (!argrange[0])
+  if (!argrange[0][0])
     return;
 
   /* For a two-argument alloc_size, validate the product of the two