--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/Walloc-size-larger-than-14.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,30 @@
+/* PR middle-end/82063 - issues with arguments enabled by -Wall
+   { dg-do compile }
+   { dg-options "-O -Walloc-size-larger-than=123456789123456789123456789123456789 -ftrack-macro-expansion=0" } */
+
+typedef __SIZE_TYPE__ size_t;
+
+void sink (void*);
+
+#define T(x) sink (x)
+
+/* Verify that an exceedingly large -Walloc-size-larger-than argument
+   with no suffix is accepted and treated as infinite.  */
+
+void f (void)
+{
+  size_t n = 0;
+  T (__builtin_malloc (n));
+
+  n = __PTRDIFF_MAX__;
+  T (__builtin_malloc (n));
+
+  n += 1;
+  T (__builtin_malloc (n));
+
+  n = __SIZE_MAX__ - 1;
+  T (__builtin_malloc (n));
+
+  n = __SIZE_MAX__;
+  T (__builtin_malloc (n));
+}