1 files changed, 45 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/max-1.c b/gcc/testsuite/gcc.dg/max-1.c
new file mode 100644
index 000000000..40f2145c0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/max-1.c
@@ -0,0 +1,45 @@
+/* PR middle-end/18548 */
+/* Test case reduced by Andrew Pinski <pinskia@physics.uc.edu> */
+/* { dg-do run } */
+/* { dg-options "-O1 " } */
+/* Option -fno-tree-lrs removed By Andrew MacLeod since it is no longer 
+   supported in the compiler beginning with GCC 4.3.  */
+/* m32c has varying sized pointers */
+/* { dg-skip-if "" { "m32c-*-*" } { "*" } { "-mcpu=m32c" "-mcpu=m32cm" } } */
+
+/* Kludge to make it signed. */
+#define unsigned signed
+__extension__ typedef __SIZE_TYPE__ ssize_t;
+#undef unsigned
+
+extern void abort (void);
+
+ssize_t fff[10];
+
+void f(ssize_t a, ssize_t b)
+{
+  ssize_t crcc = b;
+  ssize_t d = *((ssize_t*)(a+1));
+  int i;
+
+  a = d >= b? d:b;
+
+
+  for(i=0;i<10;i++)
+   fff[i] = a;
+}
+
+/* The variable a cannot be a local variable as we get better aliasing
+   now and decide that the store to a is dead.  The better aliasing comes
+   from better representation of pointer arithmetic. */
+ssize_t a = 10;
+int main(void)
+{
+  int i;
+  f((ssize_t)(&a)-1,0);
+  for(i = 0;i<10;i++)
+   if (fff[i]!=10)
+    abort ();
+  return 0;
+}
+