1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/ipa/pure-const-2.c b/gcc/testsuite/gcc.dg/ipa/pure-const-2.c
new file mode 100644
index 00000000000..51d779776bc
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/ipa/pure-const-2.c
@@ -0,0 +1,28 @@
+/* { dg-do compile } */
+/* { dg-options "-O3 -fdump-tree-local-pure-const1 -fdump-tree-optimized" } */
+static __attribute__ ((noinline, noclone))
+int i_am_pure(char *c, int n)
+{
+  char *d=__builtin_alloca (n);
+  int i;
+  int sum;
+  for (i=0;i<n;i++)
+    d[i] = c[i];
+  for (i=0;i<n;i++)
+    d[i] *= c[n-i];
+  for (i=0;i<n;i++)
+    sum+=d[i];
+  if (sum)
+    __builtin_unreachable ();
+  return sum;
+}
+char array[11];
+int
+main(void)
+{
+  i_am_pure (array,5);
+  i_am_pure (array,11);
+  return 0;
+}
+/* { dg-final { scan-tree-dump "found to be pure: i_am_pure" "local-pure-const1"} } */
+/* { dg-final { scan-tree-dump-not "i_am_pure" "optimized"} } */