--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/builtin-memcpy.c	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,43 @@
+/* PR tree-optimization/88800 - Spurious -Werror=array-bounds for non-taken
+   branch
+   Verify that out-of-bounds memcpy calls are not folded when warnings are
+   enabled (builtin-memcpy-2.c verifies they're not folded with warnings
+   disabled).
+   { dg-do compile }
+   { dg-options "-O2 -Wall -fdump-tree-optimized" } */
+
+extern void* memcpy (void*, const void*, __SIZE_TYPE__);
+
+char a1[1], a2[2], a4[4], a8[8], a16[16], a32[32];
+
+void f1 (const void *p)
+{
+  memcpy (a1, p, sizeof a1 * 2);    /* { dg-warning "\\\[-Warray-bounds" } */
+}
+
+void f2 (const void *p)
+{
+  memcpy (a2, p, sizeof a2 * 2);    /* { dg-warning "\\\[-Warray-bounds" } */
+}
+
+void f4 (const void *p)
+{
+  memcpy (a4, p, sizeof a4 * 2);    /* { dg-warning "\\\[-Warray-bounds" } */
+}
+
+void f8 (const void *p)
+{
+  memcpy (a8, p, sizeof a8 * 2);    /* { dg-warning "\\\[-Warray-bounds" } */
+}
+
+void f16 (const void *p)
+{
+  memcpy (a16, p, sizeof a16 * 2);  /* { dg-warning "\\\[-Warray-bounds" } */
+}
+
+void f32 (const void *p)
+{
+  memcpy (a32, p, sizeof a32 * 2);  /* { dg-warning "\\\[-Warray-bounds" } */
+}
+
+/* { dg-final { scan-tree-dump-times "memcpy" 6 "optimized" } } */