1 files changed, 35 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr44404.c b/gcc/testsuite/gcc.dg/pr44404.c
new file mode 100644
index 000000000..a0b4ceb98
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr44404.c
@@ -0,0 +1,35 @@
+/* PR rtl-optimization/44404
+   foo() used to be miscompiled on ARM due to a bug in auto-inc-dec.c,
+   which resulted in "strb r1, [r1], #-36".  */
+
+/* { dg-do run } */
+/* { dg-options "-O2 -fno-unroll-loops" } */
+
+extern char *strcpy (char *, const char *);
+extern int strcmp (const char*, const char*);
+extern void abort (void);
+
+char buf[128];
+
+void __attribute__((noinline))
+bar (int a, const char *p)
+{
+  if (strcmp (p, "0123456789abcdefghijklmnopqrstuvwxyz") != 0)
+    abort ();
+}
+
+void __attribute__((noinline))
+foo (int a)
+{
+  if (a)
+    bar (0, buf);
+  strcpy (buf, "0123456789abcdefghijklmnopqrstuvwxyz");
+  bar (0, buf);
+}
+
+int
+main (void)
+{
+  foo (0);
+  return 0;
+}