1 files changed, 42 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.target/arm/frame-pointer-1.c b/gcc-4.9/gcc/testsuite/gcc.target/arm/frame-pointer-1.c
new file mode 100644
index 000000000..bb1888e38
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.target/arm/frame-pointer-1.c
@@ -0,0 +1,42 @@
+/* Check local register variables using a register conventionally 
+   used as the frame pointer aren't clobbered under high register pressure.  */
+/* { dg-do run } */
+/* { dg-options "-Os -mthumb -fomit-frame-pointer" } */
+
+#include <stdlib.h>
+
+int global=5;
+
+void __attribute__((noinline)) foo(int p1, int p2, int p3, int p4)
+{
+  if (global != 5 || p1 != 1 || p2 != 2 || p3 != 3 || p4 != 4)
+    abort();
+}
+
+int __attribute__((noinline)) test(int a, int b, int c, int d)
+{
+  register unsigned long r __asm__("r7") = 0xdeadbeef;
+  int e;
+
+  /* ABCD are live after the call which should be enough
+     to cause r7 to be used if it weren't for the register variable.  */
+  foo(a,b,c,d);
+
+  e = 0;
+  __asm__ __volatile__ ("mov %0, %2"
+			: "=r" (e)
+			: "0" (e), "r" (r));
+
+  global = a+b+c+d;
+
+  return e;
+}
+
+int main()
+{
+  if (test(1, 2, 3, 4) != 0xdeadbeef)
+    abort();
+  if (global != 10)
+    abort();
+  return 0;
+}