* config/arm/arm.c (arm_expand_prologue): In a nested APCS frame with

	arguments to push onto the stack and no varargs, save ip into the last
	stack slot if r3 isn't available on entry.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@206154 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 34 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/arm/nested-apcs.c b/gcc/testsuite/gcc.target/arm/nested-apcs.c
new file mode 100644
index 00000000000..9dac3043e27
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/nested-apcs.c
@@ -0,0 +1,34 @@
+/* { dg-do run } */
+/* { dg-options "-fno-omit-frame-pointer -mapcs-frame -O" } */
+
+extern void abort (void);
+
+struct x
+{
+  int y;
+  int z;
+};
+
+int __attribute__((noinline)) f (int c, int d, int e, int h, int i)
+{
+  int a;
+  struct x b;
+
+  int __attribute__((noinline)) g (int p, int q, int r, struct x s)
+  {
+    return a + p + q + r + s.y + s.z;
+  }
+
+  a = 5;
+  b.y = h;
+  b.z = i;
+
+  return g(c, d, e, b);
+}
+
+int main(void)
+{
+  if (f (1, 2, 3, 4, 5) != 20)
+    abort();
+  return 0;
+}