[gcc(refs/vendors/ARM/heads/gcs-13)] aarch64: Add eh_return compile tests

[gcc(refs/vendors/ARM/heads/gcs-13)] aarch64: Add eh_return compile tests

[Szabolcs Nagy]

https://gcc.gnu.org/g:ec9422d3e066caf3f4a7128750d38117d5ce435d

commit ec9422d3e066caf3f4a7128750d38117d5ce435d
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Fri Jun 2 14:17:02 2023 +0100

    aarch64: Add eh_return compile tests
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/aarch64/eh_return-2.c: New test.
            * gcc.target/aarch64/eh_return-3.c: New test.
    
    (cherry picked from commit cad7e1e3e0dea1922f89290bbbc27b4c44f53bf5)

Diff:
---
 gcc/testsuite/gcc.target/aarch64/eh_return-2.c |  9 +++++++++
 gcc/testsuite/gcc.target/aarch64/eh_return-3.c | 28 ++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/gcc/testsuite/gcc.target/aarch64/eh_return-2.c b/gcc/testsuite/gcc.target/aarch64/eh_return-2.c
new file mode 100644
index 000000000000..4a9d124e8915
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/eh_return-2.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-final { scan-assembler "add\tsp, sp, x5" } } */
+/* { dg-final { scan-assembler "br\tx6" } } */
+
+void
+foo (unsigned long off, void *handler)
+{
+  __builtin_eh_return (off, handler);
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/eh_return-3.c b/gcc/testsuite/gcc.target/aarch64/eh_return-3.c
new file mode 100644
index 000000000000..a17baa86501e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/eh_return-3.c
@@ -0,0 +1,28 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mbranch-protection=pac-ret+leaf -fno-schedule-insns -fno-schedule-insns2" } */
+/* { dg-final { check-function-bodies "**" "" "" } } */
+
+/*
+**foo:
+**	hint	25 // paciasp
+**	...
+**	cbz	w2, .*
+**	mov	x4, 0
+**	...
+**	cbz	x4, .*
+**	add	sp, sp, x5
+**	br	x6
+**	hint	29 // autiasp
+**	ret
+**	mov	x5, x0
+**	mov	x4, 1
+**	mov	x6, x1
+**	b	.*
+*/
+void
+foo (unsigned long off, void *handler, int c)
+{
+  if (c)
+    return;
+  __builtin_eh_return (off, handler);
+}