On Fri, Feb 05, 2016 at 05:07:57PM +0100, Dominik Vogt wrote:
> The attached patch adds a testcase for PR 69625.
Version 2 also runs with -m31.
Ciao
Dominik ^_^ ^_^
--
Dominik Vogt
IBM Germany
ChangeLog
* gcc.target/s390/pr69625.c: Add test case.
>From 5c539cfea4292dc20bb5e7f854101997f11bc215 Mon Sep 17 00:00:00 2001
From: Dominik Vogt <v...@linux.vnet.ibm.com>
Date: Fri, 5 Feb 2016 15:13:08 +0100
Subject: [PATCH] S/390: PR 69625: Add test case.
---
gcc/testsuite/gcc.target/s390/pr69625.c | 37 +++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/s390/pr69625.c
diff --git a/gcc/testsuite/gcc.target/s390/pr69625.c b/gcc/testsuite/gcc.target/s390/pr69625.c
new file mode 100644
index 0000000..f717183
--- /dev/null
+++ b/gcc/testsuite/gcc.target/s390/pr69625.c
@@ -0,0 +1,37 @@
+/* Test for PR 69625; make sure that a leaf vararg function does not overwrite
+ the caller's r6. */
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+extern void abort (void);
+
+__attribute__ ((noinline))
+int
+foo (int x, ...)
+{
+ __builtin_va_list vl;
+ int i;
+
+ __asm__ __volatile__ ("lhi %%r6,1" : : : "r6");
+ __builtin_va_start(vl, x);
+ for (i = 2; i <= 6; i++)
+ x += __builtin_va_arg(vl, int);
+ __builtin_va_end (vl);
+
+ return x;
+}
+
+__attribute__ ((noinline))
+void
+bar (int r2, int r3, int r4, int r5, int r6)
+{
+ foo (r2, r3, r4, r5, r6);
+ if (r6 != 6)
+ abort ();
+}
+
+int
+main (void)
+{
+ bar (2, 3, 4, 5, 6);
+}
--
2.3.0
