i386: Test __has_attribute (__indirect_return__)

The new indirect_return attribute is intended to mark swapcontext in
<ucontext.h>.  Test __has_attribute (__indirect_return__) so that it
can be backported to GCC 8.

	PR target/86560
	* gcc.target/i386/pr86560-4.c: New test.
	* gcc.target/i386/pr86560-5.c: Likewise.
---
 gcc/testsuite/gcc.target/i386/pr86560-4.c | 21 +++++++++++++++++++++
 gcc/testsuite/gcc.target/i386/pr86560-5.c | 21 +++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 gcc/testsuite/gcc.target/i386/pr86560-4.c
 create mode 100644 gcc/testsuite/gcc.target/i386/pr86560-5.c

diff --git a/gcc/testsuite/gcc.target/i386/pr86560-4.c b/gcc/testsuite/gcc.target/i386/pr86560-4.c
new file mode 100644
index 00000000000..a623e3dcbeb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr86560-4.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fcf-protection" } */
+/* { dg-final { scan-assembler-times {\mendbr} 2 } } */
+
+struct ucontext;
+
+extern int (*bar) (struct ucontext *)
+#ifdef __has_attribute
+# if __has_attribute (indirect_return)
+  __attribute__((__indirect_return__))
+# endif
+#endif
+;
+
+extern int res;
+
+void
+foo (struct ucontext *oucp)
+{
+  res = bar (oucp);
+}
diff --git a/gcc/testsuite/gcc.target/i386/pr86560-5.c b/gcc/testsuite/gcc.target/i386/pr86560-5.c
new file mode 100644
index 00000000000..33b0f6424c2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr86560-5.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fcf-protection" } */
+/* { dg-final { scan-assembler-times {\mendbr} 2 } } */
+
+struct ucontext;
+
+extern int (*bar) (struct ucontext *)
+#ifdef __has_attribute
+# if __has_attribute (__indirect_return__)
+  __attribute__((__indirect_return__))
+# endif
+#endif
+;
+
+extern int res;
+
+void
+foo (struct ucontext *oucp)
+{
+  res = bar (oucp);
+}
--
2.17.1

From-SVN: r262878

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8c60524cdee100cc2fcd4b173be4b8e779b03903..8ffc1f3f52d2316ff8d9e59b8e84871bf9ee025f 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2018-07-19  H.J. Lu  <hongjiu.lu@intel.com>
+
+       PR target/86560
+       * gcc.target/i386/pr86560-4.c: New test.
+       * gcc.target/i386/pr86560-5.c: Likewise.
+
 2018-07-19  H.J. Lu  <hongjiu.lu@intel.com>
 
        PR target/86560

diff --git a/gcc/testsuite/gcc.target/i386/pr86560-4.c b/gcc/testsuite/gcc.target/i386/pr86560-4.c
new file mode 100644 (file)
index 0000000..a623e3d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr86560-4.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fcf-protection" } */
+/* { dg-final { scan-assembler-times {\mendbr} 2 } } */
+
+struct ucontext;
+
+extern int (*bar) (struct ucontext *)
+#ifdef __has_attribute
+# if __has_attribute (indirect_return)
+  __attribute__((__indirect_return__))
+# endif
+#endif
+;
+
+extern int res;
+
+void
+foo (struct ucontext *oucp)
+{
+  res = bar (oucp);
+}

diff --git a/gcc/testsuite/gcc.target/i386/pr86560-5.c b/gcc/testsuite/gcc.target/i386/pr86560-5.c
new file mode 100644 (file)
index 0000000..33b0f64
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr86560-5.c
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fcf-protection" } */
+/* { dg-final { scan-assembler-times {\mendbr} 2 } } */
+
+struct ucontext;
+
+extern int (*bar) (struct ucontext *)
+#ifdef __has_attribute
+# if __has_attribute (__indirect_return__)
+  __attribute__((__indirect_return__))
+# endif
+#endif
+;
+
+extern int res;
+
+void
+foo (struct ucontext *oucp)
+{
+  res = bar (oucp);
+}