[gcc r12-814] rs6000: Add ROP tests

[gcc r12-814] rs6000: Add ROP tests

[William Schmidt]

https://gcc.gnu.org/g:5bd66c6826e5f3a38ba393702923feb88959f845

commit r12-814-g5bd66c6826e5f3a38ba393702923feb88959f845
Author: Bill Schmidt <wschmidt@linux.ibm.com>
Date:   Thu May 13 13:33:35 2021 -0500

    rs6000: Add ROP tests
    
    2021-05-13  Bill Schmidt  <wschmidt@linux.ibm.com>
    
    gcc/testsuite/
            * gcc.target/powerpc/rop-1.c: New.
            * gcc.target/powerpc/rop-2.c: New.
            * gcc.target/powerpc/rop-3.c: New.
            * gcc.target/powerpc/rop-4.c: New.
            * gcc.target/powerpc/rop-5.c: New.

Diff:
---
 gcc/testsuite/gcc.target/powerpc/rop-1.c | 17 +++++++++++++++++
 gcc/testsuite/gcc.target/powerpc/rop-2.c | 17 +++++++++++++++++
 gcc/testsuite/gcc.target/powerpc/rop-3.c | 18 ++++++++++++++++++
 gcc/testsuite/gcc.target/powerpc/rop-4.c | 15 +++++++++++++++
 gcc/testsuite/gcc.target/powerpc/rop-5.c | 13 +++++++++++++
 5 files changed, 80 insertions(+)

diff --git a/gcc/testsuite/gcc.target/powerpc/rop-1.c b/gcc/testsuite/gcc.target/powerpc/rop-1.c
new file mode 100644
index 00000000000..8cedcb6668a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/rop-1.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mdejagnu-cpu=power10 -mrop-protect" } */
+/* { dg-require-effective-target powerpc_elfv2 } */
+
+/* Verify that ROP-protect instructions are inserted when a
+   call is present.  */
+
+extern void foo (void);
+
+int bar ()
+{
+  foo ();
+  return 5;
+}
+
+/* { dg-final { scan-assembler-times {\mhashst\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mhashchk\M} 1 } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/rop-2.c b/gcc/testsuite/gcc.target/powerpc/rop-2.c
new file mode 100644
index 00000000000..c556952aec1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/rop-2.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mdejagnu-cpu=power10 -mrop-protect -mprivileged" } */
+/* { dg-require-effective-target powerpc_elfv2 } */
+
+/* Verify that privileged ROP-protect instructions are inserted when a
+   call is present.  */
+
+extern void foo (void);
+
+int bar ()
+{
+  foo ();
+  return 5;
+}
+
+/* { dg-final { scan-assembler-times {\mhashstp\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mhashchkp\M} 1 } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/rop-3.c b/gcc/testsuite/gcc.target/powerpc/rop-3.c
new file mode 100644
index 00000000000..8d03792e3e5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/rop-3.c
@@ -0,0 +1,18 @@
+/* { dg-do run { target { power10_hw } } } */
+/* { dg-require-effective-target powerpc_elfv2 } */
+/* { dg-options "-O2 -mdejagnu-cpu=power10 -mrop-protect" } */
+
+/* Verify that ROP-protect instructions execute correctly when a
+   call is present.  */
+
+void __attribute__((noipa)) foo ()
+{
+  asm ("");
+}
+
+int main ()
+{
+  foo ();
+  return 0;
+}
+
diff --git a/gcc/testsuite/gcc.target/powerpc/rop-4.c b/gcc/testsuite/gcc.target/powerpc/rop-4.c
new file mode 100644
index 00000000000..dcf47c63fb7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/rop-4.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mdejagnu-cpu=power10 -mrop-protect" } */
+/* { dg-require-effective-target powerpc_elfv2 } */
+
+/* Verify that no ROP-protect instructions are inserted when no
+   call is present.  */
+
+
+int bar ()
+{
+  return 5;
+}
+
+/* { dg-final { scan-assembler-not {\mhashst\M} } } */
+/* { dg-final { scan-assembler-not {\mhashchk\M} } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/rop-5.c b/gcc/testsuite/gcc.target/powerpc/rop-5.c
new file mode 100644
index 00000000000..cf04ea90eeb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/rop-5.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mdejagnu-cpu=power10 -mrop-protect" } */
+
+/* Verify that __ROP_PROTECT__ is predefined for -mrop-protect.  */
+
+int foo ()
+{
+#ifndef __ROP_PROTECT__
+  __ROP_PROTECT__ macro is not defined when it should be
+#endif
+  return 0;
+}
+