[PATCH v2 05/21] aarch64: Add __builtin_aarch64_chkfeat tests

[Yury Khrustalev]

From: Szabolcs Nagy <szabolcs.n...@arm.com>

gcc/testsuite/ChangeLog:

        * gcc.target/aarch64/chkfeat-1.c: New test.
        * gcc.target/aarch64/chkfeat-2.c: New test.
        Co-authored-by: Richard Sandiford <richard.sandif...@arm.com>
---
 gcc/testsuite/gcc.target/aarch64/chkfeat-1.c | 75 ++++++++++++++++++++
 gcc/testsuite/gcc.target/aarch64/chkfeat-2.c | 30 ++++++++
 2 files changed, 105 insertions(+)
 create mode 100644 gcc/testsuite/gcc.target/aarch64/chkfeat-1.c
 create mode 100644 gcc/testsuite/gcc.target/aarch64/chkfeat-2.c

diff --git a/gcc/testsuite/gcc.target/aarch64/chkfeat-1.c 
b/gcc/testsuite/gcc.target/aarch64/chkfeat-1.c
new file mode 100644
index 00000000000..2fae81e740f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/chkfeat-1.c
@@ -0,0 +1,75 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mbranch-protection=none" } */
+/* { dg-final { check-function-bodies "**" "" "" } } */
+
+/*
+**foo1:
+**     mov     x16, 1
+**     hint    40 // chkfeat x16
+**     mov     x0, x16
+**     ret
+*/
+unsigned long long
+foo1 (void)
+{
+  return __builtin_aarch64_chkfeat (1);
+}
+
+/*
+**foo2:
+**     mov     x16, 1
+**     movk    x16, 0x5678, lsl 32
+**     movk    x16, 0x1234, lsl 48
+**     hint    40 // chkfeat x16
+**     mov     x0, x16
+**     ret
+*/
+unsigned long long
+foo2 (void)
+{
+  return __builtin_aarch64_chkfeat (0x1234567800000001);
+}
+
+/*
+**foo3:
+**     mov     x16, x0
+**     hint    40 // chkfeat x16
+**     mov     x0, x16
+**     ret
+*/
+unsigned long long
+foo3 (unsigned long long x)
+{
+  return __builtin_aarch64_chkfeat (x);
+}
+
+/*
+**foo4:
+**     ldr     x16, \[x0\]
+**     hint    40 // chkfeat x16
+**     str     x16, \[x0\]
+**     ret
+*/
+void
+foo4 (unsigned long long *p)
+{
+  *p = __builtin_aarch64_chkfeat (*p);
+}
+
+/*
+**foo5:
+**     mov     x16, 1
+**     hint    40 // chkfeat x16
+**     cmp     x16, 0
+**(
+**     csel    w0, w1, w0, eq
+**|
+**     csel    w0, w0, w1, ne
+**)
+**     ret
+*/
+int
+foo5 (int x, int y)
+{
+  return __builtin_aarch64_chkfeat (1) ? x : y;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/chkfeat-2.c 
b/gcc/testsuite/gcc.target/aarch64/chkfeat-2.c
new file mode 100644
index 00000000000..f98d7096ffd
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/chkfeat-2.c
@@ -0,0 +1,30 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+/* { dg-final { check-function-bodies "**" "" "" } } */
+
+void bar (void);
+
+/* Extern call may change enabled HW features.  */
+
+/*
+** foo:
+**     ...
+**     mov     x16, 1
+**     ...
+**     hint    40 // chkfeat x16
+**     ...
+**     bl      bar
+**     ...
+**     mov     x16, 1
+**     ...
+**     hint    40 // chkfeat x16
+**     ...
+*/
+unsigned long long
+foo (void)
+{
+  unsigned long long a = __builtin_aarch64_chkfeat (1);
+  bar ();
+  unsigned long long b = __builtin_aarch64_chkfeat (1);
+  return a + b;
+}
-- 
2.39.5