[PATCH][committed] Move runtime check into a separate function and guard it with target ("no-avx")

[liuhongt]

The patch can avoid SIGILL on non-AVX512 machine due to kmovd is
generated in dynamic check.

Committed as an obvious fix.

gcc/testsuite/ChangeLog:

        PR target/115748
        * gcc.target/i386/avx512-check.h: Move runtime check into a
        separate function and guard it with target ("no-avx").
---
 gcc/testsuite/gcc.target/i386/avx512-check.h | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.target/i386/avx512-check.h 
b/gcc/testsuite/gcc.target/i386/avx512-check.h
index 0ad9064f637..71858a33dac 100644
--- a/gcc/testsuite/gcc.target/i386/avx512-check.h
+++ b/gcc/testsuite/gcc.target/i386/avx512-check.h
@@ -34,8 +34,9 @@ check_osxsave (void)
   return (ecx & bit_OSXSAVE) != 0;
 }
 
+__attribute__((noipa,target("no-avx")))
 int
-main ()
+avx512_runtime_support_p ()
 {
   unsigned int eax, ebx, ecx, edx;
 
@@ -100,6 +101,17 @@ main ()
       && (edx & bit_AVX512VP2INTERSECT)
 #endif
       && avx512f_os_support ())
+    {
+      return 1;
+    }
+
+  return 0;
+}
+
+int
+main ()
+{
+  if (avx512_runtime_support_p ())
     {
       DO_TEST ();
 #ifdef DEBUG
-- 
2.31.1