[PATCH] i386: Fix emissing of __builtin_cpu_supports.

["Martin Liška" <mliska@suse.cz>]

The patch fixes __builtin_cpu_supports("avx512vbmi2") which returns a negative
value (that's not allowed in the documentation).

I also checked ppc target that does the same, and __builtin_cpu_is, which
are fine.

Patch can bootstrap on x86_64-linux-gnu and survives regression tests.

Ready to be installed?
Thanks,
Martin	

	PR target/103661

gcc/ChangeLog:

	* config/i386/i386-builtins.c (fold_builtin_cpu): Compare to 0
	as API expects that non-zero values are returned.  For
	"avx512vbmi2" argument, we return now 1 << 31, which is a
	negative integer value.
---
  gcc/config/i386/i386-builtins.c | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/config/i386/i386-builtins.c b/gcc/config/i386/i386-builtins.c
index 0fb14b55712..7e57b665c1e 100644
--- a/gcc/config/i386/i386-builtins.c
+++ b/gcc/config/i386/i386-builtins.c
@@ -2353,7 +2353,8 @@ fold_builtin_cpu (tree fndecl, tree *args)
        /* Return __cpu_model.__cpu_features[0] & field_val  */
        final = build2 (BIT_AND_EXPR, unsigned_type_node, array_elt,
  		      build_int_cstu (unsigned_type_node, field_val));
-      return build1 (CONVERT_EXPR, integer_type_node, final);
+      return build2 (NE_EXPR, integer_type_node, final,
+		     build_int_cst (unsigned_type_node, 0));
      }
    gcc_unreachable ();
  }
-- 
2.34.1