i386: Fix emissing of __builtin_cpu_supports.

	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 (do that
	it mask == 31).
	For "avx512vbmi2" argument, we return now 1 << 31, which is a
	negative integer value.

(cherry picked from commit 127c7178d5ec502d95862fd823537cbca1a0cb99)

diff --git a/gcc/config/i386/i386-builtins.c b/gcc/config/i386/i386-builtins.c
index 6f6a8328ef15787f5d369dd225fce4ba70abe6d1..c24cbd5de28c494a242ddfde4df18d9bf9bd2f77 100644 (file)
--- a/gcc/config/i386/i386-builtins.c
+++ b/gcc/config/i386/i386-builtins.c
@@ -2323,7 +2323,11 @@ 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);
+      if (isa_names_table[i].feature == (INT_TYPE_SIZE - 1))
+       return build2 (NE_EXPR, integer_type_node, final,
+                      build_int_cst (unsigned_type_node, 0));
+      else
+       return build1 (CONVERT_EXPR, integer_type_node, final);
     }
   gcc_unreachable ();
 }