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
