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i386: Fix emissing of __builtin_cpu_supports.

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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.
This commit is contained in:
Martin Liska 2021-12-13 15:34:30 +01:00
parent c0e34451ae
commit 127c7178d5
1 changed files with 5 additions and 1 deletions
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6
gcc/config/i386/i386-builtins.c
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@ -2353,7 +2353,11 @@ 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 ();
}