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From: Martin Liska <marxin@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/marxin/heads/backport-10)] i386: Fix emissing of __builtin_cpu_supports. Date: Thu, 16 Dec 2021 11:48:31 +0000 (GMT) [thread overview] Message-ID: <20211216114831.440CE3858404@sourceware.org> (raw) https://gcc.gnu.org/g:972a7d520d024d060b56a062be485b618f6456de commit 972a7d520d024d060b56a062be485b618f6456de Author: Martin Liska <mliska@suse.cz> Date: Mon Dec 13 15:34:30 2021 +0100 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: --- gcc/config/i386/i386-builtins.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/gcc/config/i386/i386-builtins.c b/gcc/config/i386/i386-builtins.c index 6f6a8328ef1..c24cbd5de28 100644 --- 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 (); }
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