Re: GCC 11 backports

["Martin Liška" <mliska@suse.cz>]

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On 11/8/21 13:26, Martin Liška wrote:
> On 11/5/21 17:08, Martin Liška wrote:
>> On 8/23/21 10:54, Martin Liška wrote:
>>> On 8/16/21 13:13, Martin Liška wrote:
>>>> I'm going to apply the following 3 tested patches.
>>>>
>>>> Martin
>>>
>>> One more patch I've just tested.
>>>
>>> Martin
>>
>> And one more backport.
>>
>> Martin
> 
> One more tested patch.
> 
> Martin

And one more tested patch.

Martin

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From d4e305e4498039b921070418069a68648188b196 Mon Sep 17 00:00:00 2001
From: Martin Liska <mliska@suse.cz>
Date: Mon, 13 Dec 2021 15:34:30 +0100
Subject: [PATCH] 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)
---
 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 128bd39816c..59575aea795 100644
--- a/gcc/config/i386/i386-builtins.c
+++ b/gcc/config/i386/i386-builtins.c
@@ -2236,7 +2236,11 @@ 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 ();
 }
-- 
2.34.1