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* [gcc(refs/users/marxin/heads/backport-11)] i386: Fix emissing of __builtin_cpu_supports.
@ 2021-12-16 11:18 Martin Liska
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From: Martin Liska @ 2021-12-16 11:18 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:d4e305e4498039b921070418069a68648188b196
commit d4e305e4498039b921070418069a68648188b196
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 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 ();
}
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