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(localhost [IPv6:::1]) by gnu-tgl-3.localdomain (Postfix) with ESMTP id DF613C0232; Thu, 19 Dec 2024 03:19:05 +0800 (CST) From: "H.J. Lu" To: libc-alpha@sourceware.org Cc: sam@gentoo.org, josmyers@redhat.com Subject: [PATCH v2] x86-64: Disable libmvec ABI test for Clang Date: Thu, 19 Dec 2024 03:19:05 +0800 Message-ID: <20241218191905.3708728-1-hjl.tools@gmail.com> X-Mailer: git-send-email 2.47.1 MIME-Version: 1.0 X-Spam-Status: No, score=-3017.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, RCVD_IN_BARRACUDACENTRAL, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libc-alpha-bounces~patchwork=sourceware.org@sourceware.org Unlike GCC, libmvec support in Clang is hard-coded. Clang doesn't use macros defined in to support new libmvec functions added to glibc. Also since Clang can't vectorize some test loops to test libmvec ABI: In file included from ../sysdeps/x86_64/fpu/test-double-libmvec-asin.c:3: ../sysdeps/x86_64/fpu/test-vector-abi-arg1.h:38:1: error: loop not vectorized: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering [-Werror,-Wpass-failed=transform-warning] 38 | #pragma omp simd | ^ 1 error generated. disable libmvec ABI test for Clang. Signed-off-by: H.J. Lu --- sysdeps/x86_64/fpu/Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sysdeps/x86_64/fpu/Makefile b/sysdeps/x86_64/fpu/Makefile index 8eb382a177..e39d31c117 100644 --- a/sysdeps/x86_64/fpu/Makefile +++ b/sysdeps/x86_64/fpu/Makefile @@ -28,6 +28,8 @@ endif ifneq ($(multi-arch),no) # Variables for libmvec tests. ifeq ($(subdir)$(build-mathvec),mathyes) +ifneq ($(have-test-clang),yes) +# NB: Clang 19 can't vectorize the test loop to test libmvec ABI. libmvec-tests += double-vlen2 double-vlen4 double-vlen4-avx2 \ float-vlen4 float-vlen8 float-vlen8-avx2 \ double-vlen8 float-vlen16 @@ -36,6 +38,7 @@ tests += \ $(libmvec-abi-func-avx-tests) \ $(libmvec-abi-func-avx2-tests) \ $(libmvec-abi-func-avx512f-tests) +endif double-vlen2-funcs = $(libmvec-funcs) double-vlen4-funcs = $(libmvec-funcs)