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Tue, 12 Mar 2024 16:08:14 +0000 Date: Tue, 12 Mar 2024 16:08:12 +0000 From: Tamar Christina To: gcc-patches@gcc.gnu.org Cc: nd@arm.com, Richard.Earnshaw@arm.com, Marcus.Shawcroft@arm.com, Kyrylo.Tkachov@arm.com, richard.sandiford@arm.com Subject: Summary: [PATCH][committed]AArch64: Do not allow SIMD clones with simdlen 1 [PR113552][GCC 13/12/11 backport] Message-ID: Content-Disposition: inline X-ClientProxiedBy: LO4P302CA0030.GBRP302.PROD.OUTLOOK.COM (2603:10a6:600:2c1::16) To VI1PR08MB5325.eurprd08.prod.outlook.com (2603:10a6:803:13e::17) MIME-Version: 1.0 X-MS-TrafficTypeDiagnostic: VI1PR08MB5325:EE_|AM9PR08MB6179:EE_|DB5PEPF00014B90:EE_|AS2PR08MB9641:EE_ X-MS-Office365-Filtering-Correlation-Id: 2a3f3255-e05e-4ec6-1f9a-08dc42aea5d2 x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:255.255.255.255; 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The AArch64 vector PCS does not allow simd calls with simdlen 1, however due to a bug we currently do allow it for num == 0. This causes us to emit a symbol that doesn't exist and we fail to link. Bootstrapped Regtested on aarch64-none-linux-gnu and no issues. Committed to GCC 13,12,11 branches as previously approved. Thanks, Tamar gcc/ChangeLog: PR tree-optimization/113552 * config/aarch64/aarch64.cc (aarch64_simd_clone_compute_vecsize_and_simdlen): Block simdlen 1. gcc/testsuite/ChangeLog: PR tree-optimization/113552 * gcc.target/aarch64/pr113552.c: New test. * gcc.target/aarch64/simd_pcs_attribute-3.c: Remove bogus check. --- -- diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc index f546c48ae2d2bad2e34c6b72e5e3e30aba3c3bd6..d19a9c16cc97ae75afd4e29f4339d65d39cfb73a 100644 --- a/gcc/config/aarch64/aarch64.cc +++ b/gcc/config/aarch64/aarch64.cc @@ -27027,7 +27027,7 @@ aarch64_simd_clone_compute_vecsize_and_simdlen (struct cgraph_node *node, bool explicit_p) { tree t, ret_type; - unsigned int elt_bits, count; + unsigned int elt_bits, count = 0; unsigned HOST_WIDE_INT const_simdlen; poly_uint64 vec_bits; @@ -27104,7 +27104,7 @@ aarch64_simd_clone_compute_vecsize_and_simdlen (struct cgraph_node *node, vec_bits = (num == 0 ? 64 : 128); clonei->simdlen = exact_div (vec_bits, elt_bits); } - else + else if (maybe_ne (clonei->simdlen, 1U)) { count = 1; vec_bits = clonei->simdlen * elt_bits; diff --git a/gcc/testsuite/gcc.target/aarch64/pr113552.c b/gcc/testsuite/gcc.target/aarch64/pr113552.c new file mode 100644 index 0000000000000000000000000000000000000000..9c96b061ed2b4fcc57e58925277f74d14f79c51f --- /dev/null +++ b/gcc/testsuite/gcc.target/aarch64/pr113552.c @@ -0,0 +1,17 @@ +/* { dg-do compile } */ +/* { dg-options "-Ofast -march=armv8-a" } */ + +__attribute__ ((__simd__ ("notinbranch"), const)) +double cos (double); + +void foo (float *a, double *b) +{ + for (int i = 0; i < 12; i+=3) + { + b[i] = cos (5.0 * a[i]); + b[i+1] = cos (5.0 * a[i+1]); + b[i+2] = cos (5.0 * a[i+2]); + } +} + +/* { dg-final { scan-assembler-times {bl\t_ZGVnN2v_cos} 6 } } */ diff --git a/gcc/testsuite/gcc.target/aarch64/simd_pcs_attribute-3.c b/gcc/testsuite/gcc.target/aarch64/simd_pcs_attribute-3.c index 95f6a6803e889c02177ef10972962ed62d2095eb..c6dac6b104c94c9de89ed88dc5a73e185d2be125 100644 --- a/gcc/testsuite/gcc.target/aarch64/simd_pcs_attribute-3.c +++ b/gcc/testsuite/gcc.target/aarch64/simd_pcs_attribute-3.c @@ -18,7 +18,7 @@ double foo(double x) } /* { dg-final { scan-assembler-not {\.variant_pcs\tfoo} } } */ -/* { dg-final { scan-assembler-times {\.variant_pcs\t_ZGVnM1v_foo} 1 } } */ +/* { dg-final { scan-assembler-not {\.variant_pcs\t_ZGVnM1v_foo} } } */ /* { dg-final { scan-assembler-times {\.variant_pcs\t_ZGVnM2v_foo} 1 } } */ -/* { dg-final { scan-assembler-times {\.variant_pcs\t_ZGVnN1v_foo} 1 } } */ +/* { dg-final { scan-assembler-not {\.variant_pcs\t_ZGVnN1v_foo} } } */ /* { dg-final { scan-assembler-times {\.variant_pcs\t_ZGVnN2v_foo} 1 } } */