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Ip=[4.158.2.129];\n Helo=[outbound-uk1.az.dlp.m.darktrace.com]","X-MS-Exchange-CrossTenant-AuthSource":"\n DB1PEPF000509FD.eurprd03.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Anonymous","X-MS-Exchange-CrossTenant-FromEntityHeader":"HybridOnPrem","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"},"content":"Also replace unspec_volatile with plain unspec - there no need to\nprevent dead code elimination if the dependencies are correct.\n\n---\n\nIf the index is 0, then movt is a destructive instruction, so it should be\npossible to remove the dependency in that case. However, that would be a more\ndisruptive chane, so we can leave it till stage 1.\n\n\ngcc/ChangeLog:\n\n\t* config/aarch64/aarch64-sme.md (aarch64_sme_write_zt): Add\n\tZTO_REGNUM use and make unspec non-volatile.\n\ngcc/testsuite/ChangeLog:\n\n\t* gcc.target/aarch64/sme/zt0_state_8.c: New test.","diff":"diff --git a/gcc/config/aarch64/aarch64-sme.md b/gcc/config/aarch64/aarch64-sme.md\nindex f24e91997fd640f82c11353dd196fe334daec630..d5564e57bdf130bb51daf5c52be5a743ab32064d 100644\n--- a/gcc/config/aarch64/aarch64-sme.md\n+++ b/gcc/config/aarch64/aarch64-sme.md\n@@ -1067,8 +1067,9 @@\n ;; __arm_streaming __arm_out (\"zt0\");\n (define_insn \"@aarch64_sme_write_zt\"\n [(set (reg:V8DI ZT0_REGNUM)\n-\t(unspec_volatile:V8DI\n-\t [(match_operand:SVE_FULL 0 \"register_operand\" \"w\")\n+\t(unspec:V8DI\n+\t [(reg:V8DI ZT0_REGNUM)\n+\t (match_operand:SVE_FULL 0 \"register_operand\" \"w\")\n \t (match_operand:DI 1 \"const_int_operand\")]\n \t UNSPEC_SME_WRITE))]\n \"TARGET_SME_LUTv2 && TARGET_STREAMING\"\ndiff --git a/gcc/testsuite/gcc.target/aarch64/sme/zt0_state_8.c b/gcc/testsuite/gcc.target/aarch64/sme/zt0_state_8.c\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..8eb3d424f539d8a645a9889f465ac9013048b5f5\n--- /dev/null\n+++ b/gcc/testsuite/gcc.target/aarch64/sme/zt0_state_8.c\n@@ -0,0 +1,14 @@\n+// { dg-options \"-O3 -fomit-frame-pointer -fno-optimize-sibling-calls\" }\n+\n+#include \n+\n+#pragma GCC target \"+sme2+sme-lutv2\"\n+\n+__arm_streaming __arm_inout(\"zt0\")\n+void foo(svfloat32_t z)\n+{\n+ svzero_zt (0);\n+ svwrite_lane_zt_f32 (0, z, 1);\n+}\n+\n+// { dg-final { scan-assembler \"zero\" } }\n","prefixes":["1/7"]}