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Ip=[4.158.2.129];\n Helo=[outbound-uk1.az.dlp.m.darktrace.com]","X-MS-Exchange-CrossTenant-AuthSource":"\n DU6PEPF0000B621.eurprd02.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 <gcc-patches.gcc.gnu.org>","List-Unsubscribe":"<https://gcc.gnu.org/mailman/options/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe>","List-Archive":"<https://gcc.gnu.org/pipermail/gcc-patches/>","List-Post":"<mailto:gcc-patches@gcc.gnu.org>","List-Help":"<mailto:gcc-patches-request@gcc.gnu.org?subject=help>","List-Subscribe":"<https://gcc.gnu.org/mailman/listinfo/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe>","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"},"content":"When entering the SAVED_LOCAL state, commit the lazy save and disable\nPSTATE.ZA.\n\nI'm not sure whether this state transition is actually possible, but if\nit does occur then the previous behaviour was wrong.\n\ngcc/ChangeLog:\n\n\t* config/aarch64/aarch64.cc (aarch64_mode_emit_local_sme_state):\n\tFix INACTIVE_LOCAL -> SAVED_LOCAL handling.","diff":"diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc\nindex c91fff3ef6bab8a25391a8a0737fd8c7b0615bd5..ba73c2376a3cbb38567f36f5d3be28784e393165 100644\n--- a/gcc/config/aarch64/aarch64.cc\n+++ b/gcc/config/aarch64/aarch64.cc\n@@ -31940,7 +31940,9 @@ aarch64_mode_emit_local_sme_state (aarch64_local_sme_state mode,\n      a known mode.  */\n   gcc_assert (prev_mode != aarch64_local_sme_state::ANY);\n \n-  if (prev_mode == aarch64_local_sme_state::INACTIVE_CALLER)\n+  if (prev_mode == aarch64_local_sme_state::INACTIVE_CALLER\n+      || (prev_mode == aarch64_local_sme_state::INACTIVE_LOCAL\n+\t  && mode == aarch64_local_sme_state::SAVED_LOCAL))\n     {\n       /* Commit any uncommitted lazy save.  This leaves ZA either active\n \t and zero (lazy save case) or off (normal case).\n@@ -32116,6 +32118,12 @@ aarch64_mode_emit_local_sme_state (aarch64_local_sme_state mode,\n       /* This is a transition to an exception handler.  */\n       gcc_assert (prev_mode == aarch64_local_sme_state::OFF\n \t\t  || prev_mode == aarch64_local_sme_state::INACTIVE_LOCAL);\n+\n+      if (prev_mode == aarch64_local_sme_state::INACTIVE_LOCAL)\n+\t/* We committed the lazy save earlier, but we still need to ensure that\n+\t   ZA is disabled.  */\n+\temit_insn (gen_aarch64_smstop_za ());\n+\n       return;\n     }\n \n","prefixes":["4/7"]}