From 625fdf4a277e1f896b3035d7c08ea3d2fab06bfb Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 24 Oct 2026 02:19:42 +0000
Subject: [PATCH 1/2] Initial plan


From 1a898aa7cc13978ed0c36cbeb76c2ffd9d8467c6 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sun, 25 Oct 2026 18:07:53 +0000
Subject: [PATCH 2/2] Fix ARM64 GC liveness after ADRP in long address and
 constant loads

Co-authored-by: VSadov <8218165+VSadov@users.noreply.github.com>
---
 src/coreclr/jit/emitarm64.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/coreclr/jit/emitarm64.cpp b/src/coreclr/jit/emitarm64.cpp
index d519af1065641c..7eb379122fdd90 100644
--- a/src/coreclr/jit/emitarm64.cpp
+++ b/src/coreclr/jit/emitarm64.cpp
@@ -10753,6 +10753,7 @@ BYTE* emitter::emitOutputLJ(insGroup* ig, BYTE* dst, instrDesc* i)
                 ins = INS_adrp;
                 fmt = IF_DI_1E;
                 dst = emitOutputShortAddress(dst, ins, fmt, relPageAddr, addrReg);
+                emitGCregDeadUpd(addrReg, dst);
 
                 ssize_t imm12 = (ssize_t)dstAddr & 0xFFF; // 12 bits
                 assert(isValidUimm<12>(imm12));
@@ -11811,6 +11812,11 @@ size_t emitter::emitOutputInstr(insGroup* ig, instrDesc* id, BYTE** dp)
                 // Local jmp/load case
                 assert(id->idIsBound());
                 dst = emitOutputLJ(ig, dst, id);
+                if (fmt == IF_LARGEADR)
+                {
+                    // ADRP overwrites the destination before ADD computes the full address.
+                    emitGCregDeadUpd(id->idReg1(), odst + sizeof(code_t));
+                }
             }
             sz = sizeof(instrDescJmp);
             break;