diff --git a/main/llvm16/APKBUILD b/main/llvm16/APKBUILD
index 0091a8c51ea7..99dac3dff6e6 100644
--- a/main/llvm16/APKBUILD
+++ b/main/llvm16/APKBUILD
@@ -37,6 +37,7 @@ source="https://github.com/llvm/llvm-project/releases/download/llvmorg-$pkgver/l
 	9003-LV-Add-test-where-pointer-is-incorrectly-marked-as-u.patch
 	9004-LV-Don-t-consider-pointer-as-uniform-if-it-is-also-s.patch
 	9011-AArch64CompressJumpTables-prevent-over-compression.patch
+	LoongArch-Assume-no-op-addrspacecasts-by-default.patch
 	"
 builddir="$srcdir/$_pkgname-project-$pkgver.src"
 
@@ -357,4 +358,5 @@ ed07e007536bd9be62098123bee69e19569084d8070a6582b2a55c951d394239c1d2e9d93238a1a4
 92284100281c3384de1d5aa859feed418e5c94cdb9eeb4c8b3286095d0524023d50359648c2bbc547b2c2b8ce3629faed34472190d5d313e3ed746a05db2f73c  9003-LV-Add-test-where-pointer-is-incorrectly-marked-as-u.patch
 2b5ee9088124f9cbea08943392027f525f981b788e60606067c0731caed08ae8f946eed5844f1b23c94a765ed1397951d3080c7a249dc9a8341d4eedbb60544b  9004-LV-Don-t-consider-pointer-as-uniform-if-it-is-also-s.patch
 6881a8a49e12f2d168ffac188dbc8beca04756e28856591b71dd7e8695b633e54341d9b7b3c9858106b6917d80a3d4dae24442b323488b73edf2c301254fb52a  9011-AArch64CompressJumpTables-prevent-over-compression.patch
+f84c89577225c8c9c7feefe7e0ee446834421c4e222069800bac425d21699393330f29b5567e4e8ef2ee9925b5de89b67fa31abddcf930f7abe03b9403cb6968  LoongArch-Assume-no-op-addrspacecasts-by-default.patch
 "
diff --git a/main/llvm16/LoongArch-Assume-no-op-addrspacecasts-by-default.patch b/main/llvm16/LoongArch-Assume-no-op-addrspacecasts-by-default.patch
new file mode 100644
index 000000000000..ee912eb1e104
--- /dev/null
+++ b/main/llvm16/LoongArch-Assume-no-op-addrspacecasts-by-default.patch
@@ -0,0 +1,84 @@
+From 525b1a631e3d858df1cf5e9e64dace666dc851bb Mon Sep 17 00:00:00 2001
+From: WANG Rui <wangrui@loongson.cn>
+Date: Tue, 20 Feb 2024 17:41:36 +0800
+Subject: [PATCH] [LoongArch] Assume no-op addrspacecasts by default
+
+Fixes #82330
+---
+ .../Target/LoongArch/LoongArchTargetMachine.h |  5 ++
+ llvm/test/CodeGen/LoongArch/addrspacecast.ll  | 47 +++++++++++++++++++
+ 2 files changed, 52 insertions(+)
+ create mode 100644 llvm/test/CodeGen/LoongArch/addrspacecast.ll
+
+diff --git a/llvm/lib/Target/LoongArch/LoongArchTargetMachine.h b/llvm/lib/Target/LoongArch/LoongArchTargetMachine.h
+index 7d39d47e86b3..fa9bc7608e7d 100644
+--- a/llvm/lib/Target/LoongArch/LoongArchTargetMachine.h
++++ b/llvm/lib/Target/LoongArch/LoongArchTargetMachine.h
+@@ -45,6 +45,11 @@ public:
+   MachineFunctionInfo *
+   createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                             const TargetSubtargetInfo *STI) const override;
++
++  // Addrspacecasts are always noops.
++  bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
++    return true;
++  }
+ };
+ 
+ } // end namespace llvm
+diff --git a/llvm/test/CodeGen/LoongArch/addrspacecast.ll b/llvm/test/CodeGen/LoongArch/addrspacecast.ll
+new file mode 100644
+index 000000000000..2b90f32d0297
+--- /dev/null
++++ b/llvm/test/CodeGen/LoongArch/addrspacecast.ll
+@@ -0,0 +1,47 @@
++; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
++; RUN: llc -mtriple=loongarch32 -verify-machineinstrs < %s | FileCheck %s --check-prefix=LA32
++; RUN: llc -mtriple=loongarch64 -verify-machineinstrs < %s | FileCheck %s --check-prefix=LA64
++
++define void @cast0(ptr addrspace(1) %ptr) {
++; LA32-LABEL: cast0:
++; LA32:       # %bb.0:
++; LA32-NEXT:    st.w $zero, $a0, 0
++; LA32-NEXT:    ret
++;
++; LA64-LABEL: cast0:
++; LA64:       # %bb.0:
++; LA64-NEXT:    st.w $zero, $a0, 0
++; LA64-NEXT:    ret
++  %ptr0 = addrspacecast ptr addrspace(1) %ptr to ptr addrspace(0)
++  store i32 0, ptr %ptr0
++  ret void
++}
++
++define void @cast1(ptr %ptr) {
++; LA32-LABEL: cast1:
++; LA32:       # %bb.0:
++; LA32-NEXT:    addi.w $sp, $sp, -16
++; LA32-NEXT:    .cfi_def_cfa_offset 16
++; LA32-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
++; LA32-NEXT:    .cfi_offset 1, -4
++; LA32-NEXT:    bl %plt(foo)
++; LA32-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
++; LA32-NEXT:    addi.w $sp, $sp, 16
++; LA32-NEXT:    ret
++;
++; LA64-LABEL: cast1:
++; LA64:       # %bb.0:
++; LA64-NEXT:    addi.d $sp, $sp, -16
++; LA64-NEXT:    .cfi_def_cfa_offset 16
++; LA64-NEXT:    st.d $ra, $sp, 8 # 8-byte Folded Spill
++; LA64-NEXT:    .cfi_offset 1, -8
++; LA64-NEXT:    bl %plt(foo)
++; LA64-NEXT:    ld.d $ra, $sp, 8 # 8-byte Folded Reload
++; LA64-NEXT:    addi.d $sp, $sp, 16
++; LA64-NEXT:    ret
++  %castptr = addrspacecast ptr %ptr to ptr addrspace(10)
++  call void @foo(ptr addrspace(10) %castptr)
++  ret void
++}
++
++declare void @foo(ptr addrspace(10))
+-- 
+2.27.0
+