diff --git a/js/src/jit/Ion.cpp b/js/src/jit/Ion.cpp
index 1a949fae62..8e28a93c0e 100644
--- a/js/src/jit/Ion.cpp
+++ b/js/src/jit/Ion.cpp
@@ -3341,7 +3341,9 @@ PerThreadData::setAutoFlushICache(AutoFlushICache* afc)
 void
 AutoFlushICache::setRange(uintptr_t start, size_t len)
 {
-#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || \
+    defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64) || \
+    defined(JS_CODEGEN_LOONGARCH64)
     AutoFlushICache* afc = TlsPerThreadData.get()->PerThreadData::autoFlushICache();
     MOZ_ASSERT(afc);
     MOZ_ASSERT(!afc->start_);
@@ -3374,7 +3376,8 @@ AutoFlushICache::setRange(uintptr_t start, size_t len)
 void
 AutoFlushICache::flush(uintptr_t start, size_t len)
 {
-#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_MIPS32) || \
+    defined(JS_CODEGEN_MIPS64) || defined(JS_CODEGEN_LOONGARCH64)
     PerThreadData* pt = TlsPerThreadData.get();
     AutoFlushICache* afc = pt ? pt->PerThreadData::autoFlushICache() : nullptr;
     if (!afc) {
@@ -3401,7 +3404,8 @@ AutoFlushICache::flush(uintptr_t start, size_t len)
 void
 AutoFlushICache::setInhibit()
 {
-#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_MIPS32) || \
+    defined(JS_CODEGEN_MIPS64) || defined(JS_CODEGEN_LOONGARCH64)
     AutoFlushICache* afc = TlsPerThreadData.get()->PerThreadData::autoFlushICache();
     MOZ_ASSERT(afc);
     MOZ_ASSERT(afc->start_);
@@ -3428,14 +3432,18 @@ AutoFlushICache::setInhibit()
 // the respective AutoFlushICache dynamic context.
 //
 AutoFlushICache::AutoFlushICache(const char* nonce, bool inhibit)
-#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || \
+    defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64) || \
+    defined(JS_CODEGEN_LOONGARCH64)
   : start_(0),
     stop_(0),
     name_(nonce),
     inhibit_(inhibit)
 #endif
 {
-#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || \
+    defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64) || \
+    defined(JS_CODEGEN_LOONGARCH64)
     PerThreadData* pt = TlsPerThreadData.get();
     AutoFlushICache* afc = pt->PerThreadData::autoFlushICache();
     if (afc)
@@ -3450,7 +3458,9 @@ AutoFlushICache::AutoFlushICache(const char* nonce, bool inhibit)
 
 AutoFlushICache::~AutoFlushICache()
 {
-#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || \
+    defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64) || \
+    defined(JS_CODEGEN_LOONGARCH64)
     PerThreadData* pt = TlsPerThreadData.get();
     MOZ_ASSERT(pt->PerThreadData::autoFlushICache() == this);
 
diff --git a/js/src/jit/IonCode.h b/js/src/jit/IonCode.h
index 2d9469dead..e749738c82 100644
--- a/js/src/jit/IonCode.h
+++ b/js/src/jit/IonCode.h
@@ -747,7 +747,9 @@ struct VMFunction;
 struct AutoFlushICache
 {
   private:
-#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || \
+    defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64) || \
+    defined(JS_CODEGEN_LOONGARCH64)
     uintptr_t start_;
     uintptr_t stop_;
     const char* name_;
diff --git a/js/src/jit/RegisterAllocator.h b/js/src/jit/RegisterAllocator.h
index 97333fbdca..8b5d0736a6 100644
--- a/js/src/jit/RegisterAllocator.h
+++ b/js/src/jit/RegisterAllocator.h
@@ -282,7 +282,8 @@ class RegisterAllocator
         if (mir->compilingWasm()) {
 #if defined(JS_CODEGEN_X64)
             allRegisters_.take(AnyRegister(HeapReg));
-#elif defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+#elif defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_MIPS32) || \
+      defined(JS_CODEGEN_MIPS64) || defined(JS_CODEGEN_LOONGARCH64)
             allRegisters_.take(AnyRegister(HeapReg));
             allRegisters_.take(AnyRegister(GlobalReg));
 #elif defined(JS_CODEGEN_ARM64)
diff --git a/js/src/wasm/WasmBaselineCompile.cpp b/js/src/wasm/WasmBaselineCompile.cpp
index dfb85d0f77..41eb0e76d6 100644
--- a/js/src/wasm/WasmBaselineCompile.cpp
+++ b/js/src/wasm/WasmBaselineCompile.cpp
@@ -7740,7 +7740,8 @@ BaseCompiler::BaseCompiler(const ModuleGeneratorData& mg,
     availGPR_.take(GlobalReg);
 #elif defined(JS_CODEGEN_X86)
     availGPR_.take(ScratchRegX86);
-#elif defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+#elif defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64) || \
+      defined(JS_CODEGEN_LOONGARCH64)
     availGPR_.take(HeapReg);
     availGPR_.take(GlobalReg);
 #endif
diff --git a/js/src/wasm/WasmFrameIterator.cpp b/js/src/wasm/WasmFrameIterator.cpp
index bf0de18e7b..4ba7a73b45 100644
--- a/js/src/wasm/WasmFrameIterator.cpp
+++ b/js/src/wasm/WasmFrameIterator.cpp
@@ -649,10 +649,11 @@ ProfilingFrameIterator::ProfilingFrameIterator(const WasmActivation& activation,
         MOZ_ASSERT(offsetInModule < codeRange->end());
         uint32_t offsetInCodeRange = offsetInModule - codeRange->begin();
         void** sp = (void**)state.sp;
-#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_MIPS32) || \
+    defined(JS_CODEGEN_MIPS64) || defined(JS_CODEGEN_LOONGARCH64)
         if (offsetInCodeRange < PushedRetAddr || InThunk(*codeRange, offsetInModule)) {
-            // First instruction of the ARM/MIPS function; the return address is
-            // still in lr and fp still holds the caller's fp.
+            // First instruction of the ARM/MIPS/loongarch64 function; the
+            // return address is still in lr and fp still holds the caller's fp.
             callerPC_ = state.lr;
             callerFP_ = fp;
             AssertMatchesCallSite(*activation_, callerPC_, callerFP_, sp - 2);
diff --git a/js/src/wasm/WasmModule.cpp b/js/src/wasm/WasmModule.cpp
index 69a0bdbcaa..09cd1c486b 100644
--- a/js/src/wasm/WasmModule.cpp
+++ b/js/src/wasm/WasmModule.cpp
@@ -38,8 +38,10 @@ using mozilla::IsNaN;
 
 const char wasm::InstanceExportField[] = "exports";
 
-#if defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
-// On MIPS, CodeLabels are instruction immediates so InternalLinks only
+#if defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64) || \
+    defined(JS_CODEGEN_LOONGARCH64)
+// On MIPS and loongarch64, CodeLabels are instruction immediates so
+// InternalLinks only
 // patch instruction immediates.
 LinkData::InternalLink::InternalLink(Kind kind)
 {
diff --git a/js/src/wasm/WasmStubs.cpp b/js/src/wasm/WasmStubs.cpp
index 0fa62e608c..e959227f25 100644
--- a/js/src/wasm/WasmStubs.cpp
+++ b/js/src/wasm/WasmStubs.cpp
@@ -566,11 +566,13 @@ wasm::GenerateImportInterpExit(MacroAssembler& masm, const FuncImport& fi, uint3
     MOZ_ASSERT(NonVolatileRegs.has(WasmTlsReg));
 #if defined(JS_CODEGEN_X64) || \
     defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || \
-    defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+    defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64) || \
+    defined(JS_CODEGEN_LOONGARCH64)
     MOZ_ASSERT(NonVolatileRegs.has(HeapReg));
 #endif
 #if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_ARM64) || \
-    defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
+    defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64) || \
+    defined(JS_CODEGEN_LOONGARCH64)
     MOZ_ASSERT(NonVolatileRegs.has(GlobalReg));
 #endif