diff --git a/platforms/artic/intrinsics_thorin.impala b/platforms/artic/intrinsics_thorin.impala
index 93d28e60..fa627426 100644
--- a/platforms/artic/intrinsics_thorin.impala
+++ b/platforms/artic/intrinsics_thorin.impala
@@ -12,11 +12,12 @@
 #[import(cc = "thorin")] fn cmpxchg_weak[T](_addr: &mut T, _cmp: T, _new: T, _success_order: u32, _failure_order: u32, _scope: &[u8]) -> (T, bool); // only for integer data types
 #[import(cc = "thorin")] fn fence(_order: u32, _scope: &[u8]) -> ();
 #[import(cc = "thorin")] fn pe_info[T](_src: &[u8], _val: T) -> ();
-#[import(cc = "thorin")] fn cuda(_dev: i32, _grid: (i32, i32, i32), _block: (i32, i32, i32), _body: fn() -> ()) -> ();
-#[import(cc = "thorin")] fn nvvm(_dev: i32, _grid: (i32, i32, i32), _block: (i32, i32, i32), _body: fn() -> ()) -> ();
-#[import(cc = "thorin")] fn opencl(_dev: i32, _grid: (i32, i32, i32), _block: (i32, i32, i32), _body: fn() -> ()) -> ();
-#[import(cc = "thorin")] fn amdgpu_hsa(_dev: i32, _grid: (i32, i32, i32), _block: (i32, i32, i32), _body: fn() -> ()) -> ();
-#[import(cc = "thorin")] fn amdgpu_pal(_dev: i32, _grid: (i32, i32, i32), _block: (i32, i32, i32), _body: fn() -> ()) -> ();
+#[import(cc = "thorin", name = "cuda")] fn cuda_with_lmem(_dev: i32, _grid: (i32, i32, i32), _block: (i32, i32, i32), i32, _body: fn() -> ()) -> ();
+#[import(cc = "thorin", name = "nvvm")] fn nvvm_with_lmem(_dev: i32, _grid: (i32, i32, i32), _block: (i32, i32, i32), i32, _body: fn() -> ()) -> ();
+#[import(cc = "thorin", name = "opencl")] fn opencl_with_lmem(_dev: i32, _grid: (i32, i32, i32), _block: (i32, i32, i32), i32, _body: fn() -> ()) -> ();
+#[import(cc = "thorin", name = "amdgpu_hsa")] fn amdgpu_hsa_with_lmem(_dev: i32, _grid: (i32, i32, i32), _block: (i32, i32, i32), i32, _body: fn() -> ()) -> ();
+#[import(cc = "thorin", name = "amdgpu_pal")] fn amdgpu_pal_with_lmem(_dev: i32, _grid: (i32, i32, i32), _block: (i32, i32, i32), i32, _body: fn() -> ()) -> ();
+#[import(cc = "thorin")] fn local_memory_base() -> &mut addrspace(3)[u8];
 #[import(cc = "thorin")] fn reserve_shared[T](_size: i32) -> &mut addrspace(3)[T];
 #[import(cc = "thorin")] fn hls(_dev: i32, _body: fn() -> ()) -> ();
 #[import(cc = "thorin", name = "pipeline")] fn thorin_pipeline(_initiation_interval: i32, _lower: i32, _upper: i32, _body: fn(i32) -> ()) -> (); // only for HLS/OpenCL backend
@@ -36,6 +37,12 @@
 #[import(cc = "thorin", name = "cmpxchg_weak")] fn cmpxchg_weak_p1[T](_addr: &mut addrspace(1)T, _cmp: T, _new: T, _success_order: u32, _failure_order: u32, _scope: &[u8]) -> (T, bool);
 #[import(cc = "thorin", name = "cmpxchg_weak")] fn cmpxchg_weak_p3[T](_addr: &mut addrspace(3)T, _cmp: T, _new: T, _success_order: u32, _failure_order: u32, _scope: &[u8]) -> (T, bool);
 
+fn @cuda(dev: i32, grid: (i32, i32, i32), block: (i32, i32, i32), body: fn() -> ()) = cuda_with_lmem(dev, grid, block, 0, body);
+fn @nvvm(dev: i32, grid: (i32, i32, i32), block: (i32, i32, i32), body: fn() -> ()) = nvvm_with_lmem(dev, grid, block, 0, body);
+fn @opencl(dev: i32, grid: (i32, i32, i32), block: (i32, i32, i32), body: fn() -> ()) = opencl_with_lmem(dev, grid, block, 0, body);
+fn @amdgpu_hsa(dev: i32, grid: (i32, i32, i32), block: (i32, i32, i32), body: fn() -> ()) = amdgpu_hsa_with_lmem(dev, grid, block, 0, body);
+fn @amdgpu_pal(dev: i32, grid: (i32, i32, i32), block: (i32, i32, i32), body: fn() -> ()) = amdgpu_pal_with_lmem(dev, grid, block, 0, body);
+
 fn @pipeline(body: fn(i32) -> ()) = @|initiation_interval: i32, lower: i32, upper: i32| thorin_pipeline(initiation_interval, lower, upper, body);
 fn @parallel(body: fn(i32) -> ()) = @|num_threads: i32, lower: i32, upper: i32| thorin_parallel(num_threads, lower, upper, body);
 fn @spawn(body: fn() -> ()) = @|| thorin_spawn(body);
diff --git a/platforms/impala/intrinsics_thorin.impala b/platforms/impala/intrinsics_thorin.impala
index d83079db..c7a4c0af 100644
--- a/platforms/impala/intrinsics_thorin.impala
+++ b/platforms/impala/intrinsics_thorin.impala
@@ -10,10 +10,12 @@ extern "thorin" {
     fn insert[T, U](T, i32, U) -> T;
     //fn shuffle[T](T, T, T) -> T;
 
-    fn cuda(i32, (i32, i32, i32), (i32, i32, i32), fn() -> ()) -> ();
-    fn nvvm(i32, (i32, i32, i32), (i32, i32, i32), fn() -> ()) -> ();
-    fn opencl(i32, (i32, i32, i32), (i32, i32, i32), fn() -> ()) -> ();
-    fn amdgpu(i32, (i32, i32, i32), (i32, i32, i32), fn() -> ()) -> ();
+    fn "cuda" cuda_with_lmem(i32, (i32, i32, i32), (i32, i32, i32), i32, fn() -> ()) -> ();
+    fn "nvvm" nvvm_with_lmem(i32, (i32, i32, i32), (i32, i32, i32), i32, fn() -> ()) -> ();
+    fn "opencl" opencl_with_lmem(i32, (i32, i32, i32), (i32, i32, i32), i32, fn() -> ()) -> ();
+    fn "amdgpu_hsa" amdgpu_hsa_with_lmem(i32, (i32, i32, i32), (i32, i32, i32), i32, fn() -> ()) -> ();
+    fn "amdgpu_pal" amdgpu_pal_with_lmem(i32, (i32, i32, i32), (i32, i32, i32), i32, fn() -> ()) -> ();
+    fn local_memory_base() -> &mut[3][u8];
     fn reserve_shared[T](i32) -> &mut[3][T];
 
     fn hls(dev: i32, body: fn() -> ()) -> ();
@@ -42,3 +44,9 @@ extern "thorin" {
 
     fn vectorize(vector_length: i32, body: fn(i32) -> ()) -> ();
 }
+
+fn @cuda(dev: i32, grid: (i32, i32, i32), block: (i32, i32, i32), body: fn() -> ()) { cuda_with_lmem(dev, grid, block, 0, body) }
+fn @nvvm(dev: i32, grid: (i32, i32, i32), block: (i32, i32, i32), body: fn() -> ()) { nvvm_with_lmem(dev, grid, block, 0, body) }
+fn @opencl(dev: i32, grid: (i32, i32, i32), block: (i32, i32, i32), body: fn() -> ()) { opencl_with_lmem(dev, grid, block, 0, body) }
+fn @amdgpu_hsa(dev: i32, grid: (i32, i32, i32), block: (i32, i32, i32), body: fn() -> ()) { amdgpu_hsa_with_lmem(dev, grid, block, 0, body) }
+fn @amdgpu_pal(dev: i32, grid: (i32, i32, i32), block: (i32, i32, i32), body: fn() -> ()) { amdgpu_pal_with_lmem(dev, grid, block, 0, body) }
diff --git a/src/anydsl_runtime.cpp b/src/anydsl_runtime.cpp
index e369f1bc..a4bf6252 100644
--- a/src/anydsl_runtime.cpp
+++ b/src/anydsl_runtime.cpp
@@ -118,6 +118,7 @@ void anydsl_copy(
 void anydsl_launch_kernel(
     int32_t mask, const char* file_name, const char* kernel_name,
     const uint32_t* grid, const uint32_t* block,
+    uint32_t lmem,
     void** arg_data,
     const uint32_t* arg_sizes,
     const uint32_t* arg_aligns,
@@ -129,6 +130,7 @@ void anydsl_launch_kernel(
         kernel_name,
         grid,
         block,
+        lmem,
         {
             arg_data,
             arg_sizes,
diff --git a/src/anydsl_runtime.h b/src/anydsl_runtime.h
index 0f3d331e..2b9dc71e 100644
--- a/src/anydsl_runtime.h
+++ b/src/anydsl_runtime.h
@@ -37,6 +37,7 @@ AnyDSL_runtime_API void anydsl_copy(int32_t, const void*, int64_t, int32_t, void
 AnyDSL_runtime_API void anydsl_launch_kernel(
     int32_t, const char*, const char*,
     const uint32_t*, const uint32_t*,
+    uint32_t,
     void**, const uint32_t*, const uint32_t*, const uint32_t*, const uint8_t*,
     uint32_t);
 AnyDSL_runtime_API void anydsl_synchronize(int32_t);
diff --git a/src/cuda_platform.cpp b/src/cuda_platform.cpp
index 32d9e7e1..cd2c245b 100644
--- a/src/cuda_platform.cpp
+++ b/src/cuda_platform.cpp
@@ -217,7 +217,9 @@ void CudaPlatform::launch_kernel(DeviceId dev, const LaunchParams& launch_params
         launch_params.grid[1] / launch_params.block[1],
         launch_params.grid[2] / launch_params.block[2],
         launch_params.block[0], launch_params.block[1], launch_params.block[2],
-        0, nullptr, launch_params.args.data, nullptr);
+        launch_params.lmem,
+        nullptr,
+        launch_params.args.data, nullptr);
     CHECK_CUDA(err, "cuLaunchKernel()");
 
     if (runtime_->profiling_enabled()) {
diff --git a/src/hsa_platform.cpp b/src/hsa_platform.cpp
index 5f68d1c9..c7c7ed70 100644
--- a/src/hsa_platform.cpp
+++ b/src/hsa_platform.cpp
@@ -409,7 +409,7 @@ void HSAPlatform::launch_kernel(DeviceId dev, const LaunchParams& launch_params)
     aql.kernel_object        = kernel_info.kernel;
     aql.kernarg_address      = kernel_info.kernarg_segment;
     aql.private_segment_size = kernel_info.private_segment_size;
-    aql.group_segment_size   = kernel_info.group_segment_size;
+    aql.group_segment_size   = (kernel_info.group_segment_size + 15) / 16 * kernel_info.group_segment_size + launch_params.lmem;
 
     // write to command queue
     const uint64_t index = hsa_queue_load_write_index_relaxed(queue);
diff --git a/src/opencl_platform.cpp b/src/opencl_platform.cpp
index 2b9d59ec..ef6ae0bc 100644
--- a/src/opencl_platform.cpp
+++ b/src/opencl_platform.cpp
@@ -375,7 +375,8 @@ void OpenCLPlatform::launch_kernel(DeviceId dev, const LaunchParams& launch_para
             cl_mem struct_buf = clCreateBuffer(devices_[dev].ctx, flags, launch_params.args.sizes[i], launch_params.args.data[i], &err);
             CHECK_OPENCL(err, "clCreateBuffer()");
             kernel_structs[i] = struct_buf;
-            clSetKernelArg(kernel, i, sizeof(cl_mem), &kernel_structs[i]);
+            err = clSetKernelArg(kernel, i, sizeof(cl_mem), &kernel_structs[i]);
+            CHECK_OPENCL(err, "clSetKernelArg()");
         } else {
             #ifdef CL_VERSION_2_0
             if (launch_params.args.types[i] == KernelArgType::Ptr && devices_[dev].version_major == 2) {
@@ -391,6 +392,11 @@ void OpenCLPlatform::launch_kernel(DeviceId dev, const LaunchParams& launch_para
         }
     }
 
+    if (launch_params.lmem != 0) {
+        cl_int err = clSetKernelArg(kernel, launch_params.num_args, launch_params.lmem, nullptr);
+        CHECK_OPENCL(err, "clSetKernelArg()");
+    }
+
     size_t global_work_size[] = {launch_params.grid [0], launch_params.grid [1], launch_params.grid [2]};
     size_t local_work_size[]  = {launch_params.block[0], launch_params.block[1], launch_params.block[2]};
 
diff --git a/src/pal_platform.cpp b/src/pal_platform.cpp
index 98962d42..d154cdce 100644
--- a/src/pal_platform.cpp
+++ b/src/pal_platform.cpp
@@ -215,6 +215,7 @@ void PALPlatform::launch_kernel(DeviceId dev, const LaunchParams& launch_params)
     Pal::PipelineBindParams params = {};
     params.pipelineBindPoint = Pal::PipelineBindPoint::Compute;
     params.pPipeline = pipeline;
+    params.cs.ldsBytesPerTg = launch_params.lmem;  // TODO: add static LDS size
 
     constexpr Pal::HwPipePoint pipe_point = Pal::HwPipePostCs;
     Pal::BarrierInfo barrier_info = {};
diff --git a/src/runtime.h b/src/runtime.h
index a9af9891..79a9731a 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -35,6 +35,7 @@ struct LaunchParams {
     const char* kernel_name;
     const uint32_t* grid;
     const uint32_t* block;
+    uint32_t lmem;
     ParamsArgs args;
     uint32_t num_args;
 };