diff --git a/Cargo.lock b/Cargo.lock
index 3f883dd..cabec9f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2565,7 +2565,6 @@ dependencies = [
  "ptx_parser",
  "quick-error",
  "rustc-hash 2.0.0",
- "serde",
  "smallvec",
  "strum 0.26.3",
  "strum_macros 0.26.4",
diff --git a/comgr/src/lib.rs b/comgr/src/lib.rs
index 9c5671b..8ba0a87 100644
--- a/comgr/src/lib.rs
+++ b/comgr/src/lib.rs
@@ -237,8 +237,8 @@ pub fn compile_bitcode(
     ]
     .into_iter();
     let opt_options = if cfg!(debug_assertions) {
-        //[c"-g", c"-mllvm", c"-print-before-all", c"", c""]
-        [c"-g", c"", c"", c"", c""]
+        //[c"-g", c"-mamdgpu-precise-memory-op", c"-mllvm", c"-print-before-all", c""]
+        [c"-g", c"-mamdgpu-precise-memory-op", c"", c"", c""]
     } else {
         [
             c"-g0",
diff --git a/ptx/Cargo.toml b/ptx/Cargo.toml
index c9a5a6b..7ee6e43 100644
--- a/ptx/Cargo.toml
+++ b/ptx/Cargo.toml
@@ -22,7 +22,6 @@ microlp = "0.2.11"
 int-enum = "1.1"
 unwrap_or = "1.0.1"
 smallvec = "1.15.1"
-serde = { version = "1.0.219", features = ["derive"] }
 
 [dev-dependencies]
 hip_runtime-sys = { path = "../ext/hip_runtime-sys" }
diff --git a/ptx/src/pass/llvm/emit.rs b/ptx/src/pass/llvm/emit.rs
index c811a53..baaff6a 100644
--- a/ptx/src/pass/llvm/emit.rs
+++ b/ptx/src/pass/llvm/emit.rs
@@ -153,6 +153,9 @@ impl<'a, 'input> ModuleEmitContext<'a, 'input> {
         for (i, param) in method.input_arguments.iter().enumerate() {
             let value = unsafe { LLVMGetParam(fn_, i as u32) };
             let name = self.resolver.get_or_add(param.name);
+            if let Some(align) = param.align {
+                unsafe { LLVMSetParamAlignment(value, align) };
+            }
             unsafe { LLVMSetValueName2(value, name.as_ptr().cast(), name.len()) };
             self.resolver.register(param.name, value);
             if method.is_kernel {
diff --git a/ptx/src/pass/mod.rs b/ptx/src/pass/mod.rs
index 0b9ef79..4f87dc3 100644
--- a/ptx/src/pass/mod.rs
+++ b/ptx/src/pass/mod.rs
@@ -51,7 +51,7 @@ quick_error! {
 }
 
 /// GPU attributes needed at compile time.
-#[derive(serde::Serialize)]
+#[derive(Copy, Clone)]
 pub struct Attributes {
     /// Clock frequency in kHz.
     pub clock_rate: u32,
diff --git a/zluda/src/impl/hipfix.rs b/zluda/src/impl/hipfix.rs
new file mode 100644
index 0000000..f957849
--- /dev/null
+++ b/zluda/src/impl/hipfix.rs
@@ -0,0 +1,12 @@
+// There's a bug in hipDrvPointerGetAttributes where it returns
+// HIP_ERROR_INVALID_VALUE if the pointer is null. It works correctly for any
+// other invalid pointer
+pub(crate) fn get_attributes(
+    ptr: hip_runtime_sys::hipDeviceptr_t,
+) -> hip_runtime_sys::hipDeviceptr_t {
+    if ptr.0.is_null() {
+        hip_runtime_sys::hipDeviceptr_t(usize::MAX as _)
+    } else {
+        ptr
+    }
+}
diff --git a/zluda/src/impl/mod.rs b/zluda/src/impl/mod.rs
index f73a972..60ecb80 100644
--- a/zluda/src/impl/mod.rs
+++ b/zluda/src/impl/mod.rs
@@ -7,6 +7,7 @@ pub(super) mod driver;
 pub(super) mod event;
 pub(super) mod function;
 pub(super) mod graph;
+pub(super) mod hipfix;
 pub(super) mod kernel;
 pub(super) mod library;
 pub(super) mod memory;
diff --git a/zluda/src/impl/module.rs b/zluda/src/impl/module.rs
index 506f824..669fe1f 100644
--- a/zluda/src/impl/module.rs
+++ b/zluda/src/impl/module.rs
@@ -61,8 +61,9 @@ pub(crate) fn load_hip_module(library: CodeLibraryRef) -> Result<hipModule_t, CU
     let text = get_ptx(library)?;
     let hip_properties = get_hip_properties()?;
     let gcn_arch = get_gcn_arch(&hip_properties)?;
-    let attributes = ptx::Attributes {
+    let attributes = ExtraCacheAttributes {
         clock_rate: hip_properties.clockRate as u32,
+        is_debug: cfg!(debug_assertions),
     };
     let mut cache_with_key = global_state.cache_path.as_ref().and_then(|p| {
         let cache = zluda_cache::ModuleCache::open(p)?;
@@ -84,6 +85,12 @@ pub(crate) fn load_hip_module(library: CodeLibraryRef) -> Result<hipModule_t, CU
     Ok(hip_module)
 }
 
+#[derive(serde::Serialize)]
+struct ExtraCacheAttributes {
+    is_debug: bool,
+    clock_rate: u32,
+}
+
 fn get_hip_properties<'a>() -> Result<hipDeviceProp_tR0600, CUerror> {
     let hip_dev = super::context::get_current_device()?;
     let mut props = unsafe { mem::zeroed() };
@@ -100,7 +107,7 @@ fn get_cache_key<'a, 'b>(
     global_state: &'static driver::GlobalState,
     isa: &'a str,
     text: &str,
-    attributes: &ptx::Attributes,
+    attributes: &impl serde::Serialize,
 ) -> Option<zluda_cache::ModuleKey<'a>> {
     // Serialization here is deterministic. When marking a type with
     // #[derive(serde::Serialize)] the derived implementation will just write
@@ -129,7 +136,7 @@ fn load_cached_binary(
 fn compile_from_ptx_and_cache(
     comgr: &comgr::Comgr,
     gcn_arch: &str,
-    attributes: ptx::Attributes,
+    attributes: ExtraCacheAttributes,
     text: &str,
     cache_with_key: &mut Option<(zluda_cache::ModuleCache, zluda_cache::ModuleKey)>,
 ) -> Result<Vec<u8>, CUerror> {
@@ -138,7 +145,14 @@ fn compile_from_ptx_and_cache(
     } else {
         ptx_parser::parse_module_unchecked(text)
     };
-    let llvm_module = ptx::to_llvm_module(ast, attributes, |_| {}).map_err(|_| CUerror::UNKNOWN)?;
+    let llvm_module = ptx::to_llvm_module(
+        ast,
+        ptx::Attributes {
+            clock_rate: attributes.clock_rate,
+        },
+        |_| {},
+    )
+    .map_err(|_| CUerror::UNKNOWN)?;
     let elf_module = comgr::compile_bitcode(
         comgr,
         gcn_arch,
diff --git a/zluda/src/impl/pointer.rs b/zluda/src/impl/pointer.rs
index 8eda15e..6541fce 100644
--- a/zluda/src/impl/pointer.rs
+++ b/zluda/src/impl/pointer.rs
@@ -2,7 +2,7 @@ use cuda_types::cuda::*;
 use hip_runtime_sys::*;
 use std::{ffi::c_void, ptr};
 
-use crate::r#impl::driver;
+use crate::r#impl::{driver, hipfix};
 
 // TODO: handlehipMemoryTypeUnregistered
 fn to_cu_memory_type(cu: hipMemoryType) -> Result<CUmemorytype, hipErrorCode_t> {
@@ -59,7 +59,12 @@ pub(crate) unsafe fn get_attributes(
     data: &mut *mut ::core::ffi::c_void,
     ptr: hipDeviceptr_t,
 ) -> CUresult {
-    hipDrvPointerGetAttributes(num_attributes, attributes, data, ptr)?;
+    hipDrvPointerGetAttributes(
+        num_attributes,
+        attributes,
+        data,
+        hipfix::get_attributes(ptr),
+    )?;
     let attributes = std::slice::from_raw_parts_mut(attributes, num_attributes as usize);
     let data = std::slice::from_raw_parts_mut(data, num_attributes as usize);
     for (attr, data_ptr) in attributes.iter().copied().zip(data.iter().copied()) {
@@ -88,7 +93,7 @@ mod tests {
     use crate::tests::CudaApi;
     use cuda_macros::test_cuda;
     use cuda_types::cuda::*;
-    use std::{ffi::c_void, mem, ptr};
+    use std::{ffi::c_void, i32, mem, ptr, usize};
 
     #[test_cuda]
     pub unsafe fn unknown_ptr_attribute(api: impl CudaApi) {
@@ -162,4 +167,47 @@ mod tests {
         );
         assert_eq!(context, CUcontext(ptr::null_mut()));
     }
+
+    #[test_cuda]
+    pub unsafe fn null_ptr_attributes_success(api: impl CudaApi) {
+        api.cuInit(0);
+        api.cuCtxCreate_v2(&mut mem::zeroed(), 0, 0);
+        let mut context = CUcontext(1 as _);
+        let mut mem_type = mem::transmute::<_, CUmemorytype>(u32::MAX);
+        let mut dev_ptr = mem::transmute::<_, *mut c_void>(usize::MAX);
+        let mut host_ptr = mem::transmute::<_, *mut c_void>(usize::MAX);
+        let mut is_managed = true;
+        let mut ordinal = i32::MAX;
+        let mut attrs = [
+            CUpointer_attribute::CU_POINTER_ATTRIBUTE_CONTEXT,
+            CUpointer_attribute::CU_POINTER_ATTRIBUTE_MEMORY_TYPE,
+            CUpointer_attribute::CU_POINTER_ATTRIBUTE_DEVICE_POINTER,
+            CUpointer_attribute::CU_POINTER_ATTRIBUTE_HOST_POINTER,
+            CUpointer_attribute::CU_POINTER_ATTRIBUTE_IS_MANAGED,
+            CUpointer_attribute::CU_POINTER_ATTRIBUTE_DEVICE_ORDINAL,
+        ];
+        let mut values = [
+            std::ptr::from_mut(&mut context).cast::<c_void>(),
+            std::ptr::from_mut(&mut mem_type).cast::<c_void>(),
+            std::ptr::from_mut(&mut dev_ptr).cast::<c_void>(),
+            std::ptr::from_mut(&mut host_ptr).cast::<c_void>(),
+            std::ptr::from_mut(&mut is_managed).cast::<c_void>(),
+            std::ptr::from_mut(&mut ordinal).cast::<c_void>(),
+        ];
+        assert_eq!(
+            CUresult::SUCCESS,
+            api.cuPointerGetAttributes_unchecked(
+                attrs.len() as u32,
+                attrs.as_mut_ptr(),
+                values.as_mut_ptr(),
+                CUdeviceptr_v2(ptr::null_mut())
+            )
+        );
+        assert_eq!(context, CUcontext(ptr::null_mut()));
+        assert_eq!(mem_type, CUmemorytype(0));
+        assert_eq!(dev_ptr, ptr::null_mut());
+        assert_eq!(host_ptr, ptr::null_mut());
+        assert_eq!(is_managed, false);
+        assert_eq!(ordinal, -2);
+    }
 }