From 6e78513c431430557a88b6fea628eaa0361d3348 Mon Sep 17 00:00:00 2001
From: David Mak <chmakac@connect.ust.hk>
Date: Fri, 8 Nov 2024 15:49:01 +0800
Subject: [PATCH] [core] codegen: Add dtype to NDArrayType

We won't have this once NDArray is refactored to strided impl.
---
 nac3core/src/codegen/types/ndarray.rs | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/nac3core/src/codegen/types/ndarray.rs b/nac3core/src/codegen/types/ndarray.rs
index 98bcdb62..3f25f828 100644
--- a/nac3core/src/codegen/types/ndarray.rs
+++ b/nac3core/src/codegen/types/ndarray.rs
@@ -15,6 +15,7 @@ use crate::codegen::{
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub struct NDArrayType<'ctx> {
     ty: PointerType<'ctx>,
+    dtype: BasicTypeEnum<'ctx>,
     llvm_usize: IntType<'ctx>,
 }
 
@@ -112,7 +113,14 @@ impl<'ctx> NDArrayType<'ctx> {
     pub fn from_type(ptr_ty: PointerType<'ctx>, llvm_usize: IntType<'ctx>) -> Self {
         debug_assert!(Self::is_representable(ptr_ty, llvm_usize).is_ok());
 
-        NDArrayType { ty: ptr_ty, llvm_usize }
+        NDArrayType {
+            ty: ptr_ty,
+            dtype: ptr_ty
+                .get_element_type()
+                .try_into()
+                .expect("Expected BasicTypeEnum for dtype of NDArray"),
+            llvm_usize,
+        }
     }
 
     /// Returns the type of the `size` field of this `ndarray` type.
@@ -128,14 +136,8 @@ impl<'ctx> NDArrayType<'ctx> {
 
     /// Returns the element type of this `ndarray` type.
     #[must_use]
-    pub fn element_type(&self) -> AnyTypeEnum<'ctx> {
-        self.as_base_type()
-            .get_element_type()
-            .into_struct_type()
-            .get_field_type_at_index(2)
-            .map(BasicTypeEnum::into_pointer_type)
-            .map(PointerType::get_element_type)
-            .unwrap()
+    pub fn element_type(&self) -> BasicTypeEnum<'ctx> {
+        self.dtype
     }
 }