Fix incorrect binding index assignment for StructuredBuffer and ByteAddressBuffer with DescriptorHandle (#8252)

- [x] Fix segmentation fault in wrapConstantBufferElement for
DescriptorHandle types
- [x] Split DescriptorKind.Buffer into ConstantBuffer and StorageBuffer
- [x] Update binding enums with descriptive names (ConstantBuffer_Read,
StorageBuffer_Read, etc.)
- [x] Update resource type mappings for correct binding assignments
- [x] Update template logic to handle ConstantBuffer and StorageBuffer
kinds separately
- [x] Update tests to reflect correct binding assignments
- [x] Split DescriptorKind.TexelBuffer into UniformTexelBuffer and
StorageTexelBuffer
- [x] Update TextureBuffer<T> to use UniformTexelBuffer kind
- [x] Update _Texture extension to determine texel buffer kind based on
access mode
- [x] Update test desc-handle-1.slang to handle new DescriptorKind enum
cases

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---------

Co-authored-by: Yong He <yonghe@outlook.com>

3 files changed, 22 insertions, 2 deletions

diff --git a/tests/language-feature/descriptor-handle/desc-handle-1.slang b/tests/language-feature/descriptor-handle/desc-handle-1.slang
index 0621f4a84..407aee684 100644
--- a/tests/language-feature/descriptor-handle/desc-handle-1.slang
+++ b/tests/language-feature/descriptor-handle/desc-handle-1.slang
@@ -16,7 +16,7 @@ export T getDescriptorFromHandle<T:IOpaqueDescriptor>(DescriptorHandle<T> handle
     __target_switch
     {
     case spirv:
-        if (T.kind != DescriptorKind.Buffer)
+        if (T.kind != DescriptorKind.ConstantBuffer && T.kind != DescriptorKind.StorageBuffer)
             return resourceHeap[((uint2)handleValue).x].asOpaqueDescriptor<T>();
         else
             return defaultGetDescriptorFromHandle(handleValue);
diff --git a/tests/language-feature/descriptor-handle/desc-handle-default.slang b/tests/language-feature/descriptor-handle/desc-handle-default.slang
index 9a4d444d7..674662f4b 100644
--- a/tests/language-feature/descriptor-handle/desc-handle-default.slang
+++ b/tests/language-feature/descriptor-handle/desc-handle-default.slang
@@ -32,12 +32,12 @@ Texture1D<float> t4;
 //MIX-DAG: OpDecorate %__slang_resource_heap{{.*}} Binding 0
 //MIX-DAG: OpDecorate %__slang_resource_heap{{.*}} Binding 5
 //MIX-DAG: OpDecorate %__slang_resource_heap{{.*}} Binding 6
+//MIX-DAG: OpDecorate %__slang_resource_heap{{.*}} Binding 7
 
 //MIX-NOT: OpDecorate %__slang_resource_heap{{.*}} Binding 1
 //MIX-NOT: OpDecorate %__slang_resource_heap{{.*}} Binding 2
 //MIX-NOT: OpDecorate %__slang_resource_heap{{.*}} Binding 3
 //MIX-NOT: OpDecorate %__slang_resource_heap{{.*}} Binding 4
-//MIX-NOT: OpDecorate %__slang_resource_heap{{.*}} Binding 7
 //MIX-NOT: OpDecorate %__slang_resource_heap{{.*}} Binding 8
 
 #ifdef SAMPLER
@@ -89,6 +89,8 @@ uniform RWBuffer<float>.Handle rwTexelBuffer;
 #ifdef UNIFORM_BUFFER
 //UNIFORM_BUFFER: OpDecorate %__slang_resource_heap{{.*}} Binding 6
 //UNIFORM_BUFFER-NEXT: OpDecorate %__slang_resource_heap{{.*}} DescriptorSet 3
+//UNIFORM_BUFFER: OpDecorate %__slang_resource_heap{{.*}} Binding 7
+//UNIFORM_BUFFER-NEXT: OpDecorate %__slang_resource_heap{{.*}} DescriptorSet 3
 struct Data
 {
     float v;
diff --git a/tests/language-feature/enums/enum-use-prev-value.slang b/tests/language-feature/enums/enum-use-prev-value.slang
new file mode 100644
index 000000000..b3a9ed2eb
--- /dev/null
+++ b/tests/language-feature/enums/enum-use-prev-value.slang
@@ -0,0 +1,18 @@
+//TEST:INTERPRET(filecheck=CHECK):
+
+enum MyEnum
+{
+    A,
+    B = A,
+    C
+}
+
+void main()
+{
+    // CHECK: A = 0
+    printf("A = %d\n", MyEnum.A);
+    // CHECK: B = 0
+    printf("B = %d\n", MyEnum.B);
+    // CHECK: C = 1
+    printf("C = %d\n", MyEnum.C);
+}
\ No newline at end of file