Introduce a simpler StructuredBuffer test

This moves the current structured buffer test to a new file and
introduces a simpler one that doesn't need llvm/llvm-project#104503 and
llvm/llvm-project#121010 to be in place in order to pass.

Note: this would be better if it exercised both SRVs and UAVs, but SRV
support isn't implemented in the test framework yet.

test/Basic/StructuredBuffer-packed.test

@@ -0,0 +1,45 @@
+#--- source.hlsl
+struct Doggo {
+  int3 Legs;
+  int TailState;
+  int2 Ears;
+};
+
+RWStructuredBuffer<Doggo> Buf;
+
+[numthreads(2,1,1)]
+void main(uint GI : SV_GroupIndex) {
+  Doggo Fido = Buf[GI];
+  if (Fido.TailState == 0) {
+    Fido.TailState = Fido.Legs.x + Fido.Legs.y + Fido.Legs.z;
+  }
+  Buf[GI] = Fido;
+}
+//--- pipeline.yaml
+---
+DispatchSize: [1, 1, 1]
+DescriptorSets:
+  - Resources:
+    - Access: ReadWrite
+      Format: Int32
+      RawSize: 24
+      Data: [ 0, 1, 2, 0, 4, 0, 1, 2, 3, 0, 4, 0]
+      DirectXBinding:
+        Register: 0
+        Space: 0
+...
+#--- end
+
+# UNSUPPORTED: Clang
+# RUN: split-file %s %t
+# RUN: %if DirectX %{ dxc -T cs_6_0 -Fo %t.dxil %t/source.hlsl %}
+# RUN: %if DirectX %{ %offloader %t/pipeline.yaml %t.dxil | FileCheck %s %}
+# RUN: %if Vulkan %{ dxc -T cs_6_0 -spirv -fspv-target-env=vulkan1.3 -fvk-use-scalar-layout -Fo %t.spv %t/source.hlsl %}
+# RUN: %if Vulkan %{ %offloader %t/pipeline.yaml %t.spv | FileCheck %s %}
+
+# RUN: %if Metal %{ dxc -T cs_6_0 -Fo %t.dxil %t/source.hlsl %}
+# RUN: %if Metal %{ metal-shaderconverter %t.dxil -o=%t.metallib %}
+# RUN: %if Metal %{ %offloader %t/pipeline.yaml %t.metallib | FileCheck %s %}
+
+
+# CHECK: Data: [ 0, 1, 2, 3, 4, 0, 1, 2, 3, 6, 4, 0 ]

test/Basic/StructuredBuffer.test

@@ -1,36 +1,44 @@
 #--- source.hlsl
-struct Doggo {
-  int3 Legs;
-  int TailState;
-  int2 Ears;
+struct S1 {
+  int4 i;
+  float4 f;
+};
+struct S2 {
+  float4 f;
+  int4 i;
 };
 
-RWStructuredBuffer<Doggo> Buf;
+RWStructuredBuffer<S1> In : register(u0);
+RWStructuredBuffer<S2> Out : register(u1);
 
-[numthreads(2,1,1)]
+[numthreads(1,1,1)]
 void main(uint GI : SV_GroupIndex) {
-  Doggo Fido = Buf[GI];
-  if (Fido.TailState == 0) {
-    Fido.TailState = Fido.Legs.x + Fido.Legs.y + Fido.Legs.z;
-  }
-  Buf[GI] = Fido;
+  Out[GI].f = In[GI].f;
+  Out[GI].i = In[GI].i;
 }
 //--- pipeline.yaml
 ---
 DispatchSize: [1, 1, 1]
 DescriptorSets:
   - Resources:
     - Access: ReadWrite
-      Format: Int32
-      RawSize: 24
-      Data: [ 0, 1, 2, 0, 4, 0, 1, 2, 3, 0, 4, 0]
+      Format: Hex32
+      RawSize: 32
+      Data: [0x00000000, 0x00000001, 0x00000002, 0x00000003,
+             0x00000000, 0x3f800000, 0x40000000, 0x40400000]
       DirectXBinding:
         Register: 0
         Space: 0
+    - Access: ReadWrite
+      Format: Hex32
+      RawSize: 32
+      ZeroInitSize: 32
+      DirectXBinding:
+        Register: 1
+        Space: 0
 ...
 #--- end
 
-# UNSUPPORTED: Clang
 # RUN: split-file %s %t
 # RUN: %if DirectX %{ dxc -T cs_6_0 -Fo %t.dxil %t/source.hlsl %}
 # RUN: %if DirectX %{ %offloader %t/pipeline.yaml %t.dxil | FileCheck %s %}
@@ -41,5 +49,13 @@ DescriptorSets:
 # RUN: %if Metal %{ metal-shaderconverter %t.dxil -o=%t.metallib %}
 # RUN: %if Metal %{ %offloader %t/pipeline.yaml %t.metallib | FileCheck %s %}
 
-
-# CHECK: Data: [ 0, 1, 2, 3, 4, 0, 1, 2, 3, 6, 4, 0 ]
+# CHECK: Data: [
+# CHECK: 0x0,
+# CHECK: 0x3F800000,
+# CHECK: 0x40000000,
+# CHECK: 0x40400000,
+# CHECK: 0x0,
+# CHECK: 0x1,
+# CHECK: 0x2,
+# CHECK: 0x3
+# CHECK: ]