[clang] [HLSL] Add `[[hlsl::raw_buffer]]` attribute (PR #107954)

[Damyan Pepper via cfe-commits]

================
@@ -6168,10 +6168,19 @@ class HLSLAttributedResourceType : public Type, public llvm::FoldingSetNode {
   struct Attributes {
     // Data gathered from HLSL resource attributes
     llvm::dxil::ResourceClass ResourceClass;
+
+    LLVM_PREFERRED_TYPE(bool)
     uint8_t IsROV : 1;
-    Attributes(llvm::dxil::ResourceClass ResourceClass, bool IsROV)
-        : ResourceClass(ResourceClass), IsROV(IsROV) {}
-    Attributes() : ResourceClass(llvm::dxil::ResourceClass::UAV), IsROV(0) {}
+
+    LLVM_PREFERRED_TYPE(bool)
+    uint8_t RawBuffer : 1;
+
+    Attributes(llvm::dxil::ResourceClass ResourceClass, bool IsROV,
+               bool RawBuffer)
+        : ResourceClass(ResourceClass), IsROV(IsROV), RawBuffer(RawBuffer) {}
+    Attributes()
+        : ResourceClass(llvm::dxil::ResourceClass::UAV), IsROV(false),
+          RawBuffer(false) {}
----------------
damyanp wrote:

Wondering if a delegating constructor would be preferable here, just to make clear that this version just sets defaults.

```suggestion
    Attributes()
        : Attributes(llvm::dxil::ResourceClass::UAV, false, false) {}
```

Or maybe we could just provide defaults for the parameters in the other constructor?


https://github.com/llvm/llvm-project/pull/107954