Fix atomic operations on RWBuffer (#593)

* Fix atomic operations on RWBuffer

An earlier change added support for passing true pointers to `__ref` parameters to fix the global `Interlocked*()` functions when applied to `groupshared` variables or `RWStructureBuffer<T>` elements.
That change didn't apply to `RWBuffer<T>` or `RWTexture2D<T>`, etc. because those types had so far only declared `get` and `set` accessors, but not any `ref` accessors (which return a pointer).

The main fixes here are:

* Add `ref` accessors to the subscript oeprations on the `RW*` resource types

* Adjust the logic for emitting calls to subscript accessors so that we don't get quite as eager about invoking a `ref` accessor, and instead try to invoke just a `get` or `set` accessor when these will suffice. This is important for Vulkan cross-compilation, where we don't yet support the semantics of our `ref` accessors.

* Add a test case for atomics on a `RWBuffer`

* Fix up `render-test` so that we can specify a format for a buffer resource, which allows us to use things other than `*StructuredBuffer` and `*ByteAddressBuffer`. The work there is probably not complete; I just did what I could to get the test working.

* A bunch of files got whitespace edits thanks to the fact that I'm using editorconfig and others on the project seemingly arent...

* fixup: remove ifdefed-out code

1 files changed, 6 insertions, 4 deletions

diff --git a/tools/render-test/d3d-util.cpp b/tools/render-test/d3d-util.cpp
index fb3cb49bf..bef0e6baa 100644
--- a/tools/render-test/d3d-util.cpp
+++ b/tools/render-test/d3d-util.cpp
@@ -31,6 +31,7 @@ using namespace Slang;
         case Format::RG_Float32:            return DXGI_FORMAT_R32G32_FLOAT;
         case Format::R_Float32:             return DXGI_FORMAT_R32_FLOAT;
         case Format::RGBA_Unorm_UInt8:      return DXGI_FORMAT_R8G8B8A8_UNORM;
+        case Format::R_UInt32:              return DXGI_FORMAT_R32_UINT;
 
         case Format::D_Float32:             return DXGI_FORMAT_D32_FLOAT;
         case Format::D_Unorm24_S8:          return DXGI_FORMAT_D24_UNORM_S8_UINT;
@@ -47,7 +48,8 @@ using namespace Slang;
         switch (format)
         {
             case DXGI_FORMAT_R32_FLOAT:     /* fallthru */
-            case DXGI_FORMAT_D32_FLOAT:            
+            case DXGI_FORMAT_R32_UINT:
+            case DXGI_FORMAT_D32_FLOAT:
             {
                 return DXGI_FORMAT_R32_TYPELESS;
             }
@@ -73,7 +75,7 @@ using namespace Slang;
             switch (format)
             {
                 case DXGI_FORMAT_D32_FLOAT:     /* fallthru */
-                case DXGI_FORMAT_R32_TYPELESS:            
+                case DXGI_FORMAT_R32_TYPELESS:
                 {
                     return DXGI_FORMAT_D32_FLOAT;
                 }
@@ -88,7 +90,7 @@ using namespace Slang;
             switch (format)
             {
                 case DXGI_FORMAT_D32_FLOAT:     /* fallthru */
-                case DXGI_FORMAT_D24_UNORM_S8_UINT: 
+                case DXGI_FORMAT_D24_UNORM_S8_UINT:
                 {
                     return DXGI_FORMAT_UNKNOWN;
                 }
@@ -102,7 +104,7 @@ using namespace Slang;
             switch (format)
             {
                 case DXGI_FORMAT_D32_FLOAT:     /* fallthru */
-                case DXGI_FORMAT_R32_TYPELESS:            
+                case DXGI_FORMAT_R32_TYPELESS:
                 {
                     return DXGI_FORMAT_R32_FLOAT;
                 }