Show adapter info in slang-test (#6388)

When -show-adapter-info is provided to slang-test, there is a subsequent pass over all available APIs to ask render-api to show which adapter will be used.

> .\slang-test.exe -show-adapter-info
Supported backends: fxc dxc glslang spirv-dis clang visualstudio genericcpp nvrtc llvm spirv-opt tint
Check vk,vulkan: Supported
Check dx12,d3d12: Supported
Check dx11,d3d11: Supported
Check cuda: Supported
Check wgpu,webgpu: Supported

Adapter Information for Available APIs:

vk,vulkan:
Using graphics adapter: NVIDIA RTX A3000 Laptop GPU

dx12,d3d12:
Using graphics adapter: NVIDIA RTX A3000 Laptop GPU

dx11,d3d11:
Using graphics adapter: Intel(R) UHD Graphics

cpu:

cuda:

wgpu,webgpu:
Using graphics adapter: default

passed test: 'tests/autodiff/arithmetic-jvp.slang (dx11)'
...

closes #5600

* format code

---------

Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>

3 files changed, 14 insertions, 0 deletions

diff --git a/tools/render-test/options.cpp b/tools/render-test/options.cpp
index 11b291c68..e0b38bf31 100644
--- a/tools/render-test/options.cpp
+++ b/tools/render-test/options.cpp
@@ -257,6 +257,10 @@ static rhi::DeviceType _toRenderType(Slang::RenderApiType apiType)
         {
             outOptions.dx12Experimental = true;
         }
+        else if (argValue == "-show-adapter-info")
+        {
+            outOptions.showAdapterInfo = true;
+        }
         else
         {
             // Lookup
diff --git a/tools/render-test/options.h b/tools/render-test/options.h
index c95edee21..f041c3e84 100644
--- a/tools/render-test/options.h
+++ b/tools/render-test/options.h
@@ -91,6 +91,8 @@ struct Options
 
     bool dx12Experimental = false;
 
+    bool showAdapterInfo = false;
+
     Options() { downstreamArgs.addName("slang"); }
 
     static SlangResult parse(
diff --git a/tools/render-test/render-test-main.cpp b/tools/render-test/render-test-main.cpp
index b0d6c44e0..d3d4a764c 100644
--- a/tools/render-test/render-test-main.cpp
+++ b/tools/render-test/render-test-main.cpp
@@ -1450,6 +1450,14 @@ static SlangResult _innerMain(
         }
     }
 
+    // Print adapter info after device creation but before any other operations
+    if (options.showAdapterInfo)
+    {
+        auto info = device->getDeviceInfo();
+        auto out = stdWriters->getOut();
+        out.print("Using graphics adapter: %s\n", info.adapterName);
+    }
+
     // If the only test is we can startup, then we are done
     if (options.onlyStartup)
     {