DXC: don't optimize shader in debug mode

(possible fix for #244)

Author: azhirnov

Graphics/ShaderTools/src/DXCompiler.cpp

@@ -749,9 +749,12 @@ void DXCompilerImpl::Compile(const ShaderCreateInfo& ShaderCI,
             {
                 L"-spirv",
                 L"-fspv-reflect",
-                //L"-WX", // Warnings as errors
-                L"-O3", // Optimization level 3
-                L"-Zpc" // Matrices in column-major order
+                L"-Zpc", // Matrices in column-major order
+#ifdef DILIGENT_DEBUG
+                L"-Od",
+#else
+                L"-O3"
+#endif
             });
 
         if (m_APIVersion >= VK_API_VERSION_1_2 && ShaderModel >= ShaderVersion{6, 3})

Tests/DiligentCoreAPITest/assets/shaders/PipelineResourceSignature/GraphicsAndMeshShader.hlsl

@@ -1,9 +1,9 @@
-cbuffer Constants
+struct VSOutput
 {
-    float4 g_Data;
+    float4 f4Position : SV_Position;
+    float4 f4Color    : COLOR;
 };
 
-
 float4 CheckValue(float4 Val, float4 Expected)
 {
     return float4(Val.x == Expected.x ? 1.0 : 0.0,
@@ -12,6 +12,13 @@ float4 CheckValue(float4 Val, float4 Expected)
                   Val.w == Expected.w ? 1.0 : 0.0);
 }
 
+
+#if defined(VERTEX_SHADER) || defined(MESH_SHADER)
+cbuffer Constants
+{
+    float4 g_Data;
+};
+
 float4 VerifyResourcesVS()
 {
     float4 AllCorrect = float4(1.0, 1.0, 1.0, 1.0);
@@ -20,13 +27,6 @@ float4 VerifyResourcesVS()
 	return AllCorrect;
 }
 
-
-struct VSOutput
-{
-    float4 f4Position : SV_Position;
-    float4 f4Color    : COLOR;
-};
-
 void VSMain(in  uint     VertId : SV_VertexID,
             out VSOutput Out)
 {
@@ -64,8 +64,10 @@ void MSMain(             uint     I      : SV_GroupIndex,
                                  I % 3 == 2 ? 1.0 : 0.0,
                                  1.0) * VerifyResourcesVS();
 }
+#endif
 
 
+#ifdef PIXEL_SHADER
 Texture2D    g_Texture;
 SamplerState g_Texture_sampler;
 
@@ -82,3 +84,4 @@ float4 PSMain(in VSOutput In) : SV_Target
 {
     return In.f4Color * VerifyResourcesPS();
 }
+#endif