Add shader entry tag to common header

* We also allow GetPointerType to silently return NULL when no pointer exists,
  as this will be useful for encoding when we want to check if a pointer type
  exists.

renderdoc/driver/shaders/dxil/dxil_bytecode.cpp

@@ -2435,9 +2435,7 @@ const Type *Program::GetPointerType(const Type *type, Type::PointerAddrSpace add
     }
   }
 
-  RDCERR("Couldn't find pointer type");
-
-  return type;
+  return NULL;
 }
 
 Metadata::~Metadata()

renderdoc/driver/shaders/dxil/dxil_common.h

@@ -81,6 +81,15 @@ enum class ResourceKind
   SamplerComparison,
 };
 
+enum class ShaderEntryTag
+{
+  ShaderFlags = 0,
+  Geometry = 1,
+  Domain = 2,
+  Hull = 3,
+  Compute = 4,
+};
+
 };    // namespace DXIL
 
 DECLARE_STRINGISE_TYPE(DXIL::ComponentType);

renderdoc/driver/shaders/dxil/dxil_reflect.cpp

@@ -28,15 +28,6 @@
 
 namespace DXIL
 {
-enum class ShaderTag
-{
-  ShaderFlags = 0,
-  Geometry = 1,
-  Domain = 2,
-  Hull = 3,
-  Compute = 4,
-};
-
 enum class ResField
 {
   ID = 0,
@@ -149,7 +140,7 @@ void Program::FetchComputeProperties(DXBC::Reflection *reflection)
       for(size_t t = 0; t < tags.children.size(); t += 2)
       {
         RDCASSERT(tags.children[t]->isConstant);
-        if(getival<ShaderTag>(tags.children[t]) == ShaderTag::Compute)
+        if(getival<ShaderEntryTag>(tags.children[t]) == ShaderEntryTag::Compute)
         {
           Metadata &threadDim = *tags.children[t + 1];
           RDCASSERTEQUAL(threadDim.children.size(), 3);
@@ -190,7 +181,7 @@ D3D_PRIMITIVE_TOPOLOGY Program::GetOutputTopology()
       for(size_t t = 0; t < tags.children.size(); t += 2)
       {
         RDCASSERT(tags.children[t]->isConstant);
-        if(getival<ShaderTag>(tags.children[t]) == ShaderTag::Geometry)
+        if(getival<ShaderEntryTag>(tags.children[t]) == ShaderEntryTag::Geometry)
         {
           Metadata &geomData = *tags.children[t + 1];
           RDCASSERTEQUAL(geomData.children.size(), 5);