fix the bug in deref not checking for invalid handle and the block tracking trying to insert on a simple lookup

Then fix the CFrontendIR bugs

Author: devshgraphicsprogramming

include/nbl/asset/material_compiler3/CFrontendIR.h

@@ -773,8 +773,7 @@ class CFrontendIR final : public CNodePool
 				retval += "\\n";
 				retval += std::string_view(reinterpret_cast<const char*>(debug->data().data()),debug->data().size()-1);
 			}
-			// TODO: static and dynamic casts for handles
-			if (const auto* expr=getObjectPool().deref<const IExprNode>({{.value=handle.value}}); expr)
+			if (const auto* expr=dynamic_cast<const IExprNode*>(node); expr)
 				retval += expr->getLabelSuffix();
 			retval += "\"]";
 			return retval;

include/nbl/asset/material_compiler3/CNodePool.h

@@ -52,7 +52,7 @@ class CNodePool : public core::IReferenceCounted
 
 				static inline uint32_t calc_size(const void* data, const uint32_t size)
 				{
-					return sizeof(CDebugInfo)+size;
+					return core::alignUp(sizeof(CDebugInfo)+size,alignof(CDebugInfo));
 				}
 				static inline uint32_t calc_size(const std::string_view& view)
 				{

include/nbl/core/alloc/SimpleBlockBasedAllocator.h

@@ -366,7 +366,9 @@ class SimpleBlockBasedAllocator<AddressAllocator,HandleValue> final : protected
 		template<typename T> requires (!std::is_const_v<T>)
 		inline T* deref(typed_pointer_type<T> p)
 		{
-			return reinterpret_cast<T*>(std::launder(getBlock(p)->data(base_t::m_blockCreationParams)+getOffsetInBlock(p)));
+			if (p)
+				return reinterpret_cast<T*>(std::launder(getBlock(p)->data(base_t::m_blockCreationParams)+getOffsetInBlock(p)));
+			return nullptr;
 		}
 		template<typename T>
 		inline const T* deref(typed_pointer_type<T> p) const
@@ -440,7 +442,7 @@ class SimpleBlockBasedAllocator<AddressAllocator,HandleValue> final : protected
 
     private:
 		inline HandleValue getOffsetInBlock(const typed_pointer_type<const void> h) const {return h.value&m_loAddrMask;}
-		inline block_t* getBlock(const typed_pointer_type<const void> h) {return m_blocks[getBlockIndex(h)];}
+		inline block_t* getBlock(const typed_pointer_type<const void> h) {return m_blocks.find(getBlockIndex(h))->second;}
 
 		inline HandleValue getBlockIndex(const typed_pointer_type<const void> h) const {return h.value>>m_blockSizeLog2;}