Method FindVariableID

Source/SpireCore/SpirVCodeGen.cpp:1899–1909

			}

			int FindVariableID(ILOperand* op)
			{
				auto it = StackVariableNameToStorageID.end();
				while (it != StackVariableNameToStorageID.begin())
				{
					it--;
					if (it->ContainsKey(op))
						return (*it)[op];
				}
				return -1;
			}

			// ***NOTICE***: 
			//   There is no relation between VariableNameToStorageID and ValueIDToVariableNames.