Pchp.CodeAnalysis.Semantics.Graph.StartBlock.Emit C# (CSharp) Method

        internal override void Emit(CodeGenerator cg)
        {
            // first brace sequence point
            var body = cg.Routine.Syntax.BodySpanOrInvalid();
            if (body.IsValid && cg.IsDebug)
            {
                cg.EmitSequencePoint(new Span(body.Start, 1));
                cg.EmitOpCode(ILOpCode.Nop);
            }
            else
            {
                cg.Builder.DefineInitialHiddenSequencePoint();
            }

            //
            if (cg.IsDebug)
            {
                if (cg.Routine.IsStatic)
                {
                    // Debug.Assert(<context> != null);
                    cg.EmitDebugAssertNotNull(cg.ContextPlaceOpt, "Context cannot be null.");
                }

                // TODO: emit parameters checks
            }

            //
            var locals = cg.Routine.LocalsTable;

            // in case of script, declare the script, functions and types
            if (cg.Routine is Symbols.SourceGlobalMethodSymbol)
            {
                // <ctx>.OnInclude<TScript>()
                cg.EmitLoadContext();
                cg.EmitCall(ILOpCode.Callvirt, cg.CoreMethods.Context.OnInclude_TScript.Symbol.Construct(cg.Routine.ContainingType));

                // <ctx>.DeclareFunction()
                cg.Routine.ContainingFile.Functions
                    .Where(f => !f.IsConditional)
                    .ForEach(cg.EmitDeclareFunction);
                // <ctx>.DeclareType()
                cg.DeclaringCompilation.SourceSymbolTables.GetTypes()
                    .OfType<Symbols.SourceTypeSymbol>()
                    .Where(t => !t.Syntax.IsConditional && t.ContainingFile == cg.Routine.ContainingFile)   // non conditional declaration within this file
                    .ForEach(cg.EmitDeclareType);
            }
            else
            {
                if (cg.HasUnoptimizedLocals)
                {
                    // <locals> = new PhpArray(HINTCOUNT)
                    cg.LocalsPlaceOpt.EmitStorePrepare(cg.Builder);
                    cg.Builder.EmitIntConstant(locals.Count);    // HINTCOUNT
                    cg.EmitCall(ILOpCode.Newobj, cg.CoreMethods.Ctors.PhpArray_int);
                    cg.LocalsPlaceOpt.EmitStore(cg.Builder);
                }
            }

            // variables/parameters initialization
            foreach (var loc in locals.Variables)
            {
                loc.EmitInit(cg);
            }

            //
            base.Emit(cg);
        }
    }